Merging upstream version 2.1.8~rc1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

78 files changed, 4115 insertions, 3676 deletions

diff --git a/daemons/attrd/attrd_alerts.c b/daemons/attrd/attrd_alerts.c
index 495e18f..4e97743 100644
--- a/daemons/attrd/attrd_alerts.c
+++ b/daemons/attrd/attrd_alerts.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2023 the Pacemaker project contributors
+ * Copyright 2015-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -10,11 +10,11 @@
 #include <crm_internal.h>
 #include <crm/crm.h>
 #include <crm/cib/internal.h>
-#include <crm/msg_xml.h>
 #include <crm/cluster/internal.h>
 #include <crm/cluster/election_internal.h>
 #include <crm/common/alerts_internal.h>
 #include <crm/common/cib_internal.h>
+#include <crm/common/xml.h>
 #include <crm/pengine/rules_internal.h>
 #include <crm/lrmd_internal.h>
 #include "pacemaker-attrd.h"
@@ -48,7 +48,7 @@ attrd_lrmd_connect(void)
         int ret = -ENOTCONN;
 
         for (int fails = 0; fails < max_attempts; ++fails) {
-            ret = the_lrmd->cmds->connect(the_lrmd, T_ATTRD, NULL);
+            ret = the_lrmd->cmds->connect(the_lrmd, PCMK__VALUE_ATTRD, NULL);
             if (ret == pcmk_ok) {
                 break;
             }
@@ -93,11 +93,11 @@ config_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void
     }
 
     crmalerts = output;
-    if ((crmalerts != NULL) && !pcmk__xe_is(crmalerts, XML_CIB_TAG_ALERTS)) {
-        crmalerts = first_named_child(crmalerts, XML_CIB_TAG_ALERTS);
+    if ((crmalerts != NULL) && !pcmk__xe_is(crmalerts, PCMK_XE_ALERTS)) {
+        crmalerts = pcmk__xe_first_child(crmalerts, PCMK_XE_ALERTS, NULL, NULL);
     }
     if (!crmalerts) {
-        crm_notice("CIB query result has no " XML_CIB_TAG_ALERTS " section");
+        crm_notice("CIB query result has no " PCMK_XE_ALERTS " section");
         return;
     }
 
@@ -113,7 +113,7 @@ attrd_read_options(gpointer user_data)
     CRM_CHECK(the_cib != NULL, return TRUE);
 
     call_id = the_cib->cmds->query(the_cib,
-                                   pcmk__cib_abs_xpath_for(XML_CIB_TAG_ALERTS),
+                                   pcmk__cib_abs_xpath_for(PCMK_XE_ALERTS),
                                    NULL, cib_xpath|cib_scope_local);
 
     the_cib->cmds->register_callback_full(the_cib, call_id, 120, FALSE, NULL,
diff --git a/daemons/attrd/attrd_attributes.c b/daemons/attrd/attrd_attributes.c
index 388c181..974de89 100644
--- a/daemons/attrd/attrd_attributes.c
+++ b/daemons/attrd/attrd_attributes.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the Pacemaker project contributors
+ * Copyright 2013-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,6 @@
 #include <stdlib.h>
 #include <glib.h>
 
-#include <crm/msg_xml.h>
 #include <crm/common/logging.h>
 #include <crm/common/results.h>
 #include <crm/common/strings_internal.h>
@@ -26,55 +25,56 @@ static attribute_t *
 attrd_create_attribute(xmlNode *xml)
 {
     int is_private = 0;
-    int dampen = 0;
+    long long dampen = 0;
     const char *name = crm_element_value(xml, PCMK__XA_ATTR_NAME);
     const char *set_type = crm_element_value(xml, PCMK__XA_ATTR_SET_TYPE);
     const char *dampen_s = crm_element_value(xml, PCMK__XA_ATTR_DAMPENING);
     attribute_t *a = NULL;
 
     if (set_type == NULL) {
-        set_type = XML_TAG_ATTR_SETS;
+        set_type = PCMK_XE_INSTANCE_ATTRIBUTES;
     }
 
     /* Set type is meaningful only when writing to the CIB. Private
      * attributes are not written.
      */
     crm_element_value_int(xml, PCMK__XA_ATTR_IS_PRIVATE, &is_private);
-    if ((is_private != 0)
-        && !pcmk__str_any_of(set_type, XML_TAG_ATTR_SETS, XML_TAG_UTILIZATION,
-                             NULL)) {
+    if (!is_private && !pcmk__str_any_of(set_type,
+                                         PCMK_XE_INSTANCE_ATTRIBUTES,
+                                         PCMK_XE_UTILIZATION, NULL)) {
         crm_warn("Ignoring attribute %s with invalid set type %s",
                  pcmk__s(name, "(unidentified)"), set_type);
         return NULL;
     }
 
-    a = calloc(1, sizeof(attribute_t));
-    CRM_ASSERT(a != NULL);
-
-    a->is_private = is_private;
-    pcmk__str_update(&a->id, name);
-    pcmk__str_update(&a->set_type, set_type);
+    a = pcmk__assert_alloc(1, sizeof(attribute_t));
 
+    a->id = pcmk__str_copy(name);
+    a->set_type = pcmk__str_copy(set_type);
     a->set_id = crm_element_value_copy(xml, PCMK__XA_ATTR_SET);
-    a->uuid = crm_element_value_copy(xml, PCMK__XA_ATTR_UUID);
+    a->user = crm_element_value_copy(xml, PCMK__XA_ATTR_USER);
     a->values = pcmk__strikey_table(NULL, attrd_free_attribute_value);
 
-    a->user = crm_element_value_copy(xml, PCMK__XA_ATTR_USER);
-    crm_trace("Performing all %s operations as user '%s'", a->id, a->user);
+    if (is_private) {
+        attrd_set_attr_flags(a, attrd_attr_is_private);
+    }
 
     if (dampen_s != NULL) {
         dampen = crm_get_msec(dampen_s);
     }
-    crm_trace("Created attribute %s with %s write delay", a->id,
-              (a->timeout_ms == 0)? "no" : pcmk__readable_interval(a->timeout_ms));
 
-    if(dampen > 0) {
-        a->timeout_ms = dampen;
+    if (dampen > 0) {
+        a->timeout_ms = (int) QB_MIN(dampen, INT_MAX);
         a->timer = attrd_add_timer(a->id, a->timeout_ms, a);
     } else if (dampen < 0) {
         crm_warn("Ignoring invalid delay %s for attribute %s", dampen_s, a->id);
     }
 
+    crm_trace("Created attribute %s with %s write delay and %s CIB user",
+              a->id,
+              ((dampen > 0)? pcmk__readable_interval(a->timeout_ms) : "no"),
+              pcmk__s(a->user, "default"));
+
     g_hash_table_replace(attributes, a->id, a);
     return a;
 }
@@ -83,7 +83,7 @@ static int
 attrd_update_dampening(attribute_t *a, xmlNode *xml, const char *attr)
 {
     const char *dvalue = crm_element_value(xml, PCMK__XA_ATTR_DAMPENING);
-    int dampen = 0;
+    long long dampen = 0;
 
     if (dvalue == NULL) {
         crm_warn("Could not update %s: peer did not specify value for delay",
@@ -100,7 +100,7 @@ attrd_update_dampening(attribute_t *a, xmlNode *xml, const char *attr)
 
     if (a->timeout_ms != dampen) {
         mainloop_timer_del(a->timer);
-        a->timeout_ms = dampen;
+        a->timeout_ms = (int) QB_MIN(dampen, INT_MAX);
         if (dampen > 0) {
             a->timer = attrd_add_timer(attr, a->timeout_ms, a);
             crm_info("Update attribute %s delay to %dms (%s)",
@@ -136,20 +136,21 @@ xmlNode *
 attrd_add_value_xml(xmlNode *parent, const attribute_t *a,
                     const attribute_value_t *v, bool force_write)
 {
-    xmlNode *xml = create_xml_node(parent, __func__);
+    xmlNode *xml = pcmk__xe_create(parent, __func__);
 
     crm_xml_add(xml, PCMK__XA_ATTR_NAME, a->id);
+    crm_xml_add(xml, PCMK__XA_ATTR_SET_TYPE, a->set_type);
     crm_xml_add(xml, PCMK__XA_ATTR_SET, a->set_id);
-    crm_xml_add(xml, PCMK__XA_ATTR_UUID, a->uuid);
     crm_xml_add(xml, PCMK__XA_ATTR_USER, a->user);
     pcmk__xe_add_node(xml, v->nodename, v->nodeid);
-    if (v->is_remote != 0) {
+    if (pcmk_is_set(v->flags, attrd_value_remote)) {
         crm_xml_add_int(xml, PCMK__XA_ATTR_IS_REMOTE, 1);
     }
     crm_xml_add(xml, PCMK__XA_ATTR_VALUE, v->current);
     crm_xml_add_int(xml, PCMK__XA_ATTR_DAMPENING, a->timeout_ms / 1000);
-    crm_xml_add_int(xml, PCMK__XA_ATTR_IS_PRIVATE, a->is_private);
-    crm_xml_add_int(xml, PCMK__XA_ATTR_FORCE, force_write);
+    crm_xml_add_int(xml, PCMK__XA_ATTR_IS_PRIVATE,
+                    pcmk_is_set(a->flags, attrd_attr_is_private));
+    crm_xml_add_int(xml, PCMK__XA_ATTRD_IS_FORCE_WRITE, force_write);
 
     return xml;
 }
@@ -166,8 +167,7 @@ attrd_clear_value_seen(void)
     while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
         g_hash_table_iter_init(&vIter, a->values);
         while (g_hash_table_iter_next(&vIter, NULL, (gpointer *) & v)) {
-            v->seen = FALSE;
-            crm_trace("Clear seen flag %s[%s] = %s.", a->id, v->nodename, v->current);
+            attrd_clear_value_flags(v, attrd_value_from_peer);
         }
     }
 }
@@ -178,9 +178,9 @@ attrd_populate_attribute(xmlNode *xml, const char *attr)
     attribute_t *a = NULL;
     bool update_both = false;
 
-    const char *op = crm_element_value(xml, PCMK__XA_TASK);
+    const char *op = crm_element_value(xml, PCMK_XA_TASK);
 
-    // NULL because PCMK__ATTRD_CMD_SYNC_RESPONSE has no PCMK__XA_TASK
+    // NULL because PCMK__ATTRD_CMD_SYNC_RESPONSE has no PCMK_XA_TASK
     update_both = pcmk__str_eq(op, PCMK__ATTRD_CMD_UPDATE_BOTH,
                                pcmk__str_null_matches);
 
@@ -210,3 +210,66 @@ attrd_populate_attribute(xmlNode *xml, const char *attr)
 
     return a;
 }
+
+/*!
+ * \internal
+ * \brief Get the XML ID used to write out an attribute set
+ *
+ * \param[in] attr           Attribute to get set ID for
+ * \param[in] node_state_id  XML ID of node state that attribute value is for
+ *
+ * \return Newly allocated string with XML ID to use for \p attr set
+ */
+char *
+attrd_set_id(const attribute_t *attr, const char *node_state_id)
+{
+    char *set_id = NULL;
+
+    CRM_ASSERT((attr != NULL) && (node_state_id != NULL));
+
+    if (attr->set_id == NULL) {
+        /* @COMPAT This should really take the set type into account. Currently
+         * we use the same XML ID for transient attributes and utilization
+         * attributes. It doesn't cause problems because the status section is
+         * not limited by the schema in any way, but it's still unfortunate.
+         * For backward compatibility reasons, we can't change this.
+         */
+        set_id = crm_strdup_printf("%s-%s", PCMK_XE_STATUS, node_state_id);
+    } else {
+        /* @COMPAT When the user specifies a set ID for an attribute, it is the
+         * same for every node. That is less than ideal, but again, the schema
+         * doesn't enforce anything for the status section. We couldn't change
+         * it without allowing the set ID to vary per value rather than per
+         * attribute, which would break backward compatibility, pose design
+         * challenges, and potentially cause problems in rolling upgrades.
+         */
+        set_id = pcmk__str_copy(attr->set_id);
+    }
+    crm_xml_sanitize_id(set_id);
+    return set_id;
+}
+
+/*!
+ * \internal
+ * \brief Get the XML ID used to write out an attribute value
+ *
+ * \param[in] attr           Attribute to get value XML ID for
+ * \param[in] node_state_id  UUID of node that attribute value is for
+ *
+ * \return Newly allocated string with XML ID of \p attr value
+ */
+char *
+attrd_nvpair_id(const attribute_t *attr, const char *node_state_id)
+{
+    char *nvpair_id = NULL;
+
+    if (attr->set_id != NULL) {
+        nvpair_id = crm_strdup_printf("%s-%s", attr->set_id, attr->id);
+
+    } else {
+        nvpair_id = crm_strdup_printf(PCMK_XE_STATUS "-%s-%s",
+                                      node_state_id, attr->id);
+    }
+    crm_xml_sanitize_id(nvpair_id);
+    return nvpair_id;
+}
diff --git a/daemons/attrd/attrd_cib.c b/daemons/attrd/attrd_cib.c
index 80e5580..2537ade 100644
--- a/daemons/attrd/attrd_cib.c
+++ b/daemons/attrd/attrd_cib.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2023 the Pacemaker project contributors
+ * Copyright 2013-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -15,11 +15,12 @@
 #include <stdlib.h>
 #include <glib.h>
 
-#include <crm/msg_xml.h>
+#include <crm/cib/internal.h>       // cib__*
 #include <crm/common/logging.h>
 #include <crm/common/results.h>
 #include <crm/common/strings_internal.h>
 #include <crm/common/xml.h>
+#include <crm/cluster/internal.h>   // pcmk__get_node()
 
 #include "pacemaker-attrd.h"
 
@@ -50,8 +51,10 @@ attrd_cib_updated_cb(const char *event, xmlNode *msg)
 {
     const xmlNode *patchset = NULL;
     const char *client_name = NULL;
+    bool status_changed = false;
 
     if (attrd_shutting_down(true)) {
+        crm_debug("Ignoring CIB change during shutdown");
         return;
     }
 
@@ -59,29 +62,32 @@ attrd_cib_updated_cb(const char *event, xmlNode *msg)
         return;
     }
 
-    if (cib__element_in_patchset(patchset, XML_CIB_TAG_ALERTS)) {
+    if (cib__element_in_patchset(patchset, PCMK_XE_ALERTS)) {
         mainloop_set_trigger(attrd_config_read);
     }
 
-    if (!attrd_election_won()) {
-        // Don't write attributes if we're not the writer
-        return;
-    }
+    status_changed = cib__element_in_patchset(patchset, PCMK_XE_STATUS);
 
-    client_name = crm_element_value(msg, F_CIB_CLIENTNAME);
+    client_name = crm_element_value(msg, PCMK__XA_CIB_CLIENTNAME);
     if (!cib__client_triggers_refresh(client_name)) {
-        // The CIB is still accurate
+        /* This change came from a source that ensured the CIB is consistent
+         * with our attributes table, so we don't need to write anything out.
+         */
         return;
     }
 
-    if (cib__element_in_patchset(patchset, XML_CIB_TAG_NODES)
-        || cib__element_in_patchset(patchset, XML_CIB_TAG_STATUS)) {
+    if (!attrd_election_won()) {
+        // Don't write attributes if we're not the writer
+        return;
+    }
 
-        /* An unsafe client modified the nodes or status section. Write
-         * transient attributes to ensure they're up-to-date in the CIB.
+    if (status_changed || cib__element_in_patchset(patchset, PCMK_XE_NODES)) {
+        /* An unsafe client modified the PCMK_XE_NODES or PCMK_XE_STATUS
+         * section. Write transient attributes to ensure they're up-to-date in
+         * the CIB.
          */
         if (client_name == NULL) {
-            client_name = crm_element_value(msg, F_CIB_CLIENTID);
+            client_name = crm_element_value(msg, PCMK__XA_CIB_CLIENTID);
         }
         crm_notice("Updating all attributes after %s event triggered by %s",
                    event, pcmk__s(client_name, "(unidentified client)"));
@@ -108,7 +114,7 @@ attrd_cib_connect(int max_retry)
         }
         attempts++;
         crm_debug("Connection attempt %d to the CIB manager", attempts);
-        rc = the_cib->cmds->signon(the_cib, T_ATTRD, cib_command);
+        rc = the_cib->cmds->signon(the_cib, PCMK__VALUE_ATTRD, cib_command);
 
     } while ((rc != pcmk_ok) && (attempts < max_retry));
 
@@ -126,7 +132,8 @@ attrd_cib_connect(int max_retry)
         goto cleanup;
     }
 
-    rc = the_cib->cmds->add_notify_callback(the_cib, T_CIB_DIFF_NOTIFY,
+    rc = the_cib->cmds->add_notify_callback(the_cib,
+                                            PCMK__VALUE_CIB_DIFF_NOTIFY,
                                             attrd_cib_updated_cb);
     if (rc != pcmk_ok) {
         crm_err("Could not set CIB notification callback");
@@ -144,7 +151,7 @@ void
 attrd_cib_disconnect(void)
 {
     CRM_CHECK(the_cib != NULL, return);
-    the_cib->cmds->del_notify_callback(the_cib, T_CIB_DIFF_NOTIFY,
+    the_cib->cmds->del_notify_callback(the_cib, PCMK__VALUE_CIB_DIFF_NOTIFY,
                                        attrd_cib_updated_cb);
     cib__clean_up_connection(&the_cib);
 }
@@ -153,39 +160,44 @@ static void
 attrd_erase_cb(xmlNode *msg, int call_id, int rc, xmlNode *output,
                void *user_data)
 {
-    do_crm_log_unlikely(((rc != pcmk_ok)? LOG_NOTICE : LOG_DEBUG),
-                        "Cleared transient attributes: %s "
-                        CRM_XS " xpath=%s rc=%d",
-                        pcmk_strerror(rc), (char *) user_data, rc);
+    const char *node = pcmk__s((const char *) user_data, "a node");
+
+    if (rc == pcmk_ok) {
+        crm_info("Cleared transient node attributes for %s from CIB", node);
+    } else {
+        crm_err("Unable to clear transient node attributes for %s from CIB: %s",
+                node, pcmk_strerror(rc));
+    }
 }
 
-#define XPATH_TRANSIENT "//node_state[@uname='%s']/" XML_TAG_TRANSIENT_NODEATTRS
+#define XPATH_TRANSIENT "//" PCMK__XE_NODE_STATE    \
+                        "[@" PCMK_XA_UNAME "='%s']" \
+                        "/" PCMK__XE_TRANSIENT_ATTRIBUTES
 
 /*!
  * \internal
- * \brief Wipe all transient attributes for this node from the CIB
- *
- * Clear any previous transient node attributes from the CIB. This is
- * normally done by the DC's controller when this node leaves the cluster, but
- * this handles the case where the node restarted so quickly that the
- * cluster layer didn't notice.
+ * \brief Wipe all transient node attributes for a node from the CIB
  *
- * \todo If pacemaker-attrd respawns after crashing (see PCMK_ENV_RESPAWNED),
- *       ideally we'd skip this and sync our attributes from the writer.
- *       However, currently we reject any values for us that the writer has, in
- *       attrd_peer_update().
+ * \param[in] node  Node to clear attributes for
  */
-static void
-attrd_erase_attrs(void)
+void
+attrd_cib_erase_transient_attrs(const char *node)
 {
     int call_id = 0;
-    char *xpath = crm_strdup_printf(XPATH_TRANSIENT, attrd_cluster->uname);
+    char *xpath = NULL;
+
+    CRM_CHECK(node != NULL, return);
+
+    xpath = crm_strdup_printf(XPATH_TRANSIENT, node);
 
-    crm_info("Clearing transient attributes from CIB " CRM_XS " xpath=%s",
-             xpath);
+    crm_debug("Clearing transient node attributes for %s from CIB using %s",
+              node, xpath);
 
     call_id = the_cib->cmds->remove(the_cib, xpath, NULL, cib_xpath);
-    the_cib->cmds->register_callback_full(the_cib, call_id, 120, FALSE, xpath,
+    free(xpath);
+
+    the_cib->cmds->register_callback_full(the_cib, call_id, 120, FALSE,
+                                          pcmk__str_copy(node),
                                           "attrd_erase_cb", attrd_erase_cb,
                                           free);
 }
@@ -197,8 +209,17 @@ attrd_erase_attrs(void)
 void
 attrd_cib_init(void)
 {
-    // We have no attribute values in memory, wipe the CIB to match
-    attrd_erase_attrs();
+    /* We have no attribute values in memory, so wipe the CIB to match. This is
+     * normally done by the DC's controller when this node leaves the cluster, but
+     * this handles the case where the node restarted so quickly that the
+     * cluster layer didn't notice.
+     *
+     * \todo If pacemaker-attrd respawns after crashing (see PCMK_ENV_RESPAWNED),
+     *       ideally we'd skip this and sync our attributes from the writer.
+     *       However, currently we reject any values for us that the writer has, in
+     *       attrd_peer_update().
+     */
+    attrd_cib_erase_transient_attrs(attrd_cluster->uname);
 
     // Set a trigger for reading the CIB (for the alerts section)
     attrd_config_read = mainloop_add_trigger(G_PRIORITY_HIGH, attrd_read_options, NULL);
@@ -262,19 +283,24 @@ attrd_cib_callback(xmlNode *msg, int call_id, int rc, xmlNode *output, void *use
 
     g_hash_table_iter_init(&iter, a->values);
     while (g_hash_table_iter_next(&iter, (gpointer *) & peer, (gpointer *) & v)) {
-        do_crm_log(level, "* %s[%s]=%s", a->id, peer, v->requested);
-        free(v->requested);
-        v->requested = NULL;
-        if (rc != pcmk_ok) {
-            a->changed = true; /* Attempt write out again */
+        if (rc == pcmk_ok) {
+            crm_info("* Wrote %s[%s]=%s",
+                     a->id, peer, pcmk__s(v->requested, "(unset)"));
+            pcmk__str_update(&(v->requested), NULL);
+        } else {
+            do_crm_log(level, "* Could not write %s[%s]=%s",
+                       a->id, peer, pcmk__s(v->requested, "(unset)"));
+            /* Reattempt write below if we are still the writer */
+            attrd_set_attr_flags(a, attrd_attr_changed);
         }
     }
 
-    if (a->changed && attrd_election_won()) {
+    if (pcmk_is_set(a->flags, attrd_attr_changed) && attrd_election_won()) {
         if (rc == pcmk_ok) {
             /* We deferred a write of a new update because this update was in
              * progress. Write out the new value without additional delay.
              */
+            crm_debug("Pending update for %s can be written now", a->id);
             write_attribute(a, false);
 
         /* We're re-attempting a write because the original failed; delay
@@ -320,40 +346,27 @@ static int
 add_set_attr_update(const attribute_t *attr, const char *attr_id,
                     const char *node_id, const char *set_id, const char *value)
 {
-    xmlNode *update = create_xml_node(NULL, XML_CIB_TAG_STATE);
+    xmlNode *update = pcmk__xe_create(NULL, PCMK__XE_NODE_STATE);
     xmlNode *child = update;
     int rc = ENOMEM;
 
-    if (child == NULL) {
-        goto done;
-    }
-    crm_xml_add(child, XML_ATTR_ID, node_id);
+    crm_xml_add(child, PCMK_XA_ID, node_id);
 
-    child = create_xml_node(child, XML_TAG_TRANSIENT_NODEATTRS);
-    if (child == NULL) {
-        goto done;
-    }
-    crm_xml_add(child, XML_ATTR_ID, node_id);
+    child = pcmk__xe_create(child, PCMK__XE_TRANSIENT_ATTRIBUTES);
+    crm_xml_add(child, PCMK_XA_ID, node_id);
 
-    child = create_xml_node(child, attr->set_type);
-    if (child == NULL) {
-        goto done;
-    }
-    crm_xml_add(child, XML_ATTR_ID, set_id);
+    child = pcmk__xe_create(child, attr->set_type);
+    crm_xml_add(child, PCMK_XA_ID, set_id);
 
-    child = create_xml_node(child, XML_CIB_TAG_NVPAIR);
-    if (child == NULL) {
-        goto done;
-    }
-    crm_xml_add(child, XML_ATTR_ID, attr_id);
-    crm_xml_add(child, XML_NVPAIR_ATTR_NAME, attr->id);
-    crm_xml_add(child, XML_NVPAIR_ATTR_VALUE, value);
+    child = pcmk__xe_create(child, PCMK_XE_NVPAIR);
+    crm_xml_add(child, PCMK_XA_ID, attr_id);
+    crm_xml_add(child, PCMK_XA_NAME, attr->id);
+    crm_xml_add(child, PCMK_XA_VALUE, value);
 
-    rc = the_cib->cmds->modify(the_cib, XML_CIB_TAG_STATUS, update,
+    rc = the_cib->cmds->modify(the_cib, PCMK_XE_STATUS, update,
                                cib_can_create|cib_transaction);
     rc = pcmk_legacy2rc(rc);
 
-done:
     free_xml(update);
     return rc;
 }
@@ -373,16 +386,16 @@ static int
 add_unset_attr_update(const attribute_t *attr, const char *attr_id,
                       const char *node_id, const char *set_id)
 {
-    char *xpath = crm_strdup_printf("/" XML_TAG_CIB
-                                    "/" XML_CIB_TAG_STATUS
-                                    "/" XML_CIB_TAG_STATE
-                                        "[@" XML_ATTR_ID "='%s']"
-                                    "/" XML_TAG_TRANSIENT_NODEATTRS
-                                        "[@" XML_ATTR_ID "='%s']"
-                                    "/%s[@" XML_ATTR_ID "='%s']"
-                                    "/" XML_CIB_TAG_NVPAIR
-                                        "[@" XML_ATTR_ID "='%s' "
-                                         "and @" XML_NVPAIR_ATTR_NAME "='%s']",
+    char *xpath = crm_strdup_printf("/" PCMK_XE_CIB
+                                    "/" PCMK_XE_STATUS
+                                    "/" PCMK__XE_NODE_STATE
+                                        "[@" PCMK_XA_ID "='%s']"
+                                    "/" PCMK__XE_TRANSIENT_ATTRIBUTES
+                                        "[@" PCMK_XA_ID "='%s']"
+                                    "/%s[@" PCMK_XA_ID "='%s']"
+                                    "/" PCMK_XE_NVPAIR
+                                        "[@" PCMK_XA_ID "='%s' "
+                                         "and @" PCMK_XA_NAME "='%s']",
                                     node_id, node_id, attr->set_type, set_id,
                                     attr_id, attr->id);
 
@@ -406,31 +419,17 @@ add_unset_attr_update(const attribute_t *attr, const char *attr_id,
 static int
 add_attr_update(const attribute_t *attr, const char *value, const char *node_id)
 {
-    char *set_id = NULL;
-    char *attr_id = NULL;
+    char *set_id = attrd_set_id(attr, node_id);
+    char *nvpair_id = attrd_nvpair_id(attr, node_id);
     int rc = pcmk_rc_ok;
 
-    if (attr->set_id != NULL) {
-        pcmk__str_update(&set_id, attr->set_id);
-    } else {
-        set_id = crm_strdup_printf("%s-%s", XML_CIB_TAG_STATUS, node_id);
-    }
-    crm_xml_sanitize_id(set_id);
-
-    if (attr->uuid != NULL) {
-        pcmk__str_update(&attr_id, attr->uuid);
-    } else {
-        attr_id = crm_strdup_printf("%s-%s", set_id, attr->id);
-    }
-    crm_xml_sanitize_id(attr_id);
-
-    if (value != NULL) {
-        rc = add_set_attr_update(attr, attr_id, node_id, set_id, value);
+    if (value == NULL) {
+        rc = add_unset_attr_update(attr, nvpair_id, node_id, set_id);
     } else {
-        rc = add_unset_attr_update(attr, attr_id, node_id, set_id);
+        rc = add_set_attr_update(attr, nvpair_id, node_id, set_id, value);
     }
     free(set_id);
-    free(attr_id);
+    free(nvpair_id);
     return rc;
 }
 
@@ -454,13 +453,11 @@ send_alert_attributes_value(attribute_t *a, GHashTable *t)
 static void
 set_alert_attribute_value(GHashTable *t, attribute_value_t *v)
 {
-    attribute_value_t *a_v = NULL;
-    a_v = calloc(1, sizeof(attribute_value_t));
-    CRM_ASSERT(a_v != NULL);
+    attribute_value_t *a_v = pcmk__assert_alloc(1, sizeof(attribute_value_t));
 
     a_v->nodeid = v->nodeid;
-    a_v->nodename = strdup(v->nodename);
-    pcmk__str_update(&a_v->current, v->current);
+    a_v->nodename = pcmk__str_copy(v->nodename);
+    a_v->current = pcmk__str_copy(v->current);
 
     g_hash_table_replace(t, a_v->nodename, a_v);
 }
@@ -493,7 +490,7 @@ write_attribute(attribute_t *a, bool ignore_delay)
     }
 
     /* If this attribute will be written to the CIB ... */
-    if (!stand_alone && !a->is_private) {
+    if (!stand_alone && !pcmk_is_set(a->flags, attrd_attr_is_private)) {
         /* Defer the write if now's not a good time */
         if (a->update && (a->update < last_cib_op_done)) {
             crm_info("Write out of '%s' continuing: update %d considered lost",
@@ -520,21 +517,17 @@ write_attribute(attribute_t *a, bool ignore_delay)
         the_cib->cmds->set_user(the_cib, a->user);
         rc = the_cib->cmds->init_transaction(the_cib);
         if (rc != pcmk_ok) {
-            crm_err("Failed to write %s (id %s, set %s): Could not initiate "
+            crm_err("Failed to write %s (set %s): Could not initiate "
                     "CIB transaction",
-                    a->id, pcmk__s(a->uuid, "n/a"), pcmk__s(a->set_id, "n/a"));
+                    a->id, pcmk__s(a->set_id, "unspecified"));
             goto done;
         }
     }
 
-    /* Attribute will be written shortly, so clear changed flag */
-    a->changed = false;
-
-    /* We will check all peers' uuids shortly, so initialize this to false */
-    a->unknown_peer_uuids = false;
-
-    /* Attribute will be written shortly, so clear forced write flag */
-    a->force_write = FALSE;
+    /* Attribute will be written shortly, so clear changed flag and force
+     * write flag, and initialize UUID missing flag to false.
+     */
+    attrd_clear_attr_flags(a, attrd_attr_changed|attrd_attr_uuid_missing|attrd_attr_force_write);
 
     /* Make the table for the attribute trap */
     alert_attribute_value = pcmk__strikey_table(NULL,
@@ -543,79 +536,80 @@ write_attribute(attribute_t *a, bool ignore_delay)
     /* Iterate over each peer value of this attribute */
     g_hash_table_iter_init(&iter, a->values);
     while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &v)) {
-        crm_node_t *peer = crm_get_peer_full(v->nodeid, v->nodename,
-                                             CRM_GET_PEER_ANY);
+        const char *uuid = NULL;
 
-        /* If the value's peer info does not correspond to a peer, ignore it */
-        if (peer == NULL) {
-            crm_notice("Cannot update %s[%s]=%s because peer not known",
-                       a->id, v->nodename, v->current);
-            continue;
-        }
+        if (pcmk_is_set(v->flags, attrd_value_remote)) {
+            /* If this is a Pacemaker Remote node, the node's UUID is the same
+             * as its name, which we already have.
+             */
+            uuid = v->nodename;
 
-        /* If we're just learning the peer's node id, remember it */
-        if (peer->id && (v->nodeid == 0)) {
-            crm_trace("Learned ID %u for node %s", peer->id, v->nodename);
-            v->nodeid = peer->id;
+        } else {
+            // This will create a cluster node cache entry if none exists
+            crm_node_t *peer = pcmk__get_node(v->nodeid, v->nodename, NULL,
+                                              pcmk__node_search_any);
+
+            uuid = peer->uuid;
+
+            // Remember peer's node ID if we're just now learning it
+            if ((peer->id != 0) && (v->nodeid == 0)) {
+                crm_trace("Learned ID %u for node %s", peer->id, v->nodename);
+                v->nodeid = peer->id;
+            }
         }
 
         /* If this is a private attribute, no update needs to be sent */
-        if (stand_alone || a->is_private) {
+        if (stand_alone || pcmk_is_set(a->flags, attrd_attr_is_private)) {
             private_updates++;
             continue;
         }
 
-        /* If the peer is found, but its uuid is unknown, defer write */
-        if (peer->uuid == NULL) {
-            a->unknown_peer_uuids = true;
-            crm_notice("Cannot update %s[%s]=%s because peer UUID not known "
-                       "(will retry if learned)",
+        // Defer write if this is a cluster node that's never been seen
+        if (uuid == NULL) {
+            attrd_set_attr_flags(a, attrd_attr_uuid_missing);
+            crm_notice("Cannot update %s[%s]='%s' now because node's UUID is "
+                       "unknown (will retry if learned)",
                        a->id, v->nodename, v->current);
             continue;
         }
 
         // Update this value as part of the CIB transaction we're building
-        rc = add_attr_update(a, v->current, peer->uuid);
+        rc = add_attr_update(a, v->current, uuid);
         if (rc != pcmk_rc_ok) {
-            crm_err("Failed to update %s[%s]=%s (peer known as %s, UUID %s, "
-                    "ID %" PRIu32 "/%" PRIu32 "): %s",
-                    a->id, v->nodename, v->current, peer->uname, peer->uuid,
-                    peer->id, v->nodeid, pcmk_rc_str(rc));
+            crm_err("Failed to update %s[%s]='%s': %s "
+                    CRM_XS " node uuid=%s id=%" PRIu32,
+                    a->id, v->nodename, v->current, pcmk_rc_str(rc),
+                    uuid, v->nodeid);
             continue;
         }
 
-        crm_debug("Updating %s[%s]=%s (peer known as %s, UUID %s, ID "
-                  "%" PRIu32 "/%" PRIu32 ")",
-                  a->id, v->nodename, v->current,
-                  peer->uname, peer->uuid, peer->id, v->nodeid);
+        crm_debug("Writing %s[%s]=%s (node-state-id=%s node-id=%" PRIu32 ")",
+                  a->id, v->nodename, pcmk__s(v->current, "(unset)"),
+                  uuid, v->nodeid);
         cib_updates++;
 
         /* Preservation of the attribute to transmit alert */
         set_alert_attribute_value(alert_attribute_value, v);
 
-        free(v->requested);
-        v->requested = NULL;
-        if (v->current) {
-            v->requested = strdup(v->current);
-        }
+        // Save this value so we can log it when write completes
+        pcmk__str_update(&(v->requested), v->current);
     }
 
     if (private_updates) {
-        crm_info("Processed %d private change%s for %s, id=%s, set=%s",
+        crm_info("Processed %d private change%s for %s (set %s)",
                  private_updates, pcmk__plural_s(private_updates),
-                 a->id, pcmk__s(a->uuid, "n/a"), pcmk__s(a->set_id, "n/a"));
+                 a->id, pcmk__s(a->set_id, "unspecified"));
     }
     if (cib_updates > 0) {
-        char *id = NULL;
+        char *id = pcmk__str_copy(a->id);
 
         // Commit transaction
         a->update = the_cib->cmds->end_transaction(the_cib, true, cib_none);
 
-        crm_info("Sent CIB request %d with %d change%s for %s (id %s, set %s)",
+        crm_info("Sent CIB request %d with %d change%s for %s (set %s)",
                  a->update, cib_updates, pcmk__plural_s(cib_updates),
-                 a->id, pcmk__s(a->uuid, "n/a"), pcmk__s(a->set_id, "n/a"));
+                 a->id, pcmk__s(a->set_id, "unspecified"));
 
-        pcmk__str_update(&id, a->id);
         if (the_cib->cmds->register_callback_full(the_cib, a->update,
                                                   CIB_OP_TIMEOUT_S, FALSE, id,
                                                   "attrd_cib_callback",
@@ -653,18 +647,20 @@ attrd_write_attributes(uint32_t options)
               pcmk_is_set(options, attrd_write_all)? "all" : "changed");
     g_hash_table_iter_init(&iter, attributes);
     while (g_hash_table_iter_next(&iter, NULL, (gpointer *) & a)) {
-        if (!pcmk_is_set(options, attrd_write_all) && a->unknown_peer_uuids) {
+        if (!pcmk_is_set(options, attrd_write_all) &&
+            pcmk_is_set(a->flags, attrd_attr_uuid_missing)) {
             // Try writing this attribute again, in case peer ID was learned
-            a->changed = true;
-        } else if (a->force_write) {
+            attrd_set_attr_flags(a, attrd_attr_changed);
+        } else if (pcmk_is_set(a->flags, attrd_attr_force_write)) {
             /* If the force_write flag is set, write the attribute. */
-            a->changed = true;
+            attrd_set_attr_flags(a, attrd_attr_changed);
         }
 
-        if (pcmk_is_set(options, attrd_write_all) || a->changed) {
+        if (pcmk_is_set(options, attrd_write_all) ||
+            pcmk_is_set(a->flags, attrd_attr_changed)) {
             bool ignore_delay = pcmk_is_set(options, attrd_write_no_delay);
 
-            if (a->force_write) {
+            if (pcmk_is_set(a->flags, attrd_attr_force_write)) {
                 // Always ignore delay when forced write flag is set
                 ignore_delay = true;
             }
diff --git a/daemons/attrd/attrd_corosync.c b/daemons/attrd/attrd_corosync.c
index 86dc67b..fb3b4e5 100644
--- a/daemons/attrd/attrd_corosync.c
+++ b/daemons/attrd/attrd_corosync.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2023 the Pacemaker project contributors
+ * Copyright 2013-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -19,19 +19,19 @@
 #include <crm/common/logging.h>
 #include <crm/common/results.h>
 #include <crm/common/strings_internal.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 
 #include "pacemaker-attrd.h"
 
 static xmlNode *
 attrd_confirmation(int callid)
 {
-    xmlNode *node = create_xml_node(NULL, __func__);
+    xmlNode *node = pcmk__xe_create(NULL, __func__);
 
-    crm_xml_add(node, F_TYPE, T_ATTRD);
-    crm_xml_add(node, F_ORIG, get_local_node_name());
-    crm_xml_add(node, PCMK__XA_TASK, PCMK__ATTRD_CMD_CONFIRM);
-    crm_xml_add_int(node, XML_LRM_ATTR_CALLID, callid);
+    crm_xml_add(node, PCMK__XA_T, PCMK__VALUE_ATTRD);
+    crm_xml_add(node, PCMK__XA_SRC, pcmk__cluster_local_node_name());
+    crm_xml_add(node, PCMK_XA_TASK, PCMK__ATTRD_CMD_CONFIRM);
+    crm_xml_add_int(node, PCMK__XA_CALL_ID, callid);
 
     return node;
 }
@@ -39,7 +39,7 @@ attrd_confirmation(int callid)
 static void
 attrd_peer_message(crm_node_t *peer, xmlNode *xml)
 {
-    const char *election_op = crm_element_value(xml, F_CRM_TASK);
+    const char *election_op = crm_element_value(xml, PCMK__XA_CRM_TASK);
 
     if (election_op) {
         attrd_handle_election_op(peer, xml);
@@ -64,7 +64,7 @@ attrd_peer_message(crm_node_t *peer, xmlNode *xml)
             .result         = PCMK__UNKNOWN_RESULT,
         };
 
-        request.op = crm_element_value_copy(request.xml, PCMK__XA_TASK);
+        request.op = crm_element_value_copy(request.xml, PCMK_XA_TASK);
         CRM_CHECK(request.op != NULL, return);
 
         attrd_handle_request(&request);
@@ -81,7 +81,7 @@ attrd_peer_message(crm_node_t *peer, xmlNode *xml)
              * response so the originating peer knows what they're a confirmation
              * for.
              */
-            crm_element_value_int(xml, XML_LRM_ATTR_CALLID, &callid);
+            crm_element_value_int(xml, PCMK__XA_CALL_ID, &callid);
             reply = attrd_confirmation(callid);
 
             /* And then send the confirmation back to the originating peer.  This
@@ -106,22 +106,22 @@ attrd_cpg_dispatch(cpg_handle_t handle,
     uint32_t kind = 0;
     xmlNode *xml = NULL;
     const char *from = NULL;
-    char *data = pcmk_message_common_cs(handle, nodeid, pid, msg, &kind, &from);
+    char *data = pcmk__cpg_message_data(handle, nodeid, pid, msg, &kind, &from);
 
     if(data == NULL) {
         return;
     }
 
     if (kind == crm_class_cluster) {
-        xml = string2xml(data);
+        xml = pcmk__xml_parse(data);
     }
 
     if (xml == NULL) {
         crm_err("Bad message of class %d received from %s[%u]: '%.120s'", kind, from, nodeid, data);
     } else {
-        crm_node_t *peer = crm_get_peer(nodeid, from);
-
-        attrd_peer_message(peer, xml);
+        attrd_peer_message(pcmk__get_node(nodeid, from, NULL,
+                                          pcmk__node_search_cluster_member),
+                           xml);
     }
 
     free_xml(xml);
@@ -143,86 +143,24 @@ attrd_cpg_destroy(gpointer unused)
 
 /*!
  * \internal
- * \brief Override an attribute sync with a local value
- *
- * Broadcast the local node's value for an attribute that's different from the
- * value provided in a peer's attribute synchronization response. This ensures a
- * node's values for itself take precedence and all peers are kept in sync.
+ * \brief Broadcast an update for a single attribute value
  *
- * \param[in] a          Attribute entry to override
- *
- * \return Local instance of attribute value
+ * \param[in] a  Attribute to broadcast
+ * \param[in] v  Attribute value to broadcast
  */
-static attribute_value_t *
-broadcast_local_value(const attribute_t *a)
-{
-    attribute_value_t *v = g_hash_table_lookup(a->values, attrd_cluster->uname);
-    xmlNode *sync = create_xml_node(NULL, __func__);
-
-    crm_xml_add(sync, PCMK__XA_TASK, PCMK__ATTRD_CMD_SYNC_RESPONSE);
-    attrd_add_value_xml(sync, a, v, false);
-    attrd_send_message(NULL, sync, false);
-    free_xml(sync);
-    return v;
-}
-
-/*!
- * \internal
- * \brief Ensure a Pacemaker Remote node is in the correct peer cache
- *
- * \param[in] node_name  Name of Pacemaker Remote node to check
- */
-static void
-cache_remote_node(const char *node_name)
+void
+attrd_broadcast_value(const attribute_t *a, const attribute_value_t *v)
 {
-    /* If we previously assumed this node was an unseen cluster node,
-     * remove its entry from the cluster peer cache.
-     */
-    crm_node_t *dup = pcmk__search_cluster_node_cache(0, node_name, NULL);
+    xmlNode *op = pcmk__xe_create(NULL, PCMK_XE_OP);
 
-    if (dup && (dup->uuid == NULL)) {
-        reap_crm_member(0, node_name);
-    }
-
-    // Ensure node is in the remote peer cache
-    CRM_ASSERT(crm_remote_peer_get(node_name) != NULL);
+    crm_xml_add(op, PCMK_XA_TASK, PCMK__ATTRD_CMD_UPDATE);
+    attrd_add_value_xml(op, a, v, false);
+    attrd_send_message(NULL, op, false);
+    free_xml(op);
 }
 
 #define state_text(state) pcmk__s((state), "in unknown state")
 
-/*!
- * \internal
- * \brief Return host's hash table entry (creating one if needed)
- *
- * \param[in,out] values Hash table of values
- * \param[in]     host   Name of peer to look up
- * \param[in]     xml    XML describing the attribute
- *
- * \return Pointer to new or existing hash table entry
- */
-static attribute_value_t *
-attrd_lookup_or_create_value(GHashTable *values, const char *host,
-                             const xmlNode *xml)
-{
-    attribute_value_t *v = g_hash_table_lookup(values, host);
-    int is_remote = 0;
-
-    crm_element_value_int(xml, PCMK__XA_ATTR_IS_REMOTE, &is_remote);
-    if (is_remote) {
-        cache_remote_node(host);
-    }
-
-    if (v == NULL) {
-        v = calloc(1, sizeof(attribute_value_t));
-        CRM_ASSERT(v != NULL);
-
-        pcmk__str_update(&v->nodename, host);
-        v->is_remote = is_remote;
-        g_hash_table_replace(values, v->nodename, v);
-    }
-    return(v);
-}
-
 static void
 attrd_peer_change_cb(enum crm_status_type kind, crm_node_t *peer, const void *data)
 {
@@ -254,7 +192,7 @@ attrd_peer_change_cb(enum crm_status_type kind, crm_node_t *peer, const void *da
                  */
                 if (attrd_election_won()
                     && !pcmk_is_set(peer->flags, crm_remote_node)) {
-                    attrd_peer_sync(peer, NULL);
+                    attrd_peer_sync(peer);
                 }
             } else {
                 // Remove all attribute values associated with lost nodes
@@ -269,17 +207,14 @@ attrd_peer_change_cb(enum crm_status_type kind, crm_node_t *peer, const void *da
         attrd_remove_voter(peer);
         attrd_remove_peer_protocol_ver(peer->uname);
         attrd_do_not_expect_from_peer(peer->uname);
-
-    // Ensure remote nodes that come up are in the remote node cache
-    } else if (!gone && is_remote) {
-        cache_remote_node(peer->uname);
     }
 }
 
 static void
 record_peer_nodeid(attribute_value_t *v, const char *host)
 {
-    crm_node_t *known_peer = crm_get_peer(v->nodeid, host);
+    crm_node_t *known_peer = pcmk__get_node(v->nodeid, host, NULL,
+                                            pcmk__node_search_cluster_member);
 
     crm_trace("Learned %s has node id %s", known_peer->uname, known_peer->uuid);
     if (attrd_election_won()) {
@@ -287,34 +222,63 @@ record_peer_nodeid(attribute_value_t *v, const char *host)
     }
 }
 
+#define readable_value(rv_v) pcmk__s((rv_v)->current, "(unset)")
+
+#define readable_peer(p)    \
+    (((p) == NULL)? "all peers" : pcmk__s((p)->uname, "unknown peer"))
+
 static void
 update_attr_on_host(attribute_t *a, const crm_node_t *peer, const xmlNode *xml,
                     const char *attr, const char *value, const char *host,
-                    bool filter, int is_force_write)
+                    bool filter)
 {
+    int is_remote = 0;
+    bool changed = false;
     attribute_value_t *v = NULL;
 
-    v = attrd_lookup_or_create_value(a->values, host, xml);
+    // Create entry for value if not already existing
+    v = g_hash_table_lookup(a->values, host);
+    if (v == NULL) {
+        v = pcmk__assert_alloc(1, sizeof(attribute_value_t));
+
+        v->nodename = pcmk__str_copy(host);
+        g_hash_table_replace(a->values, v->nodename, v);
+    }
+
+    // If value is for a Pacemaker Remote node, remember that
+    crm_element_value_int(xml, PCMK__XA_ATTR_IS_REMOTE, &is_remote);
+    if (is_remote) {
+        attrd_set_value_flags(v, attrd_value_remote);
+        CRM_ASSERT(pcmk__cluster_lookup_remote_node(host) != NULL);
+    }
 
-    if (filter && !pcmk__str_eq(v->current, value, pcmk__str_casei)
-        && pcmk__str_eq(host, attrd_cluster->uname, pcmk__str_casei)) {
+    // Check whether the value changed
+    changed = !pcmk__str_eq(v->current, value, pcmk__str_casei);
 
+    if (changed && filter && pcmk__str_eq(host, attrd_cluster->uname,
+                                          pcmk__str_casei)) {
+        /* Broadcast the local value for an attribute that differs from the
+         * value provided in a peer's attribute synchronization response. This
+         * ensures a node's values for itself take precedence and all peers are
+         * kept in sync.
+         */
+        v = g_hash_table_lookup(a->values, attrd_cluster->uname);
         crm_notice("%s[%s]: local value '%s' takes priority over '%s' from %s",
-                   attr, host, v->current, value, peer->uname);
-        v = broadcast_local_value(a);
+                   attr, host, readable_value(v), value, peer->uname);
+        attrd_broadcast_value(a, v);
 
-    } else if (!pcmk__str_eq(v->current, value, pcmk__str_casei)) {
+    } else if (changed) {
         crm_notice("Setting %s[%s]%s%s: %s -> %s "
                    CRM_XS " from %s with %s write delay",
                    attr, host, a->set_type ? " in " : "",
-                   pcmk__s(a->set_type, ""), pcmk__s(v->current, "(unset)"),
+                   pcmk__s(a->set_type, ""), readable_value(v),
                    pcmk__s(value, "(unset)"), peer->uname,
                    (a->timeout_ms == 0)? "no" : pcmk__readable_interval(a->timeout_ms));
         pcmk__str_update(&v->current, value);
-        a->changed = true;
+        attrd_set_attr_flags(a, attrd_attr_changed);
 
         if (pcmk__str_eq(host, attrd_cluster->uname, pcmk__str_casei)
-            && pcmk__str_eq(attr, XML_CIB_ATTR_SHUTDOWN, pcmk__str_none)) {
+            && pcmk__str_eq(attr, PCMK__NODE_ATTR_SHUTDOWN, pcmk__str_none)) {
 
             if (!pcmk__str_eq(value, "0", pcmk__str_null_matches)) {
                 attrd_set_requesting_shutdown();
@@ -326,30 +290,37 @@ update_attr_on_host(attribute_t *a, const crm_node_t *peer, const xmlNode *xml,
 
         // Write out new value or start dampening timer
         if (a->timeout_ms && a->timer) {
-            crm_trace("Delayed write out (%dms) for %s", a->timeout_ms, attr);
+            crm_trace("Delaying write of %s %s for dampening",
+                      attr, pcmk__readable_interval(a->timeout_ms));
             mainloop_timer_start(a->timer);
         } else {
             attrd_write_or_elect_attribute(a);
         }
 
     } else {
+        int is_force_write = 0;
+
+        crm_element_value_int(xml, PCMK__XA_ATTRD_IS_FORCE_WRITE,
+                              &is_force_write);
+
         if (is_force_write == 1 && a->timeout_ms && a->timer) {
             /* Save forced writing and set change flag. */
             /* The actual attribute is written by Writer after election. */
-            crm_trace("Unchanged %s[%s] from %s is %s(Set the forced write flag)",
-                      attr, host, peer->uname, value);
-            a->force_write = TRUE;
+            crm_trace("%s[%s] from %s is unchanged (%s), forcing write",
+                      attr, host, peer->uname, pcmk__s(value, "unset"));
+            attrd_set_attr_flags(a, attrd_attr_force_write);
         } else {
-            crm_trace("Unchanged %s[%s] from %s is %s", attr, host, peer->uname, value);
+            crm_trace("%s[%s] from %s is unchanged (%s)",
+                      attr, host, peer->uname, pcmk__s(value, "unset"));
         }
     }
 
-    /* Set the seen flag for attribute processing held only in the own node. */
-    v->seen = TRUE;
+    // This allows us to later detect local values that peer doesn't know about
+    attrd_set_value_flags(v, attrd_value_from_peer);
 
     /* If this is a cluster node whose node ID we are learning, remember it */
-    if ((v->nodeid == 0) && (v->is_remote == FALSE)
-        && (crm_element_value_int(xml, PCMK__XA_ATTR_NODE_ID,
+    if ((v->nodeid == 0) && !pcmk_is_set(v->flags, attrd_value_remote)
+        && (crm_element_value_int(xml, PCMK__XA_ATTR_HOST_ID,
                                   (int*)&v->nodeid) == 0) && (v->nodeid > 0)) {
         record_peer_nodeid(v, host);
     }
@@ -361,16 +332,13 @@ attrd_peer_update_one(const crm_node_t *peer, xmlNode *xml, bool filter)
     attribute_t *a = NULL;
     const char *attr = crm_element_value(xml, PCMK__XA_ATTR_NAME);
     const char *value = crm_element_value(xml, PCMK__XA_ATTR_VALUE);
-    const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
-    int is_force_write = 0;
+    const char *host = crm_element_value(xml, PCMK__XA_ATTR_HOST);
 
     if (attr == NULL) {
         crm_warn("Could not update attribute: peer did not specify name");
         return;
     }
 
-    crm_element_value_int(xml, PCMK__XA_ATTR_FORCE, &is_force_write);
-
     a = attrd_populate_attribute(xml, attr);
     if (a == NULL) {
         return;
@@ -381,16 +349,16 @@ attrd_peer_update_one(const crm_node_t *peer, xmlNode *xml, bool filter)
         GHashTableIter vIter;
 
         crm_debug("Setting %s for all hosts to %s", attr, value);
-        xml_remove_prop(xml, PCMK__XA_ATTR_NODE_ID);
+        pcmk__xe_remove_attr(xml, PCMK__XA_ATTR_HOST_ID);
         g_hash_table_iter_init(&vIter, a->values);
 
         while (g_hash_table_iter_next(&vIter, (gpointer *) & host, NULL)) {
-            update_attr_on_host(a, peer, xml, attr, value, host, filter, is_force_write);
+            update_attr_on_host(a, peer, xml, attr, value, host, filter);
         }
 
     } else {
         // Update attribute value for the given host
-        update_attr_on_host(a, peer, xml, attr, value, host, filter, is_force_write);
+        update_attr_on_host(a, peer, xml, attr, value, host, filter);
     }
 
     /* If this is a message from some attrd instance broadcasting its protocol
@@ -412,13 +380,18 @@ broadcast_unseen_local_values(void)
 
     g_hash_table_iter_init(&aIter, attributes);
     while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
+
         g_hash_table_iter_init(&vIter, a->values);
         while (g_hash_table_iter_next(&vIter, NULL, (gpointer *) & v)) {
-            if (!(v->seen) && pcmk__str_eq(v->nodename, attrd_cluster->uname,
-                                           pcmk__str_casei)) {
+
+            if (!pcmk_is_set(v->flags, attrd_value_from_peer)
+                && pcmk__str_eq(v->nodename, attrd_cluster->uname,
+                                pcmk__str_casei)) {
+                crm_trace("* %s[%s]='%s' is local-only",
+                          a->id, v->nodename, readable_value(v));
                 if (sync == NULL) {
-                    sync = create_xml_node(NULL, __func__);
-                    crm_xml_add(sync, PCMK__XA_TASK, PCMK__ATTRD_CMD_SYNC_RESPONSE);
+                    sync = pcmk__xe_create(NULL, __func__);
+                    crm_xml_add(sync, PCMK_XA_TASK, PCMK__ATTRD_CMD_SYNC_RESPONSE);
                 }
                 attrd_add_value_xml(sync, a, v, a->timeout_ms && a->timer);
             }
@@ -435,17 +408,21 @@ broadcast_unseen_local_values(void)
 int
 attrd_cluster_connect(void)
 {
+    int rc = pcmk_rc_ok;
+
     attrd_cluster = pcmk_cluster_new();
 
-    attrd_cluster->destroy = attrd_cpg_destroy;
-    attrd_cluster->cpg.cpg_deliver_fn = attrd_cpg_dispatch;
-    attrd_cluster->cpg.cpg_confchg_fn = pcmk_cpg_membership;
+    pcmk_cluster_set_destroy_fn(attrd_cluster, attrd_cpg_destroy);
+    pcmk_cpg_set_deliver_fn(attrd_cluster, attrd_cpg_dispatch);
+    pcmk_cpg_set_confchg_fn(attrd_cluster, pcmk__cpg_confchg_cb);
 
-    crm_set_status_callback(&attrd_peer_change_cb);
+    pcmk__cluster_set_status_callback(&attrd_peer_change_cb);
 
-    if (crm_cluster_connect(attrd_cluster) == FALSE) {
+    rc = pcmk_cluster_connect(attrd_cluster);
+    rc = pcmk_rc2legacy(rc);
+    if (rc != pcmk_ok) {
         crm_err("Cluster connection failed");
-        return -ENOTCONN;
+        return rc;
     }
     return pcmk_ok;
 }
@@ -455,15 +432,19 @@ attrd_peer_clear_failure(pcmk__request_t *request)
 {
     xmlNode *xml = request->xml;
     const char *rsc = crm_element_value(xml, PCMK__XA_ATTR_RESOURCE);
-    const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
-    const char *op = crm_element_value(xml, PCMK__XA_ATTR_OPERATION);
-    const char *interval_spec = crm_element_value(xml, PCMK__XA_ATTR_INTERVAL);
-    guint interval_ms = crm_parse_interval_spec(interval_spec);
+    const char *host = crm_element_value(xml, PCMK__XA_ATTR_HOST);
+    const char *op = crm_element_value(xml, PCMK__XA_ATTR_CLEAR_OPERATION);
+    const char *interval_spec = crm_element_value(xml,
+                                                  PCMK__XA_ATTR_CLEAR_INTERVAL);
+    guint interval_ms = 0U;
     char *attr = NULL;
     GHashTableIter iter;
     regex_t regex;
 
-    crm_node_t *peer = crm_get_peer(0, request->peer);
+    crm_node_t *peer = pcmk__get_node(0, request->peer, NULL,
+                                      pcmk__node_search_cluster_member);
+
+    pcmk_parse_interval_spec(interval_spec, &interval_ms);
 
     if (attrd_failure_regex(&regex, rsc, op, interval_ms) != pcmk_ok) {
         crm_info("Ignoring invalid request to clear failures for %s",
@@ -471,10 +452,10 @@ attrd_peer_clear_failure(pcmk__request_t *request)
         return;
     }
 
-    crm_xml_add(xml, PCMK__XA_TASK, PCMK__ATTRD_CMD_UPDATE);
+    crm_xml_add(xml, PCMK_XA_TASK, PCMK__ATTRD_CMD_UPDATE);
 
     /* Make sure value is not set, so we delete */
-    xml_remove_prop(xml, PCMK__XA_ATTR_VALUE);
+    pcmk__xe_remove_attr(xml, PCMK__XA_ATTR_VALUE);
 
     g_hash_table_iter_init(&iter, attributes);
     while (g_hash_table_iter_next(&iter, (gpointer *) &attr, NULL)) {
@@ -492,7 +473,7 @@ attrd_peer_clear_failure(pcmk__request_t *request)
  * \internal
  * \brief Load attributes from a peer sync response
  *
- * \param[in]     peer      Peer that sent clear request
+ * \param[in]     peer      Peer that sent sync response
  * \param[in]     peer_won  Whether peer is the attribute writer
  * \param[in,out] xml       Request XML
  */
@@ -510,11 +491,11 @@ attrd_peer_sync_response(const crm_node_t *peer, bool peer_won, xmlNode *xml)
     }
 
     // Process each attribute update in the sync response
-    for (xmlNode *child = pcmk__xml_first_child(xml); child != NULL;
-         child = pcmk__xml_next(child)) {
+    for (xmlNode *child = pcmk__xe_first_child(xml, NULL, NULL, NULL);
+         child != NULL; child = pcmk__xe_next(child)) {
+
         attrd_peer_update(peer, child,
-                          crm_element_value(child, PCMK__XA_ATTR_NODE_NAME),
-                          true);
+                          crm_element_value(child, PCMK__XA_ATTR_HOST), true);
     }
 
     if (peer_won) {
@@ -540,7 +521,9 @@ attrd_peer_remove(const char *host, bool uncache, const char *source)
     GHashTableIter aIter;
 
     CRM_CHECK(host != NULL, return);
-    crm_notice("Removing all %s attributes for peer %s", host, source);
+    crm_notice("Removing all %s attributes for node %s "
+               CRM_XS " %s reaping node from cache",
+               host, source, (uncache? "and" : "without"));
 
     g_hash_table_iter_init(&aIter, attributes);
     while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
@@ -550,33 +533,40 @@ attrd_peer_remove(const char *host, bool uncache, const char *source)
     }
 
     if (uncache) {
-        crm_remote_peer_cache_remove(host);
-        reap_crm_member(0, host);
+        pcmk__purge_node_from_cache(host, 0);
     }
 }
 
+/*!
+ * \internal
+ * \brief Send all known attributes and values to a peer
+ *
+ * \param[in] peer  Peer to send sync to (if NULL, broadcast to all peers)
+ */
 void
-attrd_peer_sync(crm_node_t *peer, xmlNode *xml)
+attrd_peer_sync(crm_node_t *peer)
 {
     GHashTableIter aIter;
     GHashTableIter vIter;
 
     attribute_t *a = NULL;
     attribute_value_t *v = NULL;
-    xmlNode *sync = create_xml_node(NULL, __func__);
+    xmlNode *sync = pcmk__xe_create(NULL, __func__);
 
-    crm_xml_add(sync, PCMK__XA_TASK, PCMK__ATTRD_CMD_SYNC_RESPONSE);
+    crm_xml_add(sync, PCMK_XA_TASK, PCMK__ATTRD_CMD_SYNC_RESPONSE);
 
     g_hash_table_iter_init(&aIter, attributes);
     while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
         g_hash_table_iter_init(&vIter, a->values);
         while (g_hash_table_iter_next(&vIter, NULL, (gpointer *) & v)) {
-            crm_debug("Syncing %s[%s] = %s to %s", a->id, v->nodename, v->current, peer?peer->uname:"everyone");
+            crm_debug("Syncing %s[%s]='%s' to %s",
+                      a->id, v->nodename, readable_value(v),
+                      readable_peer(peer));
             attrd_add_value_xml(sync, a, v, false);
         }
     }
 
-    crm_debug("Syncing values to %s", peer?peer->uname:"everyone");
+    crm_debug("Syncing values to %s", readable_peer(peer));
     attrd_send_message(peer, sync, false);
     free_xml(sync);
 }
@@ -589,9 +579,10 @@ attrd_peer_update(const crm_node_t *peer, xmlNode *xml, const char *host,
 
     CRM_CHECK((peer != NULL) && (xml != NULL), return);
     if (xml->children != NULL) {
-        for (xmlNode *child = first_named_child(xml, XML_ATTR_OP); child != NULL;
-             child = crm_next_same_xml(child)) {
-            attrd_copy_xml_attributes(xml, child);
+        for (xmlNode *child = pcmk__xe_first_child(xml, PCMK_XE_OP, NULL, NULL);
+             child != NULL; child = pcmk__xe_next_same(child)) {
+
+            pcmk__xe_copy_attrs(child, xml, pcmk__xaf_no_overwrite);
             attrd_peer_update_one(peer, child, filter);
 
             if (attrd_request_has_sync_point(child)) {
diff --git a/daemons/attrd/attrd_elections.c b/daemons/attrd/attrd_elections.c
index 82fbe8a..0abd9c0 100644
--- a/daemons/attrd/attrd_elections.c
+++ b/daemons/attrd/attrd_elections.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2023 the Pacemaker project contributors
+ * Copyright 2013-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -8,9 +8,9 @@
  */
 
 #include <crm_internal.h>
-#include <crm/msg_xml.h>
 #include <crm/cluster.h>
 #include <crm/cluster/election_internal.h>
+#include <crm/common/xml.h>
 
 #include "pacemaker-attrd.h"
 
@@ -23,7 +23,7 @@ attrd_election_cb(gpointer user_data)
     attrd_declare_winner();
 
     /* Update the peers after an election */
-    attrd_peer_sync(NULL, NULL);
+    attrd_peer_sync(NULL);
 
     /* After winning an election, update the CIB with the values of all
      * attributes as the winner knows them.
@@ -35,7 +35,7 @@ attrd_election_cb(gpointer user_data)
 void
 attrd_election_init(void)
 {
-    writer = election_init(T_ATTRD, attrd_cluster->uname, 120000,
+    writer = election_init(PCMK__VALUE_ATTRD, attrd_cluster->uname, 120000,
                            attrd_election_cb);
 }
 
@@ -69,7 +69,7 @@ attrd_handle_election_op(const crm_node_t *peer, xmlNode *xml)
     enum election_result rc = 0;
     enum election_result previous = election_state(writer);
 
-    crm_xml_add(xml, F_CRM_HOST_FROM, peer->uname);
+    crm_xml_add(xml, PCMK__XA_SRC, peer->uname);
 
     // Don't become writer if we're shutting down
     rc = election_count_vote(writer, xml, !attrd_shutting_down(false));
diff --git a/daemons/attrd/attrd_ipc.c b/daemons/attrd/attrd_ipc.c
index 05c4a69..0a2688e 100644
--- a/daemons/attrd/attrd_ipc.c
+++ b/daemons/attrd/attrd_ipc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -16,13 +16,13 @@
 
 #include <crm/cluster.h>
 #include <crm/cluster/internal.h>
-#include <crm/msg_xml.h>
 #include <crm/common/acl_internal.h>
 #include <crm/common/ipc_internal.h>
 #include <crm/common/logging.h>
 #include <crm/common/results.h>
 #include <crm/common/strings_internal.h>
 #include <crm/common/util.h>
+#include <crm/common/xml.h>
 
 #include "pacemaker-attrd.h"
 
@@ -32,22 +32,19 @@ static qb_ipcs_service_t *ipcs = NULL;
  * \internal
  * \brief Build the XML reply to a client query
  *
- * param[in] attr Name of requested attribute
- * param[in] host Name of requested host (or NULL for all hosts)
+ * \param[in] attr Name of requested attribute
+ * \param[in] host Name of requested host (or NULL for all hosts)
  *
  * \return New XML reply
  * \note Caller is responsible for freeing the resulting XML
  */
 static xmlNode *build_query_reply(const char *attr, const char *host)
 {
-    xmlNode *reply = create_xml_node(NULL, __func__);
+    xmlNode *reply = pcmk__xe_create(NULL, __func__);
     attribute_t *a;
 
-    if (reply == NULL) {
-        return NULL;
-    }
-    crm_xml_add(reply, F_TYPE, T_ATTRD);
-    crm_xml_add(reply, F_SUBTYPE, PCMK__ATTRD_CMD_QUERY);
+    crm_xml_add(reply, PCMK__XA_T, PCMK__VALUE_ATTRD);
+    crm_xml_add(reply, PCMK__XA_SUBT, PCMK__ATTRD_CMD_QUERY);
     crm_xml_add(reply, PCMK__XA_ATTR_VERSION, ATTRD_PROTOCOL_VERSION);
 
     /* If desired attribute exists, add its value(s) to the reply */
@@ -67,11 +64,7 @@ static xmlNode *build_query_reply(const char *attr, const char *host)
         /* If a specific node was requested, add its value */
         if (host) {
             v = g_hash_table_lookup(a->values, host);
-            host_value = create_xml_node(reply, XML_CIB_TAG_NODE);
-            if (host_value == NULL) {
-                free_xml(reply);
-                return NULL;
-            }
+            host_value = pcmk__xe_create(reply, PCMK_XE_NODE);
             pcmk__xe_add_node(host_value, host, 0);
             crm_xml_add(host_value, PCMK__XA_ATTR_VALUE,
                         (v? v->current : NULL));
@@ -82,11 +75,7 @@ static xmlNode *build_query_reply(const char *attr, const char *host)
 
             g_hash_table_iter_init(&iter, a->values);
             while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &v)) {
-                host_value = create_xml_node(reply, XML_CIB_TAG_NODE);
-                if (host_value == NULL) {
-                    free_xml(reply);
-                    return NULL;
-                }
+                host_value = pcmk__xe_create(reply, PCMK_XE_NODE);
                 pcmk__xe_add_node(host_value, v->nodename, 0);
                 crm_xml_add(host_value, PCMK__XA_ATTR_VALUE, v->current);
             }
@@ -111,11 +100,11 @@ attrd_client_clear_failure(pcmk__request_t *request)
     }
 
     rsc = crm_element_value(xml, PCMK__XA_ATTR_RESOURCE);
-    op = crm_element_value(xml, PCMK__XA_ATTR_OPERATION);
-    interval_spec = crm_element_value(xml, PCMK__XA_ATTR_INTERVAL);
+    op = crm_element_value(xml, PCMK__XA_ATTR_CLEAR_OPERATION);
+    interval_spec = crm_element_value(xml, PCMK__XA_ATTR_CLEAR_INTERVAL);
 
     /* Map this to an update */
-    crm_xml_add(xml, PCMK__XA_TASK, PCMK__ATTRD_CMD_UPDATE);
+    crm_xml_add(xml, PCMK_XA_TASK, PCMK__ATTRD_CMD_UPDATE);
 
     /* Add regular expression matching desired attributes */
 
@@ -126,22 +115,23 @@ attrd_client_clear_failure(pcmk__request_t *request)
             pattern = crm_strdup_printf(ATTRD_RE_CLEAR_ONE, rsc);
 
         } else {
-            guint interval_ms = crm_parse_interval_spec(interval_spec);
+            guint interval_ms = 0U;
 
+            pcmk_parse_interval_spec(interval_spec, &interval_ms);
             pattern = crm_strdup_printf(ATTRD_RE_CLEAR_OP,
                                         rsc, op, interval_ms);
         }
 
-        crm_xml_add(xml, PCMK__XA_ATTR_PATTERN, pattern);
+        crm_xml_add(xml, PCMK__XA_ATTR_REGEX, pattern);
         free(pattern);
 
     } else {
-        crm_xml_add(xml, PCMK__XA_ATTR_PATTERN, ATTRD_RE_CLEAR_ALL);
+        crm_xml_add(xml, PCMK__XA_ATTR_REGEX, ATTRD_RE_CLEAR_ALL);
     }
 
     /* Make sure attribute and value are not set, so we delete via regex */
-    xml_remove_prop(xml, PCMK__XA_ATTR_NAME);
-    xml_remove_prop(xml, PCMK__XA_ATTR_VALUE);
+    pcmk__xe_remove_attr(xml, PCMK__XA_ATTR_NAME);
+    pcmk__xe_remove_attr(xml, PCMK__XA_ATTR_VALUE);
 
     return attrd_client_update(request);
 }
@@ -152,7 +142,7 @@ attrd_client_peer_remove(pcmk__request_t *request)
     xmlNode *xml = request->xml;
 
     // Host and ID are not used in combination, rather host has precedence
-    const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
+    const char *host = crm_element_value(xml, PCMK__XA_ATTR_HOST);
     char *host_alloc = NULL;
 
     attrd_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags);
@@ -160,18 +150,19 @@ attrd_client_peer_remove(pcmk__request_t *request)
     if (host == NULL) {
         int nodeid = 0;
 
-        crm_element_value_int(xml, PCMK__XA_ATTR_NODE_ID, &nodeid);
+        crm_element_value_int(xml, PCMK__XA_ATTR_HOST_ID, &nodeid);
         if (nodeid > 0) {
-            crm_node_t *node = pcmk__search_cluster_node_cache(nodeid, NULL,
-                                                               NULL);
+            crm_node_t *node = NULL;
             char *host_alloc = NULL;
 
+            node = pcmk__search_node_caches(nodeid, NULL,
+                                            pcmk__node_search_cluster_member);
             if (node && node->uname) {
                 // Use cached name if available
                 host = node->uname;
             } else {
                 // Otherwise ask cluster layer
-                host_alloc = get_node_name(nodeid);
+                host_alloc = pcmk__cluster_node_name(nodeid);
                 host = host_alloc;
             }
             pcmk__xe_add_node(xml, host, 0);
@@ -211,8 +202,8 @@ attrd_client_query(pcmk__request_t *request)
     }
 
     /* Build the XML reply */
-    reply = build_query_reply(attr, crm_element_value(query,
-                                                      PCMK__XA_ATTR_NODE_NAME));
+    reply = build_query_reply(attr,
+                              crm_element_value(query, PCMK__XA_ATTR_HOST));
     if (reply == NULL) {
         pcmk__format_result(&request->result, CRM_EX_ERROR, PCMK_EXEC_ERROR,
                             "Could not respond to query from %s: could not create XML reply",
@@ -241,7 +232,7 @@ attrd_client_refresh(pcmk__request_t *request)
 static void
 handle_missing_host(xmlNode *xml)
 {
-    const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
+    const char *host = crm_element_value(xml, PCMK__XA_ATTR_HOST);
 
     if (host == NULL) {
         crm_trace("Inferring host");
@@ -270,16 +261,16 @@ expand_regexes(xmlNode *xml, const char *attr, const char *value, const char *re
             int status = regexec(&r_patt, attr, 0, NULL, 0);
 
             if (status == 0) {
-                xmlNode *child = create_xml_node(xml, XML_ATTR_OP);
+                xmlNode *child = pcmk__xe_create(xml, PCMK_XE_OP);
 
                 crm_trace("Matched %s with %s", attr, regex);
                 matched = true;
 
-                /* Copy all the attributes from the parent over, but remove the
-                 * regex and replace it with the name.
+                /* Copy all the non-conflicting attributes from the parent over,
+                 * but remove the regex and replace it with the name.
                  */
-                attrd_copy_xml_attributes(xml, child);
-                xml_remove_prop(child, PCMK__XA_ATTR_PATTERN);
+                pcmk__xe_copy_attrs(child, xml, pcmk__xaf_no_overwrite);
+                pcmk__xe_remove_attr(child, PCMK__XA_ATTR_REGEX);
                 crm_xml_add(child, PCMK__XA_ATTR_NAME, attr);
             }
         }
@@ -310,7 +301,7 @@ handle_regexes(pcmk__request_t *request)
 
     const char *attr = crm_element_value(xml, PCMK__XA_ATTR_NAME);
     const char *value = crm_element_value(xml, PCMK__XA_ATTR_VALUE);
-    const char *regex = crm_element_value(xml, PCMK__XA_ATTR_PATTERN);
+    const char *regex = crm_element_value(xml, PCMK__XA_ATTR_REGEX);
 
     rc = expand_regexes(xml, attr, value, regex);
 
@@ -344,7 +335,7 @@ handle_value_expansion(const char **value, xmlNode *xml, const char *op,
         attribute_value_t *v = NULL;
 
         if (a) {
-            const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
+            const char *host = crm_element_value(xml, PCMK__XA_ATTR_HOST);
             v = g_hash_table_lookup(a->values, host);
         }
 
@@ -416,8 +407,10 @@ attrd_client_update(pcmk__request_t *request)
              * we also need to apply all the transformations in this function
              * to the children since they don't happen anywhere else.
              */
-            for (xmlNode *child = first_named_child(xml, XML_ATTR_OP); child != NULL;
-                 child = crm_next_same_xml(child)) {
+            for (xmlNode *child = pcmk__xe_first_child(xml, PCMK_XE_OP, NULL,
+                                                       NULL);
+                 child != NULL; child = pcmk__xe_next_same(child)) {
+
                 attr = crm_element_value(child, PCMK__XA_ATTR_NAME);
                 value = crm_element_value(child, PCMK__XA_ATTR_VALUE);
 
@@ -443,7 +436,7 @@ attrd_client_update(pcmk__request_t *request)
              * up into individual messages and call attrd_client_update on
              * each one.
              */
-            pcmk__xe_foreach_child(xml, XML_ATTR_OP, send_child_update, request);
+            pcmk__xe_foreach_child(xml, PCMK_XE_OP, send_child_update, request);
             request->xml = orig_xml;
         }
 
@@ -452,7 +445,7 @@ attrd_client_update(pcmk__request_t *request)
 
     attr = crm_element_value(xml, PCMK__XA_ATTR_NAME);
     value = crm_element_value(xml, PCMK__XA_ATTR_VALUE);
-    regex = crm_element_value(xml, PCMK__XA_ATTR_PATTERN);
+    regex = crm_element_value(xml, PCMK__XA_ATTR_REGEX);
 
     if (handle_regexes(request) != pcmk_rc_ok) {
         /* Error handling was already dealt with in handle_regexes, so just return. */
@@ -473,7 +466,8 @@ attrd_client_update(pcmk__request_t *request)
         return NULL;
     }
 
-    crm_debug("Broadcasting %s[%s]=%s%s", attr, crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME),
+    crm_debug("Broadcasting %s[%s]=%s%s",
+              attr, crm_element_value(xml, PCMK__XA_ATTR_HOST),
               value, (attrd_election_won()? " (writer)" : ""));
 
     send_update_msg_to_cluster(request, xml);
@@ -498,11 +492,11 @@ attrd_ipc_accept(qb_ipcs_connection_t *c, uid_t uid, gid_t gid)
     if (attrd_shutting_down(false)) {
         crm_info("Ignoring new connection from pid %d during shutdown",
                  pcmk__client_pid(c));
-        return -EPERM;
+        return -ECONNREFUSED;
     }
 
     if (pcmk__new_client(c, uid, gid) == NULL) {
-        return -EIO;
+        return -ENOMEM;
     }
     return pcmk_ok;
 }
@@ -572,7 +566,8 @@ attrd_ipc_dispatch(qb_ipcs_connection_t * c, void *data, size_t size)
 
     if (xml == NULL) {
         crm_debug("Unrecognizable IPC data from PID %d", pcmk__client_pid(c));
-        pcmk__ipc_send_ack(client, id, flags, "ack", NULL, CRM_EX_PROTOCOL);
+        pcmk__ipc_send_ack(client, id, flags, PCMK__XE_ACK, NULL,
+                           CRM_EX_PROTOCOL);
         return 0;
 
     } else {
@@ -589,7 +584,7 @@ attrd_ipc_dispatch(qb_ipcs_connection_t * c, void *data, size_t size)
         CRM_ASSERT(client->user != NULL);
         pcmk__update_acl_user(xml, PCMK__XA_ATTR_USER, client->user);
 
-        request.op = crm_element_value_copy(request.xml, PCMK__XA_TASK);
+        request.op = crm_element_value_copy(request.xml, PCMK_XA_TASK);
         CRM_CHECK(request.op != NULL, return 0);
 
         attrd_handle_request(&request);
diff --git a/daemons/attrd/attrd_messages.c b/daemons/attrd/attrd_messages.c
index 89da6d8..edb33a5 100644
--- a/daemons/attrd/attrd_messages.c
+++ b/daemons/attrd/attrd_messages.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 the Pacemaker project contributors
+ * Copyright 2022-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -12,7 +12,8 @@
 #include <glib.h>
 
 #include <crm/common/messages_internal.h>
-#include <crm/msg_xml.h>
+#include <crm/cluster/internal.h>   // pcmk__get_node()
+#include <crm/common/xml.h>
 
 #include "pacemaker-attrd.h"
 
@@ -30,7 +31,7 @@ static int
 remove_sync_point_attribute(xmlNode *xml, void *data)
 {
     pcmk__xe_remove_matching_attrs(xml, is_sync_point_attr, NULL);
-    pcmk__xe_foreach_child(xml, XML_ATTR_OP, remove_sync_point_attribute, NULL);
+    pcmk__xe_foreach_child(xml, PCMK_XE_OP, remove_sync_point_attribute, NULL);
     return pcmk_rc_ok;
 }
 
@@ -105,7 +106,8 @@ handle_confirm_request(pcmk__request_t *request)
 
         crm_debug("Received confirmation from %s", request->peer);
 
-        if (crm_element_value_int(request->xml, XML_LRM_ATTR_CALLID, &callid) == -1) {
+        if (crm_element_value_int(request->xml, PCMK__XA_CALL_ID,
+                                  &callid) == -1) {
             pcmk__set_result(&request->result, CRM_EX_PROTOCOL, PCMK_EXEC_INVALID,
                              "Could not get callid from XML");
         } else {
@@ -147,8 +149,14 @@ static xmlNode *
 handle_remove_request(pcmk__request_t *request)
 {
     if (request->peer != NULL) {
-        const char *host = crm_element_value(request->xml, PCMK__XA_ATTR_NODE_NAME);
-        attrd_peer_remove(host, true, request->peer);
+        const char *host = crm_element_value(request->xml, PCMK__XA_ATTR_HOST);
+        bool reap = false;
+
+        if (pcmk__xe_get_bool_attr(request->xml, PCMK__XA_REAP,
+                                   &reap) != pcmk_rc_ok) {
+            reap = true; // Default to true for backward compatibility
+        }
+        attrd_peer_remove(host, reap, request->peer);
         pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
         return NULL;
     } else {
@@ -167,27 +175,14 @@ handle_refresh_request(pcmk__request_t *request)
 }
 
 static xmlNode *
-handle_sync_request(pcmk__request_t *request)
-{
-    if (request->peer != NULL) {
-        crm_node_t *peer = crm_get_peer(0, request->peer);
-
-        attrd_peer_sync(peer, request->xml);
-        pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
-        return NULL;
-    } else {
-        return handle_unknown_request(request);
-    }
-}
-
-static xmlNode *
 handle_sync_response_request(pcmk__request_t *request)
 {
     if (request->ipc_client != NULL) {
         return handle_unknown_request(request);
     } else {
         if (request->peer != NULL) {
-            crm_node_t *peer = crm_get_peer(0, request->peer);
+            crm_node_t *peer = pcmk__get_node(0, request->peer, NULL,
+                                              pcmk__node_search_cluster_member);
             bool peer_won = attrd_check_for_new_writer(peer, request->xml);
 
             if (!pcmk__str_eq(peer->uname, attrd_cluster->uname, pcmk__str_casei)) {
@@ -204,8 +199,9 @@ static xmlNode *
 handle_update_request(pcmk__request_t *request)
 {
     if (request->peer != NULL) {
-        const char *host = crm_element_value(request->xml, PCMK__XA_ATTR_NODE_NAME);
-        crm_node_t *peer = crm_get_peer(0, request->peer);
+        const char *host = crm_element_value(request->xml, PCMK__XA_ATTR_HOST);
+        crm_node_t *peer = pcmk__get_node(0, request->peer, NULL,
+                                          pcmk__node_search_cluster_member);
 
         attrd_peer_update(peer, request->xml, host, false);
         pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
@@ -251,7 +247,6 @@ attrd_register_handlers(void)
         { PCMK__ATTRD_CMD_PEER_REMOVE, handle_remove_request },
         { PCMK__ATTRD_CMD_QUERY, handle_query_request },
         { PCMK__ATTRD_CMD_REFRESH, handle_refresh_request },
-        { PCMK__ATTRD_CMD_SYNC, handle_sync_request },
         { PCMK__ATTRD_CMD_SYNC_RESPONSE, handle_sync_response_request },
         { PCMK__ATTRD_CMD_UPDATE, handle_update_request },
         { PCMK__ATTRD_CMD_UPDATE_DELAY, handle_update_request },
@@ -323,11 +318,11 @@ attrd_handle_request(pcmk__request_t *request)
 void
 attrd_broadcast_protocol(void)
 {
-    xmlNode *attrd_op = create_xml_node(NULL, __func__);
+    xmlNode *attrd_op = pcmk__xe_create(NULL, __func__);
 
-    crm_xml_add(attrd_op, F_TYPE, T_ATTRD);
-    crm_xml_add(attrd_op, F_ORIG, crm_system_name);
-    crm_xml_add(attrd_op, PCMK__XA_TASK, PCMK__ATTRD_CMD_UPDATE);
+    crm_xml_add(attrd_op, PCMK__XA_T, PCMK__VALUE_ATTRD);
+    crm_xml_add(attrd_op, PCMK__XA_SRC, crm_system_name);
+    crm_xml_add(attrd_op, PCMK_XA_TASK, PCMK__ATTRD_CMD_UPDATE);
     crm_xml_add(attrd_op, PCMK__XA_ATTR_NAME, CRM_ATTR_PROTOCOL);
     crm_xml_add(attrd_op, PCMK__XA_ATTR_VALUE, ATTRD_PROTOCOL_VERSION);
     crm_xml_add_int(attrd_op, PCMK__XA_ATTR_IS_PRIVATE, 1);
@@ -344,9 +339,9 @@ attrd_broadcast_protocol(void)
 gboolean
 attrd_send_message(crm_node_t *node, xmlNode *data, bool confirm)
 {
-    const char *op = crm_element_value(data, PCMK__XA_TASK);
+    const char *op = crm_element_value(data, PCMK_XA_TASK);
 
-    crm_xml_add(data, F_TYPE, T_ATTRD);
+    crm_xml_add(data, PCMK__XA_T, PCMK__VALUE_ATTRD);
     crm_xml_add(data, PCMK__XA_ATTR_VERSION, ATTRD_PROTOCOL_VERSION);
 
     /* Request a confirmation from the destination peer node (which could
@@ -358,5 +353,5 @@ attrd_send_message(crm_node_t *node, xmlNode *data, bool confirm)
     }
 
     attrd_xml_add_writer(data);
-    return send_cluster_message(node, crm_msg_attrd, data, TRUE);
+    return pcmk__cluster_send_message(node, crm_msg_attrd, data);
 }
diff --git a/daemons/attrd/attrd_sync.c b/daemons/attrd/attrd_sync.c
index 1a6c24c..de99db2 100644
--- a/daemons/attrd/attrd_sync.c
+++ b/daemons/attrd/attrd_sync.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2023 the Pacemaker project contributors
+ * Copyright 2022-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -9,8 +9,8 @@
 
 #include <crm_internal.h>
 
-#include <crm/msg_xml.h>
-#include <crm/common/attrd_internal.h>
+#include <crm/common/xml.h>
+#include <crm/common/attrs_internal.h>
 
 #include "pacemaker-attrd.h"
 
@@ -113,7 +113,7 @@ sync_point_str(enum attrd_sync_point sync_point)
     } else if  (sync_point == attrd_sync_point_cluster) {
         return PCMK__VALUE_CLUSTER;
     } else {
-        return "unknown";
+        return PCMK_VALUE_UNKNOWN;
     }
 }
 
@@ -145,13 +145,7 @@ attrd_add_client_to_waitlist(pcmk__request_t *request)
         waitlist = pcmk__intkey_table(free_waitlist_node);
     }
 
-    wl = calloc(sizeof(struct waitlist_node), 1);
-
-    CRM_ASSERT(wl != NULL);
-
-    wl->client_id = strdup(request->ipc_client->id);
-
-    CRM_ASSERT(wl->client_id);
+    wl = pcmk__assert_alloc(1, sizeof(struct waitlist_node));
 
     if (pcmk__str_eq(sync_point, PCMK__VALUE_LOCAL, pcmk__str_none)) {
         wl->sync_point = attrd_sync_point_local;
@@ -162,6 +156,7 @@ attrd_add_client_to_waitlist(pcmk__request_t *request)
         return;
     }
 
+    wl->client_id = pcmk__str_copy(request->ipc_client->id);
     wl->ipc_id = request->ipc_id;
     wl->flags = request->flags;
 
@@ -175,7 +170,7 @@ attrd_add_client_to_waitlist(pcmk__request_t *request)
     /* And then add the key to the request XML so we can uniquely identify
      * it when it comes time to issue the ACK.
      */
-    crm_xml_add_int(request->xml, XML_LRM_ATTR_CALLID, waitlist_client);
+    crm_xml_add_int(request->xml, PCMK__XA_CALL_ID, waitlist_client);
 }
 
 /*!
@@ -245,7 +240,7 @@ attrd_ack_waitlist_clients(enum attrd_sync_point sync_point, const xmlNode *xml)
         return;
     }
 
-    if (crm_element_value_int(xml, XML_LRM_ATTR_CALLID, &callid) == -1) {
+    if (crm_element_value_int(xml, PCMK__XA_CALL_ID, &callid) == -1) {
         crm_warn("Could not get callid from request XML");
         return;
     }
@@ -316,7 +311,8 @@ attrd_request_sync_point(xmlNode *xml)
     CRM_CHECK(xml != NULL, return NULL);
 
     if (xml->children != NULL) {
-        xmlNode *child = pcmk__xe_match(xml, XML_ATTR_OP, PCMK__XA_ATTR_SYNC_POINT, NULL);
+        xmlNode *child = pcmk__xe_first_child(xml, PCMK_XE_OP,
+                                              PCMK__XA_ATTR_SYNC_POINT, NULL);
 
         if (child) {
             return crm_element_value(child, PCMK__XA_ATTR_SYNC_POINT);
@@ -381,8 +377,10 @@ confirmation_timeout_cb(gpointer data)
             }
 
             crm_trace("Timed out waiting for confirmations for client %s", client->id);
-            pcmk__ipc_send_ack(client, action->ipc_id, action->flags | crm_ipc_client_response,
-                               "ack", ATTRD_PROTOCOL_VERSION, CRM_EX_TIMEOUT);
+            pcmk__ipc_send_ack(client, action->ipc_id,
+                               action->flags|crm_ipc_client_response,
+                               PCMK__XE_ACK, ATTRD_PROTOCOL_VERSION,
+                               CRM_EX_TIMEOUT);
 
             g_hash_table_iter_remove(&iter);
             crm_trace("%d requests now in expected confirmations table", g_hash_table_size(expected_confirmations));
@@ -486,7 +484,7 @@ attrd_expect_confirmations(pcmk__request_t *request, attrd_confirmation_action_f
         expected_confirmations = pcmk__intkey_table((GDestroyNotify) free_action);
     }
 
-    if (crm_element_value_int(request->xml, XML_LRM_ATTR_CALLID, &callid) == -1) {
+    if (crm_element_value_int(request->xml, PCMK__XA_CALL_ID, &callid) == -1) {
         crm_err("Could not get callid from xml");
         return;
     }
@@ -499,23 +497,17 @@ attrd_expect_confirmations(pcmk__request_t *request, attrd_confirmation_action_f
     g_hash_table_iter_init(&iter, peer_protocol_vers);
     while (g_hash_table_iter_next(&iter, &host, &ver)) {
         if (ATTRD_SUPPORTS_CONFIRMATION(GPOINTER_TO_INT(ver))) {
-            char *s = strdup((char *) host);
-
-            CRM_ASSERT(s != NULL);
-            respondents = g_list_prepend(respondents, s);
+            respondents = g_list_prepend(respondents,
+                                         pcmk__str_copy((char *) host));
         }
     }
 
-    action = calloc(1, sizeof(struct confirmation_action));
-    CRM_ASSERT(action != NULL);
+    action = pcmk__assert_alloc(1, sizeof(struct confirmation_action));
 
     action->respondents = respondents;
     action->fn = fn;
-    action->xml = copy_xml(request->xml);
-
-    action->client_id = strdup(request->ipc_client->id);
-    CRM_ASSERT(action->client_id != NULL);
-
+    action->xml = pcmk__xml_copy(NULL, request->xml);
+    action->client_id = pcmk__str_copy(request->ipc_client->id);
     action->ipc_id = request->ipc_id;
     action->flags = request->flags;
 
diff --git a/daemons/attrd/attrd_utils.c b/daemons/attrd/attrd_utils.c
index 341ee1a..2d0bc76 100644
--- a/daemons/attrd/attrd_utils.c
+++ b/daemons/attrd/attrd_utils.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -19,7 +19,7 @@
 #include <crm/crm.h>
 #include <crm/common/ipc_internal.h>
 #include <crm/common/mainloop.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 
 #include "pacemaker-attrd.h"
 
@@ -58,11 +58,12 @@ attrd_clear_requesting_shutdown(void)
  * \internal
  * \brief Check whether local attribute manager is shutting down
  *
- * \param[in] if_requested  Also consider presence of "shutdown" attribute
+ * \param[in] if_requested  If \c true, also consider presence of
+ *                          \c PCMK__NODE_ATTR_SHUTDOWN attribute
  *
  * \return \c true if local attribute manager has begun shutdown sequence
  *         or (if \p if_requested is \c true) whether local node has a nonzero
- *         "shutdown" attribute set, otherwise \c false
+ *         \c PCMK__NODE_ATTR_SHUTDOWN attribute set, otherwise \c false
  * \note Most callers should pass \c false for \p if_requested, because the
  *       attribute manager needs to continue performing while the controller is
  *       shutting down, and even needs to be eligible for election in case all
@@ -175,8 +176,8 @@ attrd_expand_value(const char *value, const char *old_value)
     }
     int_value += offset;
 
-    if (int_value > INFINITY) {
-        int_value = INFINITY;
+    if (int_value > PCMK_SCORE_INFINITY) {
+        int_value = PCMK_SCORE_INFINITY;
     }
     return int_value;
 }
@@ -204,7 +205,7 @@ attrd_failure_regex(regex_t *regex, const char *rsc, const char *op,
     /* Create a pattern that matches desired attributes */
 
     if (rsc == NULL) {
-        pattern = strdup(ATTRD_RE_CLEAR_ALL);
+        pattern = pcmk__str_copy(ATTRD_RE_CLEAR_ALL);
     } else if (op == NULL) {
         pattern = crm_strdup_printf(ATTRD_RE_CLEAR_ONE, rsc);
     } else {
@@ -238,7 +239,6 @@ attrd_free_attribute(gpointer data)
         free(a->id);
         free(a->set_id);
         free(a->set_type);
-        free(a->uuid);
         free(a->user);
 
         mainloop_timer_del(a->timer);
@@ -288,11 +288,9 @@ attrd_update_minimum_protocol_ver(const char *host, const char *value)
     pcmk__scan_min_int(value, &ver, 0);
 
     if (ver > 0) {
-        char *host_name = strdup(host);
-
         /* Record the peer attrd's protocol version. */
-        CRM_ASSERT(host_name != NULL);
-        g_hash_table_insert(peer_protocol_vers, host_name, GINT_TO_POINTER(ver));
+        g_hash_table_insert(peer_protocol_vers, pcmk__str_copy(host),
+                            GINT_TO_POINTER(ver));
 
         /* If the protocol version is a new minimum, record it as such. */
         if (minimum_protocol_version == -1 || ver < minimum_protocol_version) {
@@ -302,24 +300,3 @@ attrd_update_minimum_protocol_ver(const char *host, const char *value)
         }
     }
 }
-
-void
-attrd_copy_xml_attributes(xmlNode *src, xmlNode *dest)
-{
-    /* Copy attributes from the wrapper parent node into the child node.
-     * We can't just use copy_in_properties because we want to skip any
-     * attributes that are already set on the child.  For instance, if
-     * we were told to use a specific node, there will already be a node
-     * attribute on the child.  Copying the parent's node attribute over
-     * could result in the wrong value.
-     */
-    for (xmlAttrPtr a = pcmk__xe_first_attr(src); a != NULL; a = a->next) {
-        const char *p_name = (const char *) a->name;
-        const char *p_value = ((a == NULL) || (a->children == NULL)) ? NULL :
-                              (const char *) a->children->content;
-
-        if (crm_element_value(dest, p_name) == NULL) {
-            crm_xml_add(dest, p_name, p_value);
-        }
-    }
-}
diff --git a/daemons/attrd/pacemaker-attrd.c b/daemons/attrd/pacemaker-attrd.c
index 8091c5b..4ae5c8a 100644
--- a/daemons/attrd/pacemaker-attrd.c
+++ b/daemons/attrd/pacemaker-attrd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2023 the Pacemaker project contributors
+ * Copyright 2013-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -20,8 +20,6 @@
 #include <fcntl.h>
 
 #include <crm/crm.h>
-#include <crm/cib/internal.h>
-#include <crm/msg_xml.h>
 #include <crm/pengine/rules.h>
 #include <crm/common/cmdline_internal.h>
 #include <crm/common/iso8601.h>
@@ -31,7 +29,7 @@
 #include <crm/common/xml.h>
 #include <crm/cluster/internal.h>
 
-#include <crm/common/attrd_internal.h>
+#include <crm/common/attrs_internal.h>
 #include "pacemaker-attrd.h"
 
 #define SUMMARY "daemon for managing Pacemaker node attributes"
@@ -59,7 +57,7 @@ static pcmk__supported_format_t formats[] = {
 };
 
 lrmd_t *the_lrmd = NULL;
-crm_cluster_t *attrd_cluster = NULL;
+pcmk_cluster_t *attrd_cluster = NULL;
 crm_trigger_t *attrd_config_read = NULL;
 crm_exit_t attrd_exit_status = CRM_EX_OK;
 
@@ -136,7 +134,7 @@ main(int argc, char **argv)
     // Open additional log files
     pcmk__add_logfiles(log_files, out);
 
-    crm_log_init(T_ATTRD, LOG_INFO, TRUE, FALSE, argc, argv, FALSE);
+    crm_log_init(PCMK__VALUE_ATTRD, LOG_INFO, TRUE, FALSE, argc, argv, FALSE);
     crm_notice("Starting Pacemaker node attribute manager%s",
                stand_alone ? " in standalone mode" : "");
 
diff --git a/daemons/attrd/pacemaker-attrd.h b/daemons/attrd/pacemaker-attrd.h
index b8929a7..76faf04 100644
--- a/daemons/attrd/pacemaker-attrd.h
+++ b/daemons/attrd/pacemaker-attrd.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2023 the Pacemaker project contributors
+ * Copyright 2013-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -16,7 +16,7 @@
 #include <crm/cluster.h>
 #include <crm/cluster/election_internal.h>
 #include <crm/common/messages_internal.h>
-#include <crm/cib/internal.h>
+#include <crm/cib/cib_types.h>
 
 /*
  * Legacy attrd (all pre-1.1.11 Pacemaker versions, plus all versions when used
@@ -31,9 +31,8 @@
  * --------  ---------  -------------------
  *     1       1.1.11   PCMK__ATTRD_CMD_UPDATE (PCMK__XA_ATTR_NAME only),
  *                      PCMK__ATTRD_CMD_PEER_REMOVE, PCMK__ATTRD_CMD_REFRESH,
- *                      PCMK__ATTRD_CMD_FLUSH, PCMK__ATTRD_CMD_SYNC,
- *                      PCMK__ATTRD_CMD_SYNC_RESPONSE
- *     1       1.1.13   PCMK__ATTRD_CMD_UPDATE (with PCMK__XA_ATTR_PATTERN),
+ *                      PCMK__ATTRD_CMD_FLUSH, PCMK__ATTRD_CMD_SYNC_RESPONSE
+ *     1       1.1.13   PCMK__ATTRD_CMD_UPDATE (with PCMK__XA_ATTR_REGEX),
  *                      PCMK__ATTRD_CMD_QUERY
  *     1       1.1.15   PCMK__ATTRD_CMD_UPDATE_BOTH,
  *                      PCMK__ATTRD_CMD_UPDATE_DELAY
@@ -42,14 +41,16 @@
  *     4       2.1.5    Multiple attributes can be updated in a single IPC
  *                      message
  *     5       2.1.5    Peers can request confirmation of a sent message
+ *     6       2.1.7    PCMK__ATTRD_CMD_PEER_REMOVE supports PCMK__XA_REAP
  */
-#define ATTRD_PROTOCOL_VERSION "5"
+#define ATTRD_PROTOCOL_VERSION "6"
 
 #define ATTRD_SUPPORTS_MULTI_MESSAGE(x) ((x) >= 4)
 #define ATTRD_SUPPORTS_CONFIRMATION(x)  ((x) >= 5)
 
-#define attrd_send_ack(client, id, flags) \
-    pcmk__ipc_send_ack((client), (id), (flags), "ack", ATTRD_PROTOCOL_VERSION, CRM_EX_INDETERMINATE)
+#define attrd_send_ack(client, id, flags)                       \
+    pcmk__ipc_send_ack((client), (id), (flags), PCMK__XE_ACK,   \
+                       ATTRD_PROTOCOL_VERSION, CRM_EX_INDETERMINATE)
 
 void attrd_init_mainloop(void);
 void attrd_run_mainloop(void);
@@ -65,6 +66,7 @@ void attrd_ipc_fini(void);
 int attrd_cib_connect(int max_retry);
 void attrd_cib_disconnect(void);
 void attrd_cib_init(void);
+void attrd_cib_erase_transient_attrs(const char *node);
 
 bool attrd_value_needs_expansion(const char *value);
 int attrd_expand_value(const char *value, const char *old_value);
@@ -116,47 +118,75 @@ void attrd_declare_winner(void);
 void attrd_remove_voter(const crm_node_t *peer);
 void attrd_xml_add_writer(xmlNode *xml);
 
-typedef struct attribute_s {
-    char *uuid; /* TODO: Remove if at all possible */
-    char *id;
-    char *set_id;
-    char *set_type;
-    GHashTable *values;
-    int update;
-    int timeout_ms;
-
-    /* TODO: refactor these three as a bitmask */
-    bool changed; /* whether attribute value has changed since last write */
-    bool unknown_peer_uuids; /* whether we know we're missing a peer uuid */
-    gboolean is_private; /* whether to keep this attribute out of the CIB */
-
-    mainloop_timer_t *timer;
-
-    char *user;
-
-    gboolean force_write; /* Flag for updating attribute by ignoring delay */
+enum attrd_attr_flags {
+    attrd_attr_none         = 0U,
+    attrd_attr_changed      = (1U << 0),    // Attribute value has changed since last write
+    attrd_attr_uuid_missing = (1U << 1),    // Whether we know we're missing a peer UUID
+    attrd_attr_is_private   = (1U << 2),    // Whether to keep this attribute out of the CIB
+    attrd_attr_force_write  = (1U << 3),    // Update attribute by ignoring delay
+};
 
+typedef struct attribute_s {
+    char *id;       // Attribute name
+    char *set_type; // PCMK_XE_INSTANCE_ATTRIBUTES or PCMK_XE_UTILIZATION
+    char *set_id;   // Set's XML ID to use when writing
+    char *user;     // ACL user to use for CIB writes
+    int update;     // Call ID of pending write
+    int timeout_ms; // How long to wait for more changes before writing
+    uint32_t flags; // Group of enum attrd_attr_flags
+    GHashTable *values;         // Key: node name, value: attribute_value_t
+    mainloop_timer_t *timer;    // Timer to use for timeout_ms
 } attribute_t;
 
+#define attrd_set_attr_flags(attr, flags_to_set) do {               \
+        (attr)->flags = pcmk__set_flags_as(__func__, __LINE__,      \
+            LOG_TRACE, "Value for attribute", (attr)->id,           \
+            (attr)->flags, (flags_to_set), #flags_to_set);          \
+    } while (0)
+
+#define attrd_clear_attr_flags(attr, flags_to_clear) do {           \
+        (attr)->flags = pcmk__clear_flags_as(__func__, __LINE__,    \
+            LOG_TRACE, "Value for attribute", (attr)->id,           \
+            (attr)->flags, (flags_to_clear), #flags_to_clear);      \
+    } while (0)
+
+enum attrd_value_flags {
+    attrd_value_none        = 0U,
+    attrd_value_remote      = (1U << 0),  // Value is for Pacemaker Remote node
+    attrd_value_from_peer   = (1U << 1),  // Value is from peer sync response
+};
+
 typedef struct attribute_value_s {
-        uint32_t nodeid;
-        gboolean is_remote;
-        char *nodename;
-        char *current;
-        char *requested;
-        gboolean seen;
+    char *nodename;     // Node that this value is for
+    char *current;      // Attribute value
+    char *requested;    // Value specified in pending CIB write, if any
+    uint32_t nodeid;    // Cluster node ID of node that this value is for
+    uint32_t flags;     // Group of attrd_value_flags
 } attribute_value_t;
 
-extern crm_cluster_t *attrd_cluster;
+#define attrd_set_value_flags(attr_value, flags_to_set) do {            \
+        (attr_value)->flags = pcmk__set_flags_as(__func__, __LINE__,    \
+            LOG_TRACE, "Value for node", (attr_value)->nodename,        \
+            (attr_value)->flags, (flags_to_set), #flags_to_set);        \
+    } while (0)
+
+#define attrd_clear_value_flags(attr_value, flags_to_clear) do {        \
+        (attr_value)->flags = pcmk__clear_flags_as(__func__, __LINE__,  \
+            LOG_TRACE, "Value for node", (attr_value)->nodename,        \
+            (attr_value)->flags, (flags_to_clear), #flags_to_clear);    \
+    } while (0)
+
+extern pcmk_cluster_t *attrd_cluster;
 extern GHashTable *attributes;
 extern GHashTable *peer_protocol_vers;
 
 #define CIB_OP_TIMEOUT_S 120
 
 int attrd_cluster_connect(void);
+void attrd_broadcast_value(const attribute_t *a, const attribute_value_t *v);
 void attrd_peer_update(const crm_node_t *peer, xmlNode *xml, const char *host,
                        bool filter);
-void attrd_peer_sync(crm_node_t *peer, xmlNode *xml);
+void attrd_peer_sync(crm_node_t *peer);
 void attrd_peer_remove(const char *host, bool uncache, const char *source);
 void attrd_peer_clear_failure(pcmk__request_t *request);
 void attrd_peer_sync_response(const crm_node_t *peer, bool peer_won,
@@ -176,6 +206,8 @@ void attrd_clear_value_seen(void);
 void attrd_free_attribute(gpointer data);
 void attrd_free_attribute_value(gpointer data);
 attribute_t *attrd_populate_attribute(xmlNode *xml, const char *attr);
+char *attrd_set_id(const attribute_t *attr, const char *node_state_id);
+char *attrd_nvpair_id(const attribute_t *attr, const char *node_state_id);
 
 enum attrd_write_options {
     attrd_write_changed         = 0,
@@ -214,8 +246,6 @@ void attrd_remove_client_from_waitlist(pcmk__client_t *client);
 const char *attrd_request_sync_point(xmlNode *xml);
 bool attrd_request_has_sync_point(xmlNode *xml);
 
-void attrd_copy_xml_attributes(xmlNode *src, xmlNode *dest);
-
 extern gboolean stand_alone;
 
 #endif /* PACEMAKER_ATTRD__H */
diff --git a/daemons/based/Makefile.am b/daemons/based/Makefile.am
index 022fc47..c10b461 100644
--- a/daemons/based/Makefile.am
+++ b/daemons/based/Makefile.am
@@ -1,5 +1,5 @@
 #
-# Copyright 2004-2023 the Pacemaker project contributors
+# Copyright 2004-2024 the Pacemaker project contributors
 #
 # The version control history for this file may have further details.
 #
@@ -8,6 +8,7 @@
 #
 
 include $(top_srcdir)/mk/common.mk
+include $(top_srcdir)/mk/man.mk
 
 EXTRA_DIST	= cib.pam
 
@@ -35,6 +36,12 @@ pacemaker_based_SOURCES	= pacemaker-based.c 	\
 			  based_remote.c 	\
 			  based_transaction.c
 
+if BUILD_XML_HELP
+man7_MANS 	= pacemaker-based.7
+endif
+
+CLEANFILES = $(man7_MANS)
+
 .PHONY: install-exec-hook
 install-exec-hook:
 if BUILD_LEGACY_LINKS
diff --git a/daemons/based/based_callbacks.c b/daemons/based/based_callbacks.c
index 4fac222..b1a8209 100644
--- a/daemons/based/based_callbacks.c
+++ b/daemons/based/based_callbacks.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -25,7 +25,6 @@
 
 #include <crm/crm.h>
 #include <crm/cib.h>
-#include <crm/msg_xml.h>
 #include <crm/cluster/internal.h>
 
 #include <crm/common/xml.h>
@@ -72,11 +71,11 @@ cib_ipc_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
     if (cib_shutdown_flag) {
         crm_info("Ignoring new IPC client [%d] during shutdown",
                  pcmk__client_pid(c));
-        return -EPERM;
+        return -ECONNREFUSED;
     }
 
     if (pcmk__new_client(c, uid, gid) == NULL) {
-        return -EIO;
+        return -ENOMEM;
     }
     return 0;
 }
@@ -159,20 +158,20 @@ static xmlNode *
 create_cib_reply(const char *op, const char *call_id, const char *client_id,
                  int call_options, int rc, xmlNode *call_data)
 {
-    xmlNode *reply = create_xml_node(NULL, "cib-reply");
+    xmlNode *reply = pcmk__xe_create(NULL, PCMK__XE_CIB_REPLY);
 
-    CRM_ASSERT(reply != NULL);
-
-    crm_xml_add(reply, F_TYPE, T_CIB);
-    crm_xml_add(reply, F_CIB_OPERATION, op);
-    crm_xml_add(reply, F_CIB_CALLID, call_id);
-    crm_xml_add(reply, F_CIB_CLIENTID, client_id);
-    crm_xml_add_int(reply, F_CIB_CALLOPTS, call_options);
-    crm_xml_add_int(reply, F_CIB_RC, rc);
+    crm_xml_add(reply, PCMK__XA_T, PCMK__VALUE_CIB);
+    crm_xml_add(reply, PCMK__XA_CIB_OP, op);
+    crm_xml_add(reply, PCMK__XA_CIB_CALLID, call_id);
+    crm_xml_add(reply, PCMK__XA_CIB_CLIENTID, client_id);
+    crm_xml_add_int(reply, PCMK__XA_CIB_CALLOPT, call_options);
+    crm_xml_add_int(reply, PCMK__XA_CIB_RC, rc);
 
     if (call_data != NULL) {
+        xmlNode *wrapper = pcmk__xe_create(reply, PCMK__XE_CIB_CALLDATA);
+
         crm_trace("Attaching reply output");
-        add_message_xml(reply, F_CIB_CALLDATA, call_data);
+        pcmk__xml_copy(wrapper, call_data);
     }
 
     crm_log_xml_explicit(reply, "cib:reply");
@@ -189,7 +188,7 @@ do_local_notify(const xmlNode *notify_src, const char *client_id,
 
     CRM_ASSERT(notify_src && client_id);
 
-    crm_element_value_int(notify_src, F_CIB_CALLID, &call_id);
+    crm_element_value_int(notify_src, PCMK__XA_CIB_CALLID, &call_id);
 
     client_obj = pcmk__find_client_by_id(client_id);
     if (client_obj == NULL) {
@@ -252,10 +251,10 @@ void
 cib_common_callback_worker(uint32_t id, uint32_t flags, xmlNode * op_request,
                            pcmk__client_t *cib_client, gboolean privileged)
 {
-    const char *op = crm_element_value(op_request, F_CIB_OPERATION);
+    const char *op = crm_element_value(op_request, PCMK__XA_CIB_OP);
     int call_options = cib_none;
 
-    crm_element_value_int(op_request, F_CIB_CALLOPTS, &call_options);
+    crm_element_value_int(op_request, PCMK__XA_CIB_CALLOPT, &call_options);
 
     /* Requests with cib_transaction set should not be sent to based directly
      * (outside of a commit-transaction request)
@@ -266,38 +265,43 @@ cib_common_callback_worker(uint32_t id, uint32_t flags, xmlNode * op_request,
 
     if (pcmk__str_eq(op, CRM_OP_REGISTER, pcmk__str_none)) {
         if (flags & crm_ipc_client_response) {
-            xmlNode *ack = create_xml_node(NULL, __func__);
+            xmlNode *ack = pcmk__xe_create(NULL, __func__);
 
-            crm_xml_add(ack, F_CIB_OPERATION, CRM_OP_REGISTER);
-            crm_xml_add(ack, F_CIB_CLIENTID, cib_client->id);
+            crm_xml_add(ack, PCMK__XA_CIB_OP, CRM_OP_REGISTER);
+            crm_xml_add(ack, PCMK__XA_CIB_CLIENTID, cib_client->id);
             pcmk__ipc_send_xml(cib_client, id, ack, flags);
             cib_client->request_id = 0;
             free_xml(ack);
         }
         return;
 
-    } else if (pcmk__str_eq(op, T_CIB_NOTIFY, pcmk__str_none)) {
+    } else if (pcmk__str_eq(op, PCMK__VALUE_CIB_NOTIFY, pcmk__str_none)) {
         /* Update the notify filters for this client */
         int on_off = 0;
         crm_exit_t status = CRM_EX_OK;
         uint64_t bit = UINT64_C(0);
-        const char *type = crm_element_value(op_request, F_CIB_NOTIFY_TYPE);
+        const char *type = crm_element_value(op_request,
+                                             PCMK__XA_CIB_NOTIFY_TYPE);
 
-        crm_element_value_int(op_request, F_CIB_NOTIFY_ACTIVATE, &on_off);
+        crm_element_value_int(op_request, PCMK__XA_CIB_NOTIFY_ACTIVATE,
+                              &on_off);
 
         crm_debug("Setting %s callbacks %s for client %s",
                   type, (on_off? "on" : "off"), pcmk__client_name(cib_client));
 
-        if (pcmk__str_eq(type, T_CIB_POST_NOTIFY, pcmk__str_casei)) {
+        if (pcmk__str_eq(type, PCMK__VALUE_CIB_POST_NOTIFY, pcmk__str_none)) {
             bit = cib_notify_post;
 
-        } else if (pcmk__str_eq(type, T_CIB_PRE_NOTIFY, pcmk__str_casei)) {
+        } else if (pcmk__str_eq(type, PCMK__VALUE_CIB_PRE_NOTIFY,
+                                pcmk__str_none)) {
             bit = cib_notify_pre;
 
-        } else if (pcmk__str_eq(type, T_CIB_UPDATE_CONFIRM, pcmk__str_casei)) {
+        } else if (pcmk__str_eq(type, PCMK__VALUE_CIB_UPDATE_CONFIRMATION,
+                                pcmk__str_none)) {
             bit = cib_notify_confirm;
 
-        } else if (pcmk__str_eq(type, T_CIB_DIFF_NOTIFY, pcmk__str_casei)) {
+        } else if (pcmk__str_eq(type, PCMK__VALUE_CIB_DIFF_NOTIFY,
+                                pcmk__str_none)) {
             bit = cib_notify_diff;
 
         } else {
@@ -312,7 +316,7 @@ cib_common_callback_worker(uint32_t id, uint32_t flags, xmlNode * op_request,
             }
         }
 
-        pcmk__ipc_send_ack(cib_client, id, flags, "ack", NULL, status);
+        pcmk__ipc_send_ack(cib_client, id, flags, PCMK__XE_ACK, NULL, status);
         return;
     }
 
@@ -329,12 +333,13 @@ cib_common_callback(qb_ipcs_connection_t * c, void *data, size_t size, gboolean
     xmlNode *op_request = pcmk__client_data2xml(cib_client, data, &id, &flags);
 
     if (op_request) {
-        crm_element_value_int(op_request, F_CIB_CALLOPTS, &call_options);
+        crm_element_value_int(op_request, PCMK__XA_CIB_CALLOPT, &call_options);
     }
 
     if (op_request == NULL) {
         crm_trace("Invalid message from %p", c);
-        pcmk__ipc_send_ack(cib_client, id, flags, "nack", NULL, CRM_EX_PROTOCOL);
+        pcmk__ipc_send_ack(cib_client, id, flags, PCMK__XE_NACK, NULL,
+                           CRM_EX_PROTOCOL);
         return 0;
 
     } else if(cib_client == NULL) {
@@ -349,12 +354,13 @@ cib_common_callback(qb_ipcs_connection_t * c, void *data, size_t size, gboolean
     }
 
     if (cib_client->name == NULL) {
-        const char *value = crm_element_value(op_request, F_CIB_CLIENTNAME);
+        const char *value = crm_element_value(op_request,
+                                              PCMK__XA_CIB_CLIENTNAME);
 
         if (value == NULL) {
             cib_client->name = pcmk__itoa(cib_client->pid);
         } else {
-            cib_client->name = strdup(value);
+            cib_client->name = pcmk__str_copy(value);
             if (crm_is_daemon_name(value)) {
                 pcmk__set_client_flags(cib_client, cib_is_daemon);
             }
@@ -363,7 +369,7 @@ cib_common_callback(qb_ipcs_connection_t * c, void *data, size_t size, gboolean
 
     /* Allow cluster daemons more leeway before being evicted */
     if (pcmk_is_set(cib_client->flags, cib_is_daemon)) {
-        const char *qmax = cib_config_lookup("cluster-ipc-limit");
+        const char *qmax = cib_config_lookup(PCMK_OPT_CLUSTER_IPC_LIMIT);
 
         if (pcmk__set_client_queue_max(cib_client, qmax)) {
             crm_trace("IPC threshold for client %s[%u] is now %u",
@@ -372,11 +378,11 @@ cib_common_callback(qb_ipcs_connection_t * c, void *data, size_t size, gboolean
         }
     }
 
-    crm_xml_add(op_request, F_CIB_CLIENTID, cib_client->id);
-    crm_xml_add(op_request, F_CIB_CLIENTNAME, cib_client->name);
+    crm_xml_add(op_request, PCMK__XA_CIB_CLIENTID, cib_client->id);
+    crm_xml_add(op_request, PCMK__XA_CIB_CLIENTNAME, cib_client->name);
 
     CRM_LOG_ASSERT(cib_client->user != NULL);
-    pcmk__update_acl_user(op_request, F_CIB_USER, cib_client->user);
+    pcmk__update_acl_user(op_request, PCMK__XA_CIB_USER, cib_client->user);
 
     cib_common_callback_worker(id, flags, op_request, cib_client, privileged);
     free_xml(op_request);
@@ -393,7 +399,7 @@ cib_digester_cb(gpointer data)
 {
     if (based_is_primary) {
         char buffer[32];
-        xmlNode *ping = create_xml_node(NULL, "ping");
+        xmlNode *ping = pcmk__xe_create(NULL, PCMK__XE_PING);
 
         ping_seq++;
         free(ping_digest);
@@ -402,12 +408,12 @@ cib_digester_cb(gpointer data)
         snprintf(buffer, 32, "%" PRIu64, ping_seq);
         crm_trace("Requesting peer digests (%s)", buffer);
 
-        crm_xml_add(ping, F_TYPE, "cib");
-        crm_xml_add(ping, F_CIB_OPERATION, CRM_OP_PING);
-        crm_xml_add(ping, F_CIB_PING_ID, buffer);
+        crm_xml_add(ping, PCMK__XA_T, PCMK__VALUE_CIB);
+        crm_xml_add(ping, PCMK__XA_CIB_OP, CRM_OP_PING);
+        crm_xml_add(ping, PCMK__XA_CIB_PING_ID, buffer);
 
-        crm_xml_add(ping, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET);
-        send_cluster_message(NULL, crm_msg_cib, ping, TRUE);
+        crm_xml_add(ping, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET);
+        pcmk__cluster_send_message(NULL, crm_msg_cib, ping);
 
         free_xml(ping);
     }
@@ -418,14 +424,17 @@ static void
 process_ping_reply(xmlNode *reply) 
 {
     uint64_t seq = 0;
-    const char *host = crm_element_value(reply, F_ORIG);
+    const char *host = crm_element_value(reply, PCMK__XA_SRC);
 
-    xmlNode *pong = get_message_xml(reply, F_CIB_CALLDATA);
-    const char *seq_s = crm_element_value(pong, F_CIB_PING_ID);
-    const char *digest = crm_element_value(pong, XML_ATTR_DIGEST);
+    xmlNode *wrapper = pcmk__xe_first_child(reply, PCMK__XE_CIB_CALLDATA, NULL,
+                                            NULL);
+    xmlNode *pong = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
+
+    const char *seq_s = crm_element_value(pong, PCMK__XA_CIB_PING_ID);
+    const char *digest = crm_element_value(pong, PCMK__XA_DIGEST);
 
     if (seq_s == NULL) {
-        crm_debug("Ignoring ping reply with no " F_CIB_PING_ID);
+        crm_debug("Ignoring ping reply with no " PCMK__XA_CIB_PING_ID);
         return;
 
     } else {
@@ -447,7 +456,7 @@ process_ping_reply(xmlNode *reply)
         crm_trace("Ignoring ping reply %s from %s: cib updated since", seq_s, host);
 
     } else {
-        const char *version = crm_element_value(pong, XML_ATTR_CRM_VERSION);
+        const char *version = crm_element_value(pong, PCMK_XA_CRM_FEATURE_SET);
 
         if(ping_digest == NULL) {
             crm_trace("Calculating new digest");
@@ -456,16 +465,30 @@ process_ping_reply(xmlNode *reply)
 
         crm_trace("Processing ping reply %s from %s (%s)", seq_s, host, digest);
         if (!pcmk__str_eq(ping_digest, digest, pcmk__str_casei)) {
-            xmlNode *remote_cib = get_message_xml(pong, F_CIB_CALLDATA);
+            xmlNode *wrapper = pcmk__xe_first_child(pong, PCMK__XE_CIB_CALLDATA,
+                                                    NULL, NULL);
+            xmlNode *remote_cib = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
+
+            const char *admin_epoch_s = NULL;
+            const char *epoch_s = NULL;
+            const char *num_updates_s = NULL;
+
+            if (remote_cib != NULL) {
+                admin_epoch_s = crm_element_value(remote_cib,
+                                                  PCMK_XA_ADMIN_EPOCH);
+                epoch_s = crm_element_value(remote_cib, PCMK_XA_EPOCH);
+                num_updates_s = crm_element_value(remote_cib,
+                                                  PCMK_XA_NUM_UPDATES);
+            }
 
             crm_notice("Local CIB %s.%s.%s.%s differs from %s: %s.%s.%s.%s %p",
-                       crm_element_value(the_cib, XML_ATTR_GENERATION_ADMIN),
-                       crm_element_value(the_cib, XML_ATTR_GENERATION),
-                       crm_element_value(the_cib, XML_ATTR_NUMUPDATES),
+                       crm_element_value(the_cib, PCMK_XA_ADMIN_EPOCH),
+                       crm_element_value(the_cib, PCMK_XA_EPOCH),
+                       crm_element_value(the_cib, PCMK_XA_NUM_UPDATES),
                        ping_digest, host,
-                       remote_cib?crm_element_value(remote_cib, XML_ATTR_GENERATION_ADMIN):"_",
-                       remote_cib?crm_element_value(remote_cib, XML_ATTR_GENERATION):"_",
-                       remote_cib?crm_element_value(remote_cib, XML_ATTR_NUMUPDATES):"_",
+                       pcmk__s(admin_epoch_s, "_"),
+                       pcmk__s(epoch_s, "_"),
+                       pcmk__s(num_updates_s, "_"),
                        digest, remote_cib);
 
             if(remote_cib && remote_cib->children) {
@@ -513,10 +536,11 @@ static void
 queue_local_notify(xmlNode * notify_src, const char *client_id, gboolean sync_reply,
                    gboolean from_peer)
 {
-    cib_local_notify_t *notify = calloc(1, sizeof(cib_local_notify_t));
+    cib_local_notify_t *notify = pcmk__assert_alloc(1,
+                                                    sizeof(cib_local_notify_t));
 
     notify->notify_src = notify_src;
-    notify->client_id = strdup(client_id);
+    notify->client_id = pcmk__str_copy(client_id);
     notify->sync_reply = sync_reply;
     notify->from_peer = from_peer;
 
@@ -658,12 +682,12 @@ parse_peer_options_v1(const cib__operation_t *operation, xmlNode *request,
     const char *op = NULL;
     const char *host = NULL;
     const char *delegated = NULL;
-    const char *originator = crm_element_value(request, F_ORIG);
-    const char *reply_to = crm_element_value(request, F_CIB_ISREPLY);
+    const char *originator = crm_element_value(request, PCMK__XA_SRC);
+    const char *reply_to = crm_element_value(request, PCMK__XA_CIB_ISREPLYTO);
 
     gboolean is_reply = pcmk__str_eq(reply_to, OUR_NODENAME, pcmk__str_casei);
 
-    if (pcmk__xe_attr_is_true(request, F_CIB_GLOBAL_UPDATE)) {
+    if (pcmk__xe_attr_is_true(request, PCMK__XA_CIB_UPDATE)) {
         *needs_reply = FALSE;
         if (is_reply) {
             *local_notify = TRUE;
@@ -675,7 +699,7 @@ parse_peer_options_v1(const cib__operation_t *operation, xmlNode *request,
         return TRUE;
     }
 
-    op = crm_element_value(request, F_CIB_OPERATION);
+    op = crm_element_value(request, PCMK__XA_CIB_OP);
     crm_trace("Processing legacy %s request sent by %s", op, originator);
 
     if (pcmk__str_eq(op, PCMK__CIB_REQUEST_SHUTDOWN, pcmk__str_none)) {
@@ -703,7 +727,7 @@ parse_peer_options_v1(const cib__operation_t *operation, xmlNode *request,
         return TRUE;
     }
 
-    host = crm_element_value(request, F_CIB_HOST);
+    host = crm_element_value(request, PCMK__XA_CIB_HOST);
     if (pcmk__str_eq(host, OUR_NODENAME, pcmk__str_casei)) {
         crm_trace("Processing %s request sent to us from %s", op, originator);
         return TRUE;
@@ -719,7 +743,7 @@ parse_peer_options_v1(const cib__operation_t *operation, xmlNode *request,
         return TRUE;
     }
 
-    delegated = crm_element_value(request, F_CIB_DELEGATED);
+    delegated = crm_element_value(request, PCMK__XA_CIB_DELEGATED_FROM);
     if (delegated != NULL) {
         crm_trace("Ignoring message for primary instance");
 
@@ -755,10 +779,11 @@ parse_peer_options_v2(const cib__operation_t *operation, xmlNode *request,
                       gboolean *process)
 {
     const char *host = NULL;
-    const char *delegated = crm_element_value(request, F_CIB_DELEGATED);
-    const char *op = crm_element_value(request, F_CIB_OPERATION);
-    const char *originator = crm_element_value(request, F_ORIG);
-    const char *reply_to = crm_element_value(request, F_CIB_ISREPLY);
+    const char *delegated = crm_element_value(request,
+                                              PCMK__XA_CIB_DELEGATED_FROM);
+    const char *op = crm_element_value(request, PCMK__XA_CIB_OP);
+    const char *originator = crm_element_value(request, PCMK__XA_SRC);
+    const char *reply_to = crm_element_value(request, PCMK__XA_CIB_ISREPLYTO);
 
     gboolean is_reply = pcmk__str_eq(reply_to, OUR_NODENAME, pcmk__str_casei);
 
@@ -767,7 +792,7 @@ parse_peer_options_v2(const cib__operation_t *operation, xmlNode *request,
     }
 
     if (pcmk__str_eq(op, PCMK__CIB_REQUEST_REPLACE, pcmk__str_none)) {
-        /* sync_our_cib() sets F_CIB_ISREPLY */
+        // sync_our_cib() sets PCMK__XA_CIB_ISREPLYTO
         if (reply_to) {
             delegated = reply_to;
         }
@@ -783,17 +808,18 @@ parse_peer_options_v2(const cib__operation_t *operation, xmlNode *request,
 
     } else if (pcmk__str_eq(op, PCMK__CIB_REQUEST_UPGRADE, pcmk__str_none)) {
         /* Only the DC (node with the oldest software) should process
-         * this operation if F_CIB_SCHEMA_MAX is unset
+         * this operation if PCMK__XA_CIB_SCHEMA_MAX is unset.
          *
          * If the DC is happy it will then send out another
          * PCMK__CIB_REQUEST_UPGRADE which will tell all nodes to do the actual
          * upgrade.
          *
-         * Except this time F_CIB_SCHEMA_MAX will be set which puts a
+         * Except this time PCMK__XA_CIB_SCHEMA_MAX will be set which puts a
          * limit on how far newer nodes will go
          */
-        const char *max = crm_element_value(request, F_CIB_SCHEMA_MAX);
-        const char *upgrade_rc = crm_element_value(request, F_CIB_UPGRADE_RC);
+        const char *max = crm_element_value(request, PCMK__XA_CIB_SCHEMA_MAX);
+        const char *upgrade_rc = crm_element_value(request,
+                                                   PCMK__XA_CIB_UPGRADE_RC);
 
         crm_trace("Parsing upgrade %s for %s with max=%s and upgrade_rc=%s",
                   (is_reply? "reply" : "request"),
@@ -802,7 +828,7 @@ parse_peer_options_v2(const cib__operation_t *operation, xmlNode *request,
 
         if (upgrade_rc != NULL) {
             // Our upgrade request was rejected by DC, notify clients of result
-            crm_xml_add(request, F_CIB_RC, upgrade_rc);
+            crm_xml_add(request, PCMK__XA_CIB_RC, upgrade_rc);
 
         } else if ((max == NULL) && based_is_primary) {
             /* We are the DC, check if this upgrade is allowed */
@@ -817,7 +843,7 @@ parse_peer_options_v2(const cib__operation_t *operation, xmlNode *request,
             return FALSE;
         }
 
-    } else if (pcmk__xe_attr_is_true(request, F_CIB_GLOBAL_UPDATE)) {
+    } else if (pcmk__xe_attr_is_true(request, PCMK__XA_CIB_UPDATE)) {
         crm_info("Detected legacy %s global update from %s", op, originator);
         send_sync_request(NULL);
         legacy_mode = TRUE;
@@ -854,7 +880,7 @@ parse_peer_options_v2(const cib__operation_t *operation, xmlNode *request,
 
     *local_notify = pcmk__str_eq(delegated, OUR_NODENAME, pcmk__str_casei);
 
-    host = crm_element_value(request, F_CIB_HOST);
+    host = crm_element_value(request, PCMK__XA_CIB_HOST);
     if (pcmk__str_eq(host, OUR_NODENAME, pcmk__str_casei)) {
         crm_trace("Processing %s request sent to us from %s", op, originator);
         *needs_reply = TRUE;
@@ -871,8 +897,10 @@ parse_peer_options_v2(const cib__operation_t *operation, xmlNode *request,
 
     crm_trace("Processing %s request broadcast by %s call %s on %s "
               "(local clients will%s be notified)", op,
-              pcmk__s(crm_element_value(request, F_CIB_CLIENTNAME), "client"),
-              pcmk__s(crm_element_value(request, F_CIB_CALLID), "without ID"),
+              pcmk__s(crm_element_value(request, PCMK__XA_CIB_CLIENTNAME),
+                      "client"),
+              pcmk__s(crm_element_value(request, PCMK__XA_CIB_CALLID),
+                      "without ID"),
               originator, (*local_notify? "" : "not"));
     return TRUE;
 }
@@ -904,12 +932,14 @@ parse_peer_options(const cib__operation_t *operation, xmlNode *request,
 static void
 forward_request(xmlNode *request)
 {
-    const char *op = crm_element_value(request, F_CIB_OPERATION);
-    const char *section = crm_element_value(request, F_CIB_SECTION);
-    const char *host = crm_element_value(request, F_CIB_HOST);
-    const char *originator = crm_element_value(request, F_ORIG);
-    const char *client_name = crm_element_value(request, F_CIB_CLIENTNAME);
-    const char *call_id = crm_element_value(request, F_CIB_CALLID);
+    const char *op = crm_element_value(request, PCMK__XA_CIB_OP);
+    const char *section = crm_element_value(request, PCMK__XA_CIB_SECTION);
+    const char *host = crm_element_value(request, PCMK__XA_CIB_HOST);
+    const char *originator = crm_element_value(request, PCMK__XA_SRC);
+    const char *client_name = crm_element_value(request,
+                                                PCMK__XA_CIB_CLIENTNAME);
+    const char *call_id = crm_element_value(request, PCMK__XA_CIB_CALLID);
+    crm_node_t *peer = NULL;
 
     int log_level = LOG_INFO;
 
@@ -926,13 +956,15 @@ forward_request(xmlNode *request)
                pcmk__s(client_name, "unspecified"),
                pcmk__s(call_id, "unspecified"));
 
-    crm_xml_add(request, F_CIB_DELEGATED, OUR_NODENAME);
+    crm_xml_add(request, PCMK__XA_CIB_DELEGATED_FROM, OUR_NODENAME);
 
-    send_cluster_message(((host != NULL)? crm_get_peer(0, host) : NULL),
-                         crm_msg_cib, request, FALSE);
+    if (host != NULL) {
+        peer = pcmk__get_node(0, host, NULL, pcmk__node_search_cluster_member);
+    }
+    pcmk__cluster_send_message(peer, crm_msg_cib, request);
 
     // Return the request to its original state
-    xml_remove_prop(request, F_CIB_DELEGATED);
+    pcmk__xe_remove_attr(request, PCMK__XA_CIB_DELEGATED_FROM);
 }
 
 static gboolean
@@ -957,8 +989,10 @@ send_peer_reply(xmlNode * msg, xmlNode * result_diff, const char *originator, gb
         const char *digest = NULL;
         int format = 1;
 
+        xmlNode *wrapper = NULL;
+
         CRM_LOG_ASSERT(result_diff != NULL);
-        digest = crm_element_value(result_diff, XML_ATTR_DIGEST);
+        digest = crm_element_value(result_diff, PCMK__XA_DIGEST);
         crm_element_value_int(result_diff, PCMK_XA_FORMAT, &format);
 
         cib_diff_version_details(result_diff,
@@ -969,24 +1003,30 @@ send_peer_reply(xmlNode * msg, xmlNode * result_diff, const char *originator, gb
                   diff_del_admin_epoch, diff_del_epoch, diff_del_updates,
                   diff_add_admin_epoch, diff_add_epoch, diff_add_updates, digest);
 
-        crm_xml_add(msg, F_CIB_ISREPLY, originator);
-        pcmk__xe_set_bool_attr(msg, F_CIB_GLOBAL_UPDATE, true);
-        crm_xml_add(msg, F_CIB_OPERATION, PCMK__CIB_REQUEST_APPLY_PATCH);
-        crm_xml_add(msg, F_CIB_USER, CRM_DAEMON_USER);
+        crm_xml_add(msg, PCMK__XA_CIB_ISREPLYTO, originator);
+        pcmk__xe_set_bool_attr(msg, PCMK__XA_CIB_UPDATE, true);
+        crm_xml_add(msg, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_APPLY_PATCH);
+        crm_xml_add(msg, PCMK__XA_CIB_USER, CRM_DAEMON_USER);
 
         if (format == 1) {
             CRM_ASSERT(digest != NULL);
         }
 
-        add_message_xml(msg, F_CIB_UPDATE_DIFF, result_diff);
+        wrapper = pcmk__xe_create(msg, PCMK__XE_CIB_UPDATE_DIFF);
+        pcmk__xml_copy(wrapper, result_diff);
+
         crm_log_xml_explicit(msg, "copy");
-        return send_cluster_message(NULL, crm_msg_cib, msg, TRUE);
+        return pcmk__cluster_send_message(NULL, crm_msg_cib, msg);
 
     } else if (originator != NULL) {
         /* send reply via HA to originating node */
+        const crm_node_t *node =
+            pcmk__get_node(0, originator, NULL,
+                           pcmk__node_search_cluster_member);
+
         crm_trace("Sending request result to %s only", originator);
-        crm_xml_add(msg, F_CIB_ISREPLY, originator);
-        return send_cluster_message(crm_get_peer(0, originator), crm_msg_cib, msg, FALSE);
+        crm_xml_add(msg, PCMK__XA_CIB_ISREPLYTO, originator);
+        return pcmk__cluster_send_message(node, crm_msg_cib, msg);
     }
 
     return FALSE;
@@ -1020,19 +1060,20 @@ cib_process_request(xmlNode *request, gboolean privileged,
     xmlNode *result_diff = NULL;
 
     int rc = pcmk_ok;
-    const char *op = crm_element_value(request, F_CIB_OPERATION);
-    const char *originator = crm_element_value(request, F_ORIG);
-    const char *host = crm_element_value(request, F_CIB_HOST);
+    const char *op = crm_element_value(request, PCMK__XA_CIB_OP);
+    const char *originator = crm_element_value(request, PCMK__XA_SRC);
+    const char *host = crm_element_value(request, PCMK__XA_CIB_HOST);
     const char *target = NULL;
-    const char *call_id = crm_element_value(request, F_CIB_CALLID);
-    const char *client_id = crm_element_value(request, F_CIB_CLIENTID);
-    const char *client_name = crm_element_value(request, F_CIB_CLIENTNAME);
-    const char *reply_to = crm_element_value(request, F_CIB_ISREPLY);
+    const char *call_id = crm_element_value(request, PCMK__XA_CIB_CALLID);
+    const char *client_id = crm_element_value(request, PCMK__XA_CIB_CLIENTID);
+    const char *client_name = crm_element_value(request,
+                                                PCMK__XA_CIB_CLIENTNAME);
+    const char *reply_to = crm_element_value(request, PCMK__XA_CIB_ISREPLYTO);
 
     const cib__operation_t *operation = NULL;
     cib__op_fn_t op_function = NULL;
 
-    crm_element_value_int(request, F_CIB_CALLOPTS, &call_options);
+    crm_element_value_int(request, PCMK__XA_CIB_CALLOPT, &call_options);
 
     if ((host != NULL) && (*host == '\0')) {
         host = NULL;
@@ -1053,7 +1094,7 @@ cib_process_request(xmlNode *request, gboolean privileged,
         crm_trace("Processing peer %s operation from %s/%s on %s intended for %s (reply=%s)",
                   op, client_name, call_id, originator, target, reply_to);
     } else {
-        crm_xml_add(request, F_ORIG, OUR_NODENAME);
+        crm_xml_add(request, PCMK__XA_SRC, OUR_NODENAME);
         crm_trace("Processing local %s operation from %s/%s intended for %s", op, client_name, call_id, target);
     }
 
@@ -1124,7 +1165,10 @@ cib_process_request(xmlNode *request, gboolean privileged,
         time_t finished = 0;
         time_t now = time(NULL);
         int level = LOG_INFO;
-        const char *section = crm_element_value(request, F_CIB_SECTION);
+        const char *section = crm_element_value(request, PCMK__XA_CIB_SECTION);
+        const char *admin_epoch_s = NULL;
+        const char *epoch_s = NULL;
+        const char *num_updates_s = NULL;
 
         rc = cib_process_command(request, operation, op_function, &op_reply,
                                  &result_diff, privileged);
@@ -1132,7 +1176,7 @@ cib_process_request(xmlNode *request, gboolean privileged,
         if (!is_update) {
             level = LOG_TRACE;
 
-        } else if (pcmk__xe_attr_is_true(request, F_CIB_GLOBAL_UPDATE)) {
+        } else if (pcmk__xe_attr_is_true(request, PCMK__XA_CIB_UPDATE)) {
             switch (rc) {
                 case pcmk_ok:
                     level = LOG_INFO;
@@ -1150,13 +1194,19 @@ cib_process_request(xmlNode *request, gboolean privileged,
             level = LOG_WARNING;
         }
 
+        if (the_cib != NULL) {
+            admin_epoch_s = crm_element_value(the_cib, PCMK_XA_ADMIN_EPOCH);
+            epoch_s = crm_element_value(the_cib, PCMK_XA_EPOCH);
+            num_updates_s = crm_element_value(the_cib, PCMK_XA_NUM_UPDATES);
+        }
+
         do_crm_log(level,
                    "Completed %s operation for section %s: %s (rc=%d, origin=%s/%s/%s, version=%s.%s.%s)",
                    op, section ? section : "'all'", pcmk_strerror(rc), rc,
                    originator ? originator : "local", client_name, call_id,
-                   the_cib ? crm_element_value(the_cib, XML_ATTR_GENERATION_ADMIN) : "0",
-                   the_cib ? crm_element_value(the_cib, XML_ATTR_GENERATION) : "0",
-                   the_cib ? crm_element_value(the_cib, XML_ATTR_NUMUPDATES) : "0");
+                   pcmk__s(admin_epoch_s, "0"),
+                   pcmk__s(epoch_s, "0"),
+                   pcmk__s(num_updates_s, "0"));
 
         finished = time(NULL);
         if ((finished - now) > 3) {
@@ -1186,7 +1236,8 @@ cib_process_request(xmlNode *request, gboolean privileged,
         gboolean broadcast = FALSE;
 
         cib_local_bcast_num++;
-        crm_xml_add_int(request, F_CIB_LOCAL_NOTIFY_ID, cib_local_bcast_num);
+        crm_xml_add_int(request, PCMK__XA_CIB_LOCAL_NOTIFY_ID,
+                        cib_local_bcast_num);
         broadcast = send_peer_reply(request, result_diff, originator, TRUE);
 
         if (broadcast && client_id && local_notify && op_reply) {
@@ -1261,27 +1312,35 @@ static xmlNode *
 prepare_input(const xmlNode *request, enum cib__op_type type,
               const char **section)
 {
+    xmlNode *wrapper = NULL;
     xmlNode *input = NULL;
 
     *section = NULL;
 
     switch (type) {
         case cib__op_apply_patch:
-            if (pcmk__xe_attr_is_true(request, F_CIB_GLOBAL_UPDATE)) {
-                input = get_message_xml(request, F_CIB_UPDATE_DIFF);
-            } else {
-                input = get_message_xml(request, F_CIB_CALLDATA);
+            {
+                const char *wrapper_name = PCMK__XE_CIB_CALLDATA;
+
+                if (pcmk__xe_attr_is_true(request, PCMK__XA_CIB_UPDATE)) {
+                    wrapper_name = PCMK__XE_CIB_UPDATE_DIFF;
+                }
+                wrapper = pcmk__xe_first_child(request, wrapper_name, NULL,
+                                               NULL);
+                input = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
             }
             break;
 
         default:
-            input = get_message_xml(request, F_CIB_CALLDATA);
-            *section = crm_element_value(request, F_CIB_SECTION);
+            wrapper = pcmk__xe_first_child(request, PCMK__XE_CIB_CALLDATA, NULL,
+                                           NULL);
+            input = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
+            *section = crm_element_value(request, PCMK__XA_CIB_SECTION);
             break;
     }
 
     // Grab the specified section
-    if ((*section != NULL) && pcmk__xe_is(input, XML_TAG_CIB)) {
+    if ((*section != NULL) && pcmk__xe_is(input, PCMK_XE_CIB)) {
         input = pcmk_find_cib_element(input, *section);
     }
 
@@ -1289,10 +1348,10 @@ prepare_input(const xmlNode *request, enum cib__op_type type,
 }
 
 // v1 and v2 patch formats
-#define XPATH_CONFIG_CHANGE             \
-    "//" XML_CIB_TAG_CRMCONFIG " | "    \
-    "//" XML_DIFF_CHANGE                \
-    "[contains(@" XML_DIFF_PATH ",'/" XML_CIB_TAG_CRMCONFIG "/')]"
+#define XPATH_CONFIG_CHANGE         \
+    "//" PCMK_XE_CRM_CONFIG " | "   \
+    "//" PCMK_XE_CHANGE             \
+    "[contains(@" PCMK_XA_PATH ",'/" PCMK_XE_CRM_CONFIG "/')]"
 
 static bool
 contains_config_change(xmlNode *diff)
@@ -1323,10 +1382,11 @@ cib_process_command(xmlNode *request, const cib__operation_t *operation,
 
     const char *op = NULL;
     const char *section = NULL;
-    const char *call_id = crm_element_value(request, F_CIB_CALLID);
-    const char *client_id = crm_element_value(request, F_CIB_CLIENTID);
-    const char *client_name = crm_element_value(request, F_CIB_CLIENTNAME);
-    const char *originator = crm_element_value(request, F_ORIG);
+    const char *call_id = crm_element_value(request, PCMK__XA_CIB_CALLID);
+    const char *client_id = crm_element_value(request, PCMK__XA_CIB_CLIENTID);
+    const char *client_name = crm_element_value(request,
+                                                PCMK__XA_CIB_CLIENTNAME);
+    const char *originator = crm_element_value(request, PCMK__XA_SRC);
 
     int rc = pcmk_ok;
 
@@ -1345,8 +1405,8 @@ cib_process_command(xmlNode *request, const cib__operation_t *operation,
     *cib_diff = NULL;
 
     /* Start processing the request... */
-    op = crm_element_value(request, F_CIB_OPERATION);
-    crm_element_value_int(request, F_CIB_CALLOPTS, &call_options);
+    op = crm_element_value(request, PCMK__XA_CIB_OP);
+    crm_element_value_int(request, PCMK__XA_CIB_CALLOPT, &call_options);
 
     if (!privileged && pcmk_is_set(operation->flags, cib__op_attr_privileged)) {
         rc = -EACCES;
@@ -1357,7 +1417,7 @@ cib_process_command(xmlNode *request, const cib__operation_t *operation,
     input = prepare_input(request, operation->type, &section);
 
     if (!pcmk_is_set(operation->flags, cib__op_attr_modifies)) {
-        rc = cib_perform_op(op, call_options, op_function, true, section,
+        rc = cib_perform_op(NULL, op, call_options, op_function, true, section,
                             request, input, false, &config_changed, &the_cib,
                             &result_cib, NULL, &output);
 
@@ -1368,11 +1428,11 @@ cib_process_command(xmlNode *request, const cib__operation_t *operation,
     /* @COMPAT: Handle a valid write action (legacy)
      *
      * @TODO: Re-evaluate whether this is all truly legacy. The cib_force_diff
-     * portion is. However, F_CIB_GLOBAL_UPDATE may be set by a sync operation
+     * portion is. However, PCMK__XA_CIB_UPDATE may be set by a sync operation
      * even in non-legacy mode, and manage_counters tells xml_create_patchset()
      * whether to update version/epoch info.
      */
-    if (pcmk__xe_attr_is_true(request, F_CIB_GLOBAL_UPDATE)) {
+    if (pcmk__xe_attr_is_true(request, PCMK__XA_CIB_UPDATE)) {
         manage_counters = false;
         cib__set_call_options(call_options, "call", cib_force_diff);
         crm_trace("Global update detected");
@@ -1390,7 +1450,7 @@ cib_process_command(xmlNode *request, const cib__operation_t *operation,
     }
 
     // result_cib must not be modified after cib_perform_op() returns
-    rc = cib_perform_op(op, call_options, op_function, false, section,
+    rc = cib_perform_op(NULL, op, call_options, op_function, false, section,
                         request, input, manage_counters, &config_changed,
                         &the_cib, &result_cib, cib_diff, &output);
 
@@ -1426,8 +1486,8 @@ cib_process_command(xmlNode *request, const cib__operation_t *operation,
             }
 
             crm_trace("Activating %s->%s%s",
-                      crm_element_value(the_cib, XML_ATTR_NUMUPDATES),
-                      crm_element_value(result_cib, XML_ATTR_NUMUPDATES),
+                      crm_element_value(the_cib, PCMK_XA_NUM_UPDATES),
+                      crm_element_value(result_cib, PCMK_XA_NUM_UPDATES),
                       (config_changed? " changed" : ""));
 
             rc = activateCibXml(result_cib, config_changed, op);
@@ -1451,7 +1511,8 @@ cib_process_command(xmlNode *request, const cib__operation_t *operation,
          */
         if ((operation->type == cib__op_commit_transact)
             && pcmk__str_eq(originator, OUR_NODENAME, pcmk__str_casei)
-            && compare_version(crm_element_value(the_cib, XML_ATTR_CRM_VERSION),
+            && compare_version(crm_element_value(the_cib,
+                                                 PCMK_XA_CRM_FEATURE_SET),
                                "3.19.0") < 0) {
 
             sync_our_cib(request, TRUE);
@@ -1473,7 +1534,7 @@ cib_process_command(xmlNode *request, const cib__operation_t *operation,
     } else {
         crm_trace("Not activating %d %d %s", rc,
                   pcmk_is_set(call_options, cib_dryrun),
-                  crm_element_value(result_cib, XML_ATTR_NUMUPDATES));
+                  crm_element_value(result_cib, PCMK_XA_NUM_UPDATES));
 
         if (result_cib != the_cib) {
             free_xml(result_cib);
@@ -1507,7 +1568,7 @@ void
 cib_peer_callback(xmlNode * msg, void *private_data)
 {
     const char *reason = NULL;
-    const char *originator = crm_element_value(msg, F_ORIG);
+    const char *originator = crm_element_value(msg, PCMK__XA_SRC);
 
     if (cib_legacy_mode()
         && pcmk__str_eq(originator, OUR_NODENAME,
@@ -1515,7 +1576,8 @@ cib_peer_callback(xmlNode * msg, void *private_data)
         /* message is from ourselves */
         int bcast_id = 0;
 
-        if (!(crm_element_value_int(msg, F_CIB_LOCAL_NOTIFY_ID, &bcast_id))) {
+        if (crm_element_value_int(msg, PCMK__XA_CIB_LOCAL_NOTIFY_ID,
+                                  &bcast_id) == 0) {
             check_local_notify(bcast_id);
         }
         return;
@@ -1525,8 +1587,8 @@ cib_peer_callback(xmlNode * msg, void *private_data)
         goto bail;
     }
 
-    if (crm_element_value(msg, F_CIB_CLIENTNAME) == NULL) {
-        crm_xml_add(msg, F_CIB_CLIENTNAME, originator);
+    if (crm_element_value(msg, PCMK__XA_CIB_CLIENTNAME) == NULL) {
+        crm_xml_add(msg, PCMK__XA_CIB_CLIENTNAME, originator);
     }
 
     /* crm_log_xml_trace(msg, "Peer[inbound]"); */
@@ -1535,10 +1597,9 @@ cib_peer_callback(xmlNode * msg, void *private_data)
 
   bail:
     if (reason) {
-        const char *seq = crm_element_value(msg, F_SEQ);
-        const char *op = crm_element_value(msg, F_CIB_OPERATION);
+        const char *op = crm_element_value(msg, PCMK__XA_CIB_OP);
 
-        crm_warn("Discarding %s message (%s) from %s: %s", op, seq, originator, reason);
+        crm_warn("Discarding %s message from %s: %s", op, originator, reason);
     }
 }
 
@@ -1565,7 +1626,7 @@ initiate_exit(void)
     int active = 0;
     xmlNode *leaving = NULL;
 
-    active = crm_active_peers();
+    active = pcmk__cluster_num_active_nodes();
     if (active < 2) { // This is the last active node
         terminate_cib(__func__, 0);
         return;
@@ -1573,11 +1634,11 @@ initiate_exit(void)
 
     crm_info("Sending shutdown request to %d peers", active);
 
-    leaving = create_xml_node(NULL, "exit-notification");
-    crm_xml_add(leaving, F_TYPE, "cib");
-    crm_xml_add(leaving, F_CIB_OPERATION, PCMK__CIB_REQUEST_SHUTDOWN);
+    leaving = pcmk__xe_create(NULL, PCMK__XE_EXIT_NOTIFICATION);
+    crm_xml_add(leaving, PCMK__XA_T, PCMK__VALUE_CIB);
+    crm_xml_add(leaving, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_SHUTDOWN);
 
-    send_cluster_message(NULL, crm_msg_cib, leaving, TRUE);
+    pcmk__cluster_send_message(NULL, crm_msg_cib, leaving);
     free_xml(leaving);
 
     g_timeout_add(EXIT_ESCALATION_MS, cib_force_exit, NULL);
@@ -1688,14 +1749,14 @@ terminate_cib(const char *caller, int fast)
          * peer caches).
          */
         if (fast == 0) {
-            crm_cluster_disconnect(crm_cluster);
+            pcmk_cluster_disconnect(crm_cluster);
         }
         g_main_loop_quit(mainloop);
 
     } else {
         /* Quit via clean exit. Even the peer status callback can disconnect
          * here, because we're not returning control to the caller. */
-        crm_cluster_disconnect(crm_cluster);
+        pcmk_cluster_disconnect(crm_cluster);
         pcmk__stop_based_ipc(ipcs_ro, ipcs_rw, ipcs_shm);
         crm_exit(CRM_EX_OK);
     }
diff --git a/daemons/based/based_io.c b/daemons/based/based_io.c
index f252ac1..7410b03 100644
--- a/daemons/based/based_io.c
+++ b/daemons/based/based_io.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -29,7 +29,6 @@
 
 #include <crm/cib.h>
 #include <crm/common/util.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/cib/internal.h>
 #include <crm/cluster.h>
@@ -258,20 +257,20 @@ readCibXmlFile(const char *dir, const char *file, gboolean discard_status)
         crm_err("*** Disabling disk writes to avoid confusing Valgrind ***");
     }
 
-    status = find_xml_node(root, XML_CIB_TAG_STATUS, FALSE);
+    status = pcmk__xe_first_child(root, PCMK_XE_STATUS, NULL, NULL);
     if (discard_status && status != NULL) {
-        /* strip out the status section if there is one */
+        // Strip out the PCMK_XE_STATUS section if there is one
         free_xml(status);
         status = NULL;
     }
     if (status == NULL) {
-        create_xml_node(root, XML_CIB_TAG_STATUS);
+        pcmk__xe_create(root, PCMK_XE_STATUS);
     }
 
     /* Do this before schema validation happens */
 
     /* fill in some defaults */
-    name = XML_ATTR_GENERATION_ADMIN;
+    name = PCMK_XA_ADMIN_EPOCH;
     value = crm_element_value(root, name);
     if (value == NULL) {
         crm_warn("No value for %s was specified in the configuration.", name);
@@ -283,38 +282,38 @@ readCibXmlFile(const char *dir, const char *file, gboolean discard_status)
         crm_xml_add_int(root, name, 0);
     }
 
-    name = XML_ATTR_GENERATION;
+    name = PCMK_XA_EPOCH;
     value = crm_element_value(root, name);
     if (value == NULL) {
         crm_xml_add_int(root, name, 0);
     }
 
-    name = XML_ATTR_NUMUPDATES;
+    name = PCMK_XA_NUM_UPDATES;
     value = crm_element_value(root, name);
     if (value == NULL) {
         crm_xml_add_int(root, name, 0);
     }
 
     // Unset (DC should set appropriate value)
-    xml_remove_prop(root, XML_ATTR_DC_UUID);
+    pcmk__xe_remove_attr(root, PCMK_XA_DC_UUID);
 
     if (discard_status) {
         crm_log_xml_trace(root, "[on-disk]");
     }
 
-    validation = crm_element_value(root, XML_ATTR_VALIDATION);
-    if (validate_xml(root, NULL, TRUE) == FALSE) {
+    validation = crm_element_value(root, PCMK_XA_VALIDATE_WITH);
+    if (!pcmk__configured_schema_validates(root)) {
         crm_err("CIB does not validate with %s",
                 pcmk__s(validation, "no schema specified"));
         cib_status = -pcmk_err_schema_validation;
 
+    // @COMPAT Not specifying validate-with is deprecated since 2.1.8
     } else if (validation == NULL) {
-        int version = 0;
-
-        update_validation(&root, &version, 0, FALSE, FALSE);
-        if (version > 0) {
+        pcmk__update_schema(&root, NULL, false, false);
+        validation = crm_element_value(root, PCMK_XA_VALIDATE_WITH);
+        if (validation != NULL) {
             crm_notice("Enabling %s validation on"
-                       " the existing (sane) configuration", get_schema_name(version));
+                       " the existing (sane) configuration", validation);
         } else {
             crm_err("CIB does not validate with any known schema");
             cib_status = -pcmk_err_schema_validation;
@@ -408,7 +407,7 @@ write_cib_contents(gpointer p)
     /* Make a copy of the CIB to write (possibly in a forked child) */
     if (p) {
         /* Synchronous write out */
-        cib_local = copy_xml(p);
+        cib_local = pcmk__xml_copy(NULL, p);
 
     } else {
         int pid = 0;
@@ -445,7 +444,7 @@ write_cib_contents(gpointer p)
         /* In theory, we can scribble on the_cib here and not affect the parent,
          * but let's be safe anyway.
          */
-        cib_local = copy_xml(the_cib);
+        cib_local = pcmk__xml_copy(NULL, the_cib);
     }
 
     /* Write the CIB */
diff --git a/daemons/based/based_messages.c b/daemons/based/based_messages.c
index 35d639a..87b7eb1 100644
--- a/daemons/based/based_messages.c
+++ b/daemons/based/based_messages.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -24,7 +24,6 @@
 
 #include <crm/crm.h>
 #include <crm/cib/internal.h>
-#include <crm/msg_xml.h>
 
 #include <crm/common/xml.h>
 #include <crm/common/ipc_internal.h>
@@ -45,11 +44,11 @@ cib_process_shutdown_req(const char *op, int options, const char *section, xmlNo
                          xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib,
                          xmlNode ** answer)
 {
-    const char *host = crm_element_value(req, F_ORIG);
+    const char *host = crm_element_value(req, PCMK__XA_SRC);
 
     *answer = NULL;
 
-    if (crm_element_value(req, F_CIB_ISREPLY) == NULL) {
+    if (crm_element_value(req, PCMK__XA_CIB_ISREPLYTO) == NULL) {
         crm_info("Peer %s is requesting to shut down", host);
         return pcmk_ok;
     }
@@ -117,17 +116,21 @@ static int sync_in_progress = 0;
 void
 send_sync_request(const char *host)
 {
-    xmlNode *sync_me = create_xml_node(NULL, "sync-me");
+    xmlNode *sync_me = pcmk__xe_create(NULL, "sync-me");
+    crm_node_t *peer = NULL;
 
     crm_info("Requesting re-sync from %s", (host? host : "all peers"));
     sync_in_progress = 1;
 
-    crm_xml_add(sync_me, F_TYPE, "cib");
-    crm_xml_add(sync_me, F_CIB_OPERATION, PCMK__CIB_REQUEST_SYNC_TO_ONE);
-    crm_xml_add(sync_me, F_CIB_DELEGATED,
+    crm_xml_add(sync_me, PCMK__XA_T, PCMK__VALUE_CIB);
+    crm_xml_add(sync_me, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_SYNC_TO_ONE);
+    crm_xml_add(sync_me, PCMK__XA_CIB_DELEGATED_FROM,
                 stand_alone? "localhost" : crm_cluster->uname);
 
-    send_cluster_message(host ? crm_get_peer(0, host) : NULL, crm_msg_cib, sync_me, FALSE);
+    if (host != NULL) {
+        peer = pcmk__get_node(0, host, NULL, pcmk__node_search_cluster_member);
+    }
+    pcmk__cluster_send_message(peer, crm_msg_cib, sync_me);
     free_xml(sync_me);
 }
 
@@ -135,38 +138,44 @@ int
 cib_process_ping(const char *op, int options, const char *section, xmlNode * req, xmlNode * input,
                  xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer)
 {
-    const char *host = crm_element_value(req, F_ORIG);
-    const char *seq = crm_element_value(req, F_CIB_PING_ID);
+    const char *host = crm_element_value(req, PCMK__XA_SRC);
+    const char *seq = crm_element_value(req, PCMK__XA_CIB_PING_ID);
     char *digest = calculate_xml_versioned_digest(the_cib, FALSE, TRUE, CRM_FEATURE_SET);
 
+    xmlNode *wrapper = NULL;
+
     crm_trace("Processing \"%s\" event %s from %s", op, seq, host);
-    *answer = create_xml_node(NULL, XML_CRM_TAG_PING);
-
-    crm_xml_add(*answer, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET);
-    crm_xml_add(*answer, XML_ATTR_DIGEST, digest);
-    crm_xml_add(*answer, F_CIB_PING_ID, seq);
-
-    pcmk__if_tracing(
-        {
-            // Append additional detail so the receiver can log the differences
-            add_message_xml(*answer, F_CIB_CALLDATA, the_cib);
-        },
-        if (the_cib != NULL) {
-            // Always include at least the version details
-            xmlNode *shallow = create_xml_node(NULL,
-                                               (const char *) the_cib->name);
-
-            copy_in_properties(shallow, the_cib);
-            add_message_xml(*answer, F_CIB_CALLDATA, shallow);
-            free_xml(shallow);
-        }
-    );
+    *answer = pcmk__xe_create(NULL, PCMK__XE_PING_RESPONSE);
+
+    crm_xml_add(*answer, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET);
+    crm_xml_add(*answer, PCMK__XA_DIGEST, digest);
+    crm_xml_add(*answer, PCMK__XA_CIB_PING_ID, seq);
+
+    wrapper = pcmk__xe_create(*answer, PCMK__XE_CIB_CALLDATA);
+
+    if (the_cib != NULL) {
+        pcmk__if_tracing(
+            {
+                /* Append additional detail so the receiver can log the
+                 * differences
+                 */
+                pcmk__xml_copy(wrapper, the_cib);
+            },
+            {
+                // Always include at least the version details
+                const char *name = (const char *) the_cib->name;
+                xmlNode *shallow = pcmk__xe_create(wrapper, name);
+
+                pcmk__xe_copy_attrs(shallow, the_cib, pcmk__xaf_none);
+            }
+        );
+    }
 
     crm_info("Reporting our current digest to %s: %s for %s.%s.%s",
              host, digest,
-             crm_element_value(existing_cib, XML_ATTR_GENERATION_ADMIN),
-             crm_element_value(existing_cib, XML_ATTR_GENERATION),
-             crm_element_value(existing_cib, XML_ATTR_NUMUPDATES));
+             crm_element_value(existing_cib, PCMK_XA_ADMIN_EPOCH),
+             crm_element_value(existing_cib, PCMK_XA_EPOCH),
+             crm_element_value(existing_cib, PCMK_XA_NUM_UPDATES));
 
     free(digest);
 
@@ -188,51 +197,51 @@ cib_process_upgrade_server(const char *op, int options, const char *section, xml
 
     *answer = NULL;
 
-    if(crm_element_value(req, F_CIB_SCHEMA_MAX)) {
+    if (crm_element_value(req, PCMK__XA_CIB_SCHEMA_MAX) != NULL) {
         /* The originator of an upgrade request sends it to the DC, without
-         * F_CIB_SCHEMA_MAX. If an upgrade is needed, the DC re-broadcasts the
-         * request with F_CIB_SCHEMA_MAX, and each node performs the upgrade
-         * (and notifies its local clients) here.
+         * PCMK__XA_CIB_SCHEMA_MAX. If an upgrade is needed, the DC
+         * re-broadcasts the request with PCMK__XA_CIB_SCHEMA_MAX, and each node
+         * performs the upgrade (and notifies its local clients) here.
          */
         return cib_process_upgrade(
             op, options, section, req, input, existing_cib, result_cib, answer);
 
     } else {
-        int new_version = 0;
-        int current_version = 0;
-        xmlNode *scratch = copy_xml(existing_cib);
-        const char *host = crm_element_value(req, F_ORIG);
-        const char *value = crm_element_value(existing_cib, XML_ATTR_VALIDATION);
-        const char *client_id = crm_element_value(req, F_CIB_CLIENTID);
-        const char *call_opts = crm_element_value(req, F_CIB_CALLOPTS);
-        const char *call_id = crm_element_value(req, F_CIB_CALLID);
+        xmlNode *scratch = pcmk__xml_copy(NULL, existing_cib);
+        const char *host = crm_element_value(req, PCMK__XA_SRC);
+        const char *original_schema = NULL;
+        const char *new_schema = NULL;
+        const char *client_id = crm_element_value(req, PCMK__XA_CIB_CLIENTID);
+        const char *call_opts = crm_element_value(req, PCMK__XA_CIB_CALLOPT);
+        const char *call_id = crm_element_value(req, PCMK__XA_CIB_CALLID);
 
         crm_trace("Processing \"%s\" event", op);
-        if (value != NULL) {
-            current_version = get_schema_version(value);
-        }
+        original_schema = crm_element_value(existing_cib,
+                                            PCMK_XA_VALIDATE_WITH);
+        rc = pcmk__update_schema(&scratch, NULL, true, true);
+        rc = pcmk_rc2legacy(rc);
+        new_schema = crm_element_value(scratch, PCMK_XA_VALIDATE_WITH);
 
-        rc = update_validation(&scratch, &new_version, 0, TRUE, TRUE);
-        if (new_version > current_version) {
-            xmlNode *up = create_xml_node(NULL, __func__);
+        if (pcmk__cmp_schemas_by_name(new_schema, original_schema) > 0) {
+            xmlNode *up = pcmk__xe_create(NULL, __func__);
 
             rc = pcmk_ok;
             crm_notice("Upgrade request from %s verified", host);
 
-            crm_xml_add(up, F_TYPE, "cib");
-            crm_xml_add(up, F_CIB_OPERATION, PCMK__CIB_REQUEST_UPGRADE);
-            crm_xml_add(up, F_CIB_SCHEMA_MAX, get_schema_name(new_version));
-            crm_xml_add(up, F_CIB_DELEGATED, host);
-            crm_xml_add(up, F_CIB_CLIENTID, client_id);
-            crm_xml_add(up, F_CIB_CALLOPTS, call_opts);
-            crm_xml_add(up, F_CIB_CALLID, call_id);
+            crm_xml_add(up, PCMK__XA_T, PCMK__VALUE_CIB);
+            crm_xml_add(up, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_UPGRADE);
+            crm_xml_add(up, PCMK__XA_CIB_SCHEMA_MAX, new_schema);
+            crm_xml_add(up, PCMK__XA_CIB_DELEGATED_FROM, host);
+            crm_xml_add(up, PCMK__XA_CIB_CLIENTID, client_id);
+            crm_xml_add(up, PCMK__XA_CIB_CALLOPT, call_opts);
+            crm_xml_add(up, PCMK__XA_CIB_CALLID, call_id);
 
             if (cib_legacy_mode() && based_is_primary) {
                 rc = cib_process_upgrade(
                     op, options, section, up, input, existing_cib, result_cib, answer);
 
             } else {
-                send_cluster_message(NULL, crm_msg_cib, up, FALSE);
+                pcmk__cluster_send_message(NULL, crm_msg_cib, up);
             }
 
             free_xml(up);
@@ -243,25 +252,27 @@ cib_process_upgrade_server(const char *op, int options, const char *section, xml
 
         if (rc != pcmk_ok) {
             // Notify originating peer so it can notify its local clients
-            crm_node_t *origin = pcmk__search_cluster_node_cache(0, host, NULL);
+            crm_node_t *origin = NULL;
+
+            origin = pcmk__search_node_caches(0, host,
+                                              pcmk__node_search_cluster_member);
 
             crm_info("Rejecting upgrade request from %s: %s "
                      CRM_XS " rc=%d peer=%s", host, pcmk_strerror(rc), rc,
                      (origin? origin->uname : "lost"));
 
             if (origin) {
-                xmlNode *up = create_xml_node(NULL, __func__);
-
-                crm_xml_add(up, F_TYPE, "cib");
-                crm_xml_add(up, F_CIB_OPERATION, PCMK__CIB_REQUEST_UPGRADE);
-                crm_xml_add(up, F_CIB_DELEGATED, host);
-                crm_xml_add(up, F_CIB_ISREPLY, host);
-                crm_xml_add(up, F_CIB_CLIENTID, client_id);
-                crm_xml_add(up, F_CIB_CALLOPTS, call_opts);
-                crm_xml_add(up, F_CIB_CALLID, call_id);
-                crm_xml_add_int(up, F_CIB_UPGRADE_RC, rc);
-                if (send_cluster_message(origin, crm_msg_cib, up, TRUE)
-                    == FALSE) {
+                xmlNode *up = pcmk__xe_create(NULL, __func__);
+
+                crm_xml_add(up, PCMK__XA_T, PCMK__VALUE_CIB);
+                crm_xml_add(up, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_UPGRADE);
+                crm_xml_add(up, PCMK__XA_CIB_DELEGATED_FROM, host);
+                crm_xml_add(up, PCMK__XA_CIB_ISREPLYTO, host);
+                crm_xml_add(up, PCMK__XA_CIB_CLIENTID, client_id);
+                crm_xml_add(up, PCMK__XA_CIB_CALLOPT, call_opts);
+                crm_xml_add(up, PCMK__XA_CIB_CALLID, call_id);
+                crm_xml_add_int(up, PCMK__XA_CIB_UPGRADE_RC, rc);
+                if (!pcmk__cluster_send_message(origin, crm_msg_cib, up)) {
                     crm_warn("Could not send CIB upgrade result to %s", host);
                 }
                 free_xml(up);
@@ -351,7 +362,7 @@ cib_process_replace_svr(const char *op, int options, const char *section, xmlNod
     int rc =
         cib_process_replace(op, options, section, req, input, existing_cib, result_cib, answer);
 
-    if ((rc == pcmk_ok) && pcmk__xe_is(input, XML_TAG_CIB)) {
+    if ((rc == pcmk_ok) && pcmk__xe_is(input, PCMK_XE_CIB)) {
         sync_in_progress = 0;
     }
     return rc;
@@ -370,32 +381,26 @@ static xmlNode *
 cib_msg_copy(xmlNode *msg)
 {
     static const char *field_list[] = {
-        F_XML_TAGNAME,
-        F_TYPE,
-        F_CIB_CLIENTID,
-        F_CIB_CALLOPTS,
-        F_CIB_CALLID,
-        F_CIB_OPERATION,
-        F_CIB_ISREPLY,
-        F_CIB_SECTION,
-        F_CIB_HOST,
-        F_CIB_RC,
-        F_CIB_DELEGATED,
-        F_CIB_OBJID,
-        F_CIB_OBJTYPE,
-        F_CIB_EXISTING,
-        F_CIB_SEENCOUNT,
-        F_CIB_TIMEOUT,
-        F_CIB_GLOBAL_UPDATE,
-        F_CIB_CLIENTNAME,
-        F_CIB_USER,
-        F_CIB_NOTIFY_TYPE,
-        F_CIB_NOTIFY_ACTIVATE
+        PCMK__XA_T,
+        PCMK__XA_CIB_CLIENTID,
+        PCMK__XA_CIB_CALLOPT,
+        PCMK__XA_CIB_CALLID,
+        PCMK__XA_CIB_OP,
+        PCMK__XA_CIB_ISREPLYTO,
+        PCMK__XA_CIB_SECTION,
+        PCMK__XA_CIB_HOST,
+        PCMK__XA_CIB_RC,
+        PCMK__XA_CIB_DELEGATED_FROM,
+        PCMK__XA_CIB_OBJECT,
+        PCMK__XA_CIB_OBJECT_TYPE,
+        PCMK__XA_CIB_UPDATE,
+        PCMK__XA_CIB_CLIENTNAME,
+        PCMK__XA_CIB_USER,
+        PCMK__XA_CIB_NOTIFY_TYPE,
+        PCMK__XA_CIB_NOTIFY_ACTIVATE,
     };
 
-    xmlNode *copy = create_xml_node(NULL, "copy");
-
-    CRM_ASSERT(copy != NULL);
+    xmlNode *copy = pcmk__xe_create(NULL, PCMK__XE_COPY);
 
     for (int lpc = 0; lpc < PCMK__NELEM(field_list); lpc++) {
         const char *field = field_list[lpc];
@@ -414,10 +419,11 @@ sync_our_cib(xmlNode * request, gboolean all)
 {
     int result = pcmk_ok;
     char *digest = NULL;
-    const char *host = crm_element_value(request, F_ORIG);
-    const char *op = crm_element_value(request, F_CIB_OPERATION);
-
+    const char *host = crm_element_value(request, PCMK__XA_SRC);
+    const char *op = crm_element_value(request, PCMK__XA_CIB_OP);
+    crm_node_t *peer = NULL;
     xmlNode *replace_request = NULL;
+    xmlNode *wrapper = NULL;
 
     CRM_CHECK(the_cib != NULL, return -EINVAL);
     CRM_CHECK(all || (host != NULL), return -EINVAL);
@@ -427,24 +433,30 @@ sync_our_cib(xmlNode * request, gboolean all)
     replace_request = cib_msg_copy(request);
 
     if (host != NULL) {
-        crm_xml_add(replace_request, F_CIB_ISREPLY, host);
+        crm_xml_add(replace_request, PCMK__XA_CIB_ISREPLYTO, host);
     }
     if (all) {
-        xml_remove_prop(replace_request, F_CIB_HOST);
+        pcmk__xe_remove_attr(replace_request, PCMK__XA_CIB_HOST);
     }
 
-    crm_xml_add(replace_request, F_CIB_OPERATION, PCMK__CIB_REQUEST_REPLACE);
-    crm_xml_add(replace_request, "original_" F_CIB_OPERATION, op);
-    pcmk__xe_set_bool_attr(replace_request, F_CIB_GLOBAL_UPDATE, true);
+    crm_xml_add(replace_request, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_REPLACE);
+
+    // @TODO Keep for tracing, or drop?
+    crm_xml_add(replace_request, PCMK__XA_ORIGINAL_CIB_OP, op);
+
+    pcmk__xe_set_bool_attr(replace_request, PCMK__XA_CIB_UPDATE, true);
 
-    crm_xml_add(replace_request, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET);
+    crm_xml_add(replace_request, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET);
     digest = calculate_xml_versioned_digest(the_cib, FALSE, TRUE, CRM_FEATURE_SET);
-    crm_xml_add(replace_request, XML_ATTR_DIGEST, digest);
+    crm_xml_add(replace_request, PCMK__XA_DIGEST, digest);
 
-    add_message_xml(replace_request, F_CIB_CALLDATA, the_cib);
+    wrapper = pcmk__xe_create(replace_request, PCMK__XE_CIB_CALLDATA);
+    pcmk__xml_copy(wrapper, the_cib);
 
-    if (send_cluster_message
-        (all ? NULL : crm_get_peer(0, host), crm_msg_cib, replace_request, FALSE) == FALSE) {
+    if (!all) {
+        peer = pcmk__get_node(0, host, NULL, pcmk__node_search_cluster_member);
+    }
+    if (!pcmk__cluster_send_message(peer, crm_msg_cib, replace_request)) {
         result = -ENOTCONN;
     }
     free_xml(replace_request);
@@ -463,8 +475,8 @@ cib_process_commit_transaction(const char *op, int options, const char *section,
      * On failure, our caller will free *result_cib.
      */
     int rc = pcmk_rc_ok;
-    const char *client_id = crm_element_value(req, F_CIB_CLIENTID);
-    const char *origin = crm_element_value(req, F_ORIG);
+    const char *client_id = crm_element_value(req, PCMK__XA_CIB_CLIENTID);
+    const char *origin = crm_element_value(req, PCMK__XA_SRC);
     pcmk__client_t *client = pcmk__find_client_by_id(client_id);
 
     rc = based_commit_transaction(input, client, origin, result_cib);
@@ -478,3 +490,49 @@ cib_process_commit_transaction(const char *op, int options, const char *section,
     }
     return pcmk_rc2legacy(rc);
 }
+
+int
+cib_process_schemas(const char *op, int options, const char *section, xmlNode *req,
+                    xmlNode *input, xmlNode *existing_cib, xmlNode **result_cib,
+                    xmlNode **answer)
+{
+    xmlNode *wrapper = NULL;
+    xmlNode *data = NULL;
+
+    const char *after_ver = NULL;
+    GList *schemas = NULL;
+    GList *already_included = NULL;
+
+    *answer = pcmk__xe_create(NULL, PCMK__XA_SCHEMAS);
+
+    wrapper = pcmk__xe_first_child(req, PCMK__XE_CIB_CALLDATA, NULL, NULL);
+    data = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
+    if (data == NULL) {
+        crm_warn("No data specified in request");
+        return -EPROTO;
+    }
+
+    after_ver = crm_element_value(data, PCMK_XA_VERSION);
+    if (after_ver == NULL) {
+        crm_warn("No version specified in request");
+        return -EPROTO;
+    }
+
+    /* The client requested all schemas after the latest one we know about, which
+     * means the client is fully up-to-date.  Return a properly formatted reply
+     * with no schemas.
+     */
+    if (pcmk__str_eq(after_ver, pcmk__highest_schema_name(), pcmk__str_none)) {
+        return pcmk_ok;
+    }
+
+    schemas = pcmk__schema_files_later_than(after_ver);
+
+    for (GList *iter = schemas; iter != NULL; iter = iter->next) {
+        pcmk__build_schema_xml_node(*answer, iter->data, &already_included);
+    }
+
+    g_list_free_full(schemas, free);
+    g_list_free_full(already_included, free);
+    return pcmk_ok;
+}
diff --git a/daemons/based/based_notify.c b/daemons/based/based_notify.c
index 00a4c54..5160645 100644
--- a/daemons/based/based_notify.c
+++ b/daemons/based/based_notify.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -26,7 +26,6 @@
 
 #include <crm/crm.h>
 #include <crm/cib/internal.h>
-#include <crm/msg_xml.h>
 
 #include <crm/common/xml.h>
 #include <crm/common/remote_internal.h>
@@ -53,25 +52,27 @@ cib_notify_send_one(gpointer key, gpointer value, gpointer user_data)
         return;
     }
 
-    type = crm_element_value(update->msg, F_SUBTYPE);
+    type = crm_element_value(update->msg, PCMK__XA_SUBT);
     CRM_LOG_ASSERT(type != NULL);
 
     if (pcmk_is_set(client->flags, cib_notify_diff)
-        && pcmk__str_eq(type, T_CIB_DIFF_NOTIFY, pcmk__str_casei)) {
+        && pcmk__str_eq(type, PCMK__VALUE_CIB_DIFF_NOTIFY, pcmk__str_none)) {
 
         do_send = TRUE;
 
     } else if (pcmk_is_set(client->flags, cib_notify_confirm)
-               && pcmk__str_eq(type, T_CIB_UPDATE_CONFIRM, pcmk__str_casei)) {
+               && pcmk__str_eq(type, PCMK__VALUE_CIB_UPDATE_CONFIRMATION,
+                               pcmk__str_none)) {
         do_send = TRUE;
 
     } else if (pcmk_is_set(client->flags, cib_notify_pre)
-               && pcmk__str_eq(type, T_CIB_PRE_NOTIFY, pcmk__str_casei)) {
+               && pcmk__str_eq(type, PCMK__VALUE_CIB_PRE_NOTIFY,
+                               pcmk__str_none)) {
         do_send = TRUE;
 
     } else if (pcmk_is_set(client->flags, cib_notify_post)
-               && pcmk__str_eq(type, T_CIB_POST_NOTIFY, pcmk__str_casei)) {
-
+               && pcmk__str_eq(type, PCMK__VALUE_CIB_POST_NOTIFY,
+                               pcmk__str_none)) {
         do_send = TRUE;
     }
 
@@ -125,15 +126,14 @@ cib_notify_send(const xmlNode *xml)
 }
 
 static void
-attach_cib_generation(xmlNode *msg, const char *field, xmlNode *a_cib)
+attach_cib_generation(xmlNode *msg)
 {
-    xmlNode *generation = create_xml_node(NULL, XML_CIB_TAG_GENERATION_TUPPLE);
+    xmlNode *wrapper = pcmk__xe_create(msg, PCMK__XE_CIB_GENERATION);
+    xmlNode *generation = pcmk__xe_create(wrapper, PCMK__XE_GENERATION_TUPLE);
 
-    if (a_cib != NULL) {
-        copy_in_properties(generation, a_cib);
+    if (the_cib != NULL) {
+        pcmk__xe_copy_attrs(generation, the_cib, pcmk__xaf_none);
     }
-    add_message_xml(msg, field, generation);
-    free_xml(generation);
 }
 
 void
@@ -152,6 +152,7 @@ cib_diff_notify(const char *op, int result, const char *call_id,
     uint8_t log_level = LOG_TRACE;
 
     xmlNode *update_msg = NULL;
+    xmlNode *wrapper = NULL;
     const char *type = NULL;
 
     if (diff == NULL) {
@@ -191,17 +192,18 @@ cib_diff_notify(const char *op, int result, const char *call_id,
                    pcmk__s(origin, "unspecified peer"), pcmk_strerror(result));
     }
 
-    update_msg = create_xml_node(NULL, "notify");
+    update_msg = pcmk__xe_create(NULL, PCMK__XE_NOTIFY);
 
-    crm_xml_add(update_msg, F_TYPE, T_CIB_NOTIFY);
-    crm_xml_add(update_msg, F_SUBTYPE, T_CIB_DIFF_NOTIFY);
-    crm_xml_add(update_msg, F_CIB_OPERATION, op);
-    crm_xml_add(update_msg, F_CIB_CLIENTID, client_id);
-    crm_xml_add(update_msg, F_CIB_CLIENTNAME, client_name);
-    crm_xml_add(update_msg, F_CIB_CALLID, call_id);
-    crm_xml_add(update_msg, F_ORIG, origin);
-    crm_xml_add_int(update_msg, F_CIB_RC, result);
+    crm_xml_add(update_msg, PCMK__XA_T, PCMK__VALUE_CIB_NOTIFY);
+    crm_xml_add(update_msg, PCMK__XA_SUBT, PCMK__VALUE_CIB_DIFF_NOTIFY);
+    crm_xml_add(update_msg, PCMK__XA_CIB_OP, op);
+    crm_xml_add(update_msg, PCMK__XA_CIB_CLIENTID, client_id);
+    crm_xml_add(update_msg, PCMK__XA_CIB_CLIENTNAME, client_name);
+    crm_xml_add(update_msg, PCMK__XA_CIB_CALLID, call_id);
+    crm_xml_add(update_msg, PCMK__XA_SRC, origin);
+    crm_xml_add_int(update_msg, PCMK__XA_CIB_RC, result);
 
+    // @COMPAT Unused internally, drop at 3.0.0
     if (update != NULL) {
         type = (const char *) update->name;
         crm_trace("Setting type to update->name: %s", type);
@@ -209,14 +211,20 @@ cib_diff_notify(const char *op, int result, const char *call_id,
         type = (const char *) diff->name;
         crm_trace("Setting type to new_obj->name: %s", type);
     }
-    crm_xml_add(update_msg, F_CIB_OBJID, ID(diff));
-    crm_xml_add(update_msg, F_CIB_OBJTYPE, type);
-    attach_cib_generation(update_msg, "cib_generation", the_cib);
 
+    // @COMPAT Unused internally, drop at 3.0.0
+    crm_xml_add(update_msg, PCMK__XA_CIB_OBJECT, pcmk__xe_id(diff));
+    crm_xml_add(update_msg, PCMK__XA_CIB_OBJECT_TYPE, type);
+    attach_cib_generation(update_msg);
+
+    // @COMPAT Unused internally, drop at 3.0.0
     if (update != NULL) {
-        add_message_xml(update_msg, F_CIB_UPDATE, update);
+        wrapper = pcmk__xe_create(update_msg, PCMK__XE_CIB_UPDATE);
+        pcmk__xml_copy(wrapper, update);
     }
-    add_message_xml(update_msg, F_CIB_UPDATE_RESULT, diff);
+
+    wrapper = pcmk__xe_create(update_msg, PCMK__XE_CIB_UPDATE_RESULT);
+    pcmk__xml_copy(wrapper, diff);
 
     crm_log_xml_trace(update_msg, "diff-notify");
     cib_notify_send(update_msg);
diff --git a/daemons/based/based_operation.c b/daemons/based/based_operation.c
index 736d425..8dd07af 100644
--- a/daemons/based/based_operation.c
+++ b/daemons/based/based_operation.c
@@ -35,6 +35,7 @@ static const cib__op_fn_t cib_op_functions[] = {
     [cib__op_sync_all]         = cib_process_sync,
     [cib__op_sync_one]         = cib_process_sync_one,
     [cib__op_upgrade]          = cib_process_upgrade_server,
+    [cib__op_schemas]          = cib_process_schemas,
 };
 
 /*!
diff --git a/daemons/based/based_remote.c b/daemons/based/based_remote.c
index 4aa41fa..b3cb655 100644
--- a/daemons/based/based_remote.c
+++ b/daemons/based/based_remote.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -27,7 +27,6 @@
 #include <glib.h>
 #include <libxml/tree.h>
 
-#include <crm/msg_xml.h>
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_internal.h>
 #include <crm/common/xml.h>
@@ -224,20 +223,20 @@ cib_remote_auth(xmlNode * login)
         return FALSE;
     }
 
-    if (!pcmk__xe_is(login, T_CIB_COMMAND)) {
+    if (!pcmk__xe_is(login, PCMK__XE_CIB_COMMAND)) {
         crm_err("Unrecognizable message from remote client");
         crm_log_xml_info(login, "bad");
         return FALSE;
     }
 
-    tmp = crm_element_value(login, "op");
+    tmp = crm_element_value(login, PCMK_XA_OP);
     if (!pcmk__str_eq(tmp, "authenticate", pcmk__str_casei)) {
         crm_err("Wrong operation: %s", tmp);
         return FALSE;
     }
 
-    user = crm_element_value(login, "user");
-    pass = crm_element_value(login, "password");
+    user = crm_element_value(login, PCMK_XA_USER);
+    pass = crm_element_value(login, PCMK__XA_PASSWORD);
 
     if (!user || !pass) {
         crm_err("missing auth credentials");
@@ -317,7 +316,7 @@ cib_remote_listen(gpointer data)
     num_clients++;
 
     new_client = pcmk__new_unauth_client(NULL);
-    new_client->remote = calloc(1, sizeof(pcmk__remote_t));
+    new_client->remote = pcmk__assert_alloc(1, sizeof(pcmk__remote_t));
 
     if (ssock == remote_tls_fd) {
 #ifdef HAVE_GNUTLS_GNUTLS_H
@@ -411,42 +410,35 @@ cib_remote_connection_destroy(gpointer user_data)
 static void
 cib_handle_remote_msg(pcmk__client_t *client, xmlNode *command)
 {
-    const char *value = NULL;
-
-    if (!pcmk__xe_is(command, T_CIB_COMMAND)) {
+    if (!pcmk__xe_is(command, PCMK__XE_CIB_COMMAND)) {
         crm_log_xml_trace(command, "bad");
         return;
     }
 
     if (client->name == NULL) {
-        value = crm_element_value(command, F_CLIENTNAME);
-        if (value == NULL) {
-            client->name = strdup(client->id);
-        } else {
-            client->name = strdup(value);
-        }
+        client->name = pcmk__str_copy(client->id);
     }
 
     /* unset dangerous options */
-    xml_remove_prop(command, F_ORIG);
-    xml_remove_prop(command, F_CIB_HOST);
-    xml_remove_prop(command, F_CIB_GLOBAL_UPDATE);
+    pcmk__xe_remove_attr(command, PCMK__XA_SRC);
+    pcmk__xe_remove_attr(command, PCMK__XA_CIB_HOST);
+    pcmk__xe_remove_attr(command, PCMK__XA_CIB_UPDATE);
 
-    crm_xml_add(command, F_TYPE, T_CIB);
-    crm_xml_add(command, F_CIB_CLIENTID, client->id);
-    crm_xml_add(command, F_CIB_CLIENTNAME, client->name);
-    crm_xml_add(command, F_CIB_USER, client->user);
+    crm_xml_add(command, PCMK__XA_T, PCMK__VALUE_CIB);
+    crm_xml_add(command, PCMK__XA_CIB_CLIENTID, client->id);
+    crm_xml_add(command, PCMK__XA_CIB_CLIENTNAME, client->name);
+    crm_xml_add(command, PCMK__XA_CIB_USER, client->user);
 
-    if (crm_element_value(command, F_CIB_CALLID) == NULL) {
+    if (crm_element_value(command, PCMK__XA_CIB_CALLID) == NULL) {
         char *call_uuid = crm_generate_uuid();
 
         /* fix the command */
-        crm_xml_add(command, F_CIB_CALLID, call_uuid);
+        crm_xml_add(command, PCMK__XA_CIB_CALLID, call_uuid);
         free(call_uuid);
     }
 
-    if (crm_element_value(command, F_CIB_CALLOPTS) == NULL) {
-        crm_xml_add_int(command, F_CIB_CALLOPTS, 0);
+    if (crm_element_value(command, PCMK__XA_CIB_CALLOPT) == NULL) {
+        crm_xml_add_int(command, PCMK__XA_CIB_CALLOPT, 0);
     }
 
     crm_log_xml_trace(command, "Remote command: ");
@@ -515,17 +507,17 @@ cib_remote_msg(gpointer data)
         pcmk__set_client_flags(client, pcmk__client_authenticated);
         g_source_remove(client->remote->auth_timeout);
         client->remote->auth_timeout = 0;
-        client->name = crm_element_value_copy(command, "name");
+        client->name = crm_element_value_copy(command, PCMK_XA_NAME);
 
-        user = crm_element_value(command, "user");
+        user = crm_element_value(command, PCMK_XA_USER);
         if (user) {
-            client->user = strdup(user);
+            client->user = pcmk__str_copy(user);
         }
 
         /* send ACK */
-        reg = create_xml_node(NULL, "cib_result");
-        crm_xml_add(reg, F_CIB_OPERATION, CRM_OP_REGISTER);
-        crm_xml_add(reg, F_CIB_CLIENTID, client->id);
+        reg = pcmk__xe_create(NULL, PCMK__XE_CIB_RESULT);
+        crm_xml_add(reg, PCMK__XA_CIB_OP, CRM_OP_REGISTER);
+        crm_xml_add(reg, PCMK__XA_CIB_CLIENTID, client->id);
         pcmk__remote_send_xml(client->remote, reg);
         free_xml(reg);
         free_xml(command);
@@ -559,8 +551,7 @@ construct_pam_passwd(int num_msg, const struct pam_message **msg,
     CRM_CHECK(data, return PAM_CONV_ERR);
     CRM_CHECK(num_msg == 1, return PAM_CONV_ERR);       /* We only want to handle one message */
 
-    reply = calloc(1, sizeof(struct pam_response));
-    CRM_ASSERT(reply != NULL);
+    reply = pcmk__assert_alloc(1, sizeof(struct pam_response));
 
     for (count = 0; count < num_msg; ++count) {
         switch (msg[count]->msg_style) {
@@ -634,7 +625,7 @@ authenticate_user(const char *user, const char *passwd)
     }
 
     p_conv.conv = construct_pam_passwd;
-    p_conv.appdata_ptr = strdup(passwd);
+    p_conv.appdata_ptr = pcmk__str_copy(passwd);
 
     rc = pam_start(pam_name, user, &p_conv, &pam_h);
     if (rc != PAM_SUCCESS) {
diff --git a/daemons/based/based_transaction.c b/daemons/based/based_transaction.c
index 89aea2e..39b3439 100644
--- a/daemons/based/based_transaction.c
+++ b/daemons/based/based_transaction.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2023 the Pacemaker project contributors
+ * Copyright 2023-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -28,21 +28,15 @@
 char *
 based_transaction_source_str(const pcmk__client_t *client, const char *origin)
 {
-    char *source = NULL;
-
     if (client != NULL) {
-        source = crm_strdup_printf("client %s (%s)%s%s",
-                                   pcmk__client_name(client),
-                                   pcmk__s(client->id, "unidentified"),
-                                   ((origin != NULL)? " on " : ""),
-                                   pcmk__s(origin, ""));
-
+        return crm_strdup_printf("client %s (%s)%s%s",
+                                 pcmk__client_name(client),
+                                 pcmk__s(client->id, "unidentified"),
+                                 ((origin != NULL)? " on " : ""),
+                                 pcmk__s(origin, ""));
     } else {
-        source = strdup((origin != NULL)? origin : "unknown source");
+        return pcmk__str_copy(pcmk__s(origin, "unknown source"));
     }
-
-    CRM_ASSERT(source != NULL);
-    return source;
 }
 
 /*!
@@ -61,11 +55,13 @@ static int
 process_transaction_requests(xmlNodePtr transaction,
                              const pcmk__client_t *client, const char *source)
 {
-    for (xmlNodePtr request = first_named_child(transaction, T_CIB_COMMAND);
-         request != NULL; request = crm_next_same_xml(request)) {
+    for (xmlNode *request = pcmk__xe_first_child(transaction,
+                                                 PCMK__XE_CIB_COMMAND, NULL,
+                                                 NULL);
+         request != NULL; request = pcmk__xe_next_same(request)) {
 
-        const char *op = crm_element_value(request, F_CIB_OPERATION);
-        const char *host = crm_element_value(request, F_CIB_HOST);
+        const char *op = crm_element_value(request, PCMK__XA_CIB_OP);
+        const char *host = crm_element_value(request, PCMK__XA_CIB_HOST);
         const cib__operation_t *operation = NULL;
         int rc = cib__get_operation(op, &operation);
 
@@ -127,7 +123,7 @@ based_commit_transaction(xmlNodePtr transaction, const pcmk__client_t *client,
 
     CRM_ASSERT(result_cib != NULL);
 
-    CRM_CHECK(pcmk__xe_is(transaction, T_CIB_TRANSACTION),
+    CRM_CHECK(pcmk__xe_is(transaction, PCMK__XE_CIB_TRANSACTION),
               return pcmk_rc_no_transaction);
 
     /* *result_cib should be a copy of the_cib (created by cib_perform_op()). If
@@ -138,7 +134,7 @@ based_commit_transaction(xmlNodePtr transaction, const pcmk__client_t *client,
      * * cib_perform_op() will infer changes for the commit request at the end.
      */
     CRM_CHECK((*result_cib != NULL) && (*result_cib != the_cib),
-              *result_cib = copy_xml(the_cib));
+              *result_cib = pcmk__xml_copy(NULL, the_cib));
 
     source = based_transaction_source_str(client, origin);
     crm_trace("Committing transaction for %s to working CIB", source);
diff --git a/daemons/based/pacemaker-based.c b/daemons/based/pacemaker-based.c
index 5dd7938..137930b 100644
--- a/daemons/based/pacemaker-based.c
+++ b/daemons/based/pacemaker-based.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -21,7 +21,6 @@
 
 #include <crm/crm.h>
 #include <crm/cib/internal.h>
-#include <crm/msg_xml.h>
 #include <crm/cluster/internal.h>
 #include <crm/common/cmdline_internal.h>
 #include <crm/common/mainloop.h>
@@ -36,7 +35,7 @@ extern int init_remote_listener(int port, gboolean encrypted);
 gboolean cib_shutdown_flag = FALSE;
 int cib_status = pcmk_ok;
 
-crm_cluster_t *crm_cluster = NULL;
+pcmk_cluster_t *crm_cluster = NULL;
 
 GMainLoop *mainloop = NULL;
 gchar *cib_root = NULL;
@@ -126,6 +125,19 @@ setup_stand_alone(GError **error)
     return pcmk_rc_ok;
 }
 
+/* @COMPAT Deprecated since 2.1.8. Use pcmk_list_cluster_options() or
+ * crm_attribute --list-options=cluster instead of querying daemon metadata.
+ */
+static int
+based_metadata(pcmk__output_t *out)
+{
+    return pcmk__daemon_metadata(out, "pacemaker-based",
+                                 "Cluster Information Base manager options",
+                                 "Cluster options used by Pacemaker's Cluster "
+                                 "Information Base manager",
+                                 pcmk__opt_based);
+}
+
 static GOptionEntry entries[] = {
     { "stand-alone", 's', G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &stand_alone,
       "(Advanced use only) Run in stand-alone mode", NULL },
@@ -154,8 +166,7 @@ build_arg_context(pcmk__common_args_t *args, GOptionGroup **group)
 {
     GOptionContext *context = NULL;
 
-    context = pcmk__build_arg_context(args, "text (default), xml", group,
-                                      "[metadata]");
+    context = pcmk__build_arg_context(args, "text (default), xml", group, NULL);
     pcmk__add_main_args(context, entries);
     return context;
 }
@@ -204,7 +215,13 @@ main(int argc, char **argv)
 
     if ((g_strv_length(processed_args) >= 2)
         && pcmk__str_eq(processed_args[1], "metadata", pcmk__str_none)) {
-        cib_metadata();
+
+        rc = based_metadata(out);
+        if (rc != pcmk_rc_ok) {
+            exit_code = CRM_EX_FATAL;
+            g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
+                        "Unable to display metadata: %s", pcmk_rc_str(rc));
+        }
         goto done;
     }
 
@@ -254,7 +271,7 @@ main(int argc, char **argv)
         goto done;
     }
 
-    crm_peer_init();
+    pcmk__cluster_init_node_caches();
 
     // Read initial CIB, connect to cluster, and start IPC servers
     cib_init();
@@ -267,14 +284,14 @@ main(int argc, char **argv)
     /* If main loop returned, clean up and exit. We disconnect in case
      * terminate_cib() was called with fast=-1.
      */
-    crm_cluster_disconnect(crm_cluster);
+    pcmk_cluster_disconnect(crm_cluster);
     pcmk__stop_based_ipc(ipcs_ro, ipcs_rw, ipcs_shm);
 
 done:
     g_strfreev(processed_args);
     pcmk__free_arg_context(context);
 
-    crm_peer_destroy();
+    pcmk__cluster_destroy_node_caches();
 
     if (local_notify_queue != NULL) {
         g_hash_table_destroy(local_notify_queue);
@@ -306,20 +323,19 @@ cib_cs_dispatch(cpg_handle_t handle,
     uint32_t kind = 0;
     xmlNode *xml = NULL;
     const char *from = NULL;
-    char *data = pcmk_message_common_cs(handle, nodeid, pid, msg, &kind, &from);
+    char *data = pcmk__cpg_message_data(handle, nodeid, pid, msg, &kind, &from);
 
     if(data == NULL) {
         return;
     }
     if (kind == crm_class_cluster) {
-        xml = string2xml(data);
+        xml = pcmk__xml_parse(data);
         if (xml == NULL) {
             crm_err("Invalid XML: '%.120s'", data);
             free(data);
             return;
         }
-        crm_xml_add(xml, F_ORIG, from);
-        /* crm_xml_add_int(xml, F_SEQ, wrapper->id); */
+        crm_xml_add(xml, PCMK__XA_SRC, from);
         cib_peer_callback(xml, NULL);
     }
 
@@ -359,7 +375,7 @@ cib_peer_update_callback(enum crm_status_type type, crm_node_t * node, const voi
 
         case crm_status_uname:
         case crm_status_nstate:
-            if (cib_shutdown_flag && (crm_active_peers() < 2)
+            if (cib_shutdown_flag && (pcmk__cluster_num_active_nodes() < 2)
                 && (pcmk__ipc_client_count() == 0)) {
 
                 crm_info("No more peers");
@@ -375,10 +391,10 @@ cib_init(void)
     crm_cluster = pcmk_cluster_new();
 
 #if SUPPORT_COROSYNC
-    if (is_corosync_cluster()) {
-        crm_cluster->destroy = cib_cs_destroy;
-        crm_cluster->cpg.cpg_deliver_fn = cib_cs_dispatch;
-        crm_cluster->cpg.cpg_confchg_fn = pcmk_cpg_membership;
+    if (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync) {
+        pcmk_cluster_set_destroy_fn(crm_cluster, cib_cs_destroy);
+        pcmk_cpg_set_deliver_fn(crm_cluster, cib_cs_dispatch);
+        pcmk_cpg_set_confchg_fn(crm_cluster, pcmk__cpg_confchg_cb);
     }
 #endif // SUPPORT_COROSYNC
 
@@ -390,9 +406,9 @@ cib_init(void)
     }
 
     if (!stand_alone) {
-        crm_set_status_callback(&cib_peer_update_callback);
+        pcmk__cluster_set_status_callback(&cib_peer_update_callback);
 
-        if (!crm_cluster_connect(crm_cluster)) {
+        if (pcmk_cluster_connect(crm_cluster) != pcmk_rc_ok) {
             crm_crit("Cannot sign in to the cluster... terminating");
             crm_exit(CRM_EX_FATAL);
         }
@@ -419,12 +435,13 @@ startCib(const char *filename)
 
         cib_read_config(config_hash, cib);
 
-        pcmk__scan_port(crm_element_value(cib, "remote-tls-port"), &port);
+        pcmk__scan_port(crm_element_value(cib, PCMK_XA_REMOTE_TLS_PORT), &port);
         if (port >= 0) {
             remote_tls_fd = init_remote_listener(port, TRUE);
         }
 
-        pcmk__scan_port(crm_element_value(cib, "remote-clear-port"), &port);
+        pcmk__scan_port(crm_element_value(cib, PCMK_XA_REMOTE_CLEAR_PORT),
+                        &port);
         if (port >= 0) {
             remote_fd = init_remote_listener(port, FALSE);
         }
diff --git a/daemons/based/pacemaker-based.h b/daemons/based/pacemaker-based.h
index 33c7642..16b0e78 100644
--- a/daemons/based/pacemaker-based.h
+++ b/daemons/based/pacemaker-based.h
@@ -56,7 +56,7 @@ extern crm_trigger_t *cib_writer;
 extern gboolean cib_writes_enabled;
 
 extern GMainLoop *mainloop;
-extern crm_cluster_t *crm_cluster;
+extern pcmk_cluster_t *crm_cluster;
 extern GHashTable *local_notify_queue;
 extern gboolean legacy_mode;
 extern gboolean stand_alone;
@@ -122,6 +122,10 @@ int cib_process_commit_transaction(const char *op, int options,
                                    const char *section, xmlNode *req,
                                    xmlNode *input, xmlNode *existing_cib,
                                    xmlNode **result_cib, xmlNode **answer);
+int cib_process_schemas(const char *op, int options, const char *section,
+                        xmlNode *req, xmlNode *input, xmlNode *existing_cib,
+                        xmlNode **result_cib, xmlNode **answer);
+
 void send_sync_request(const char *host);
 int sync_our_cib(xmlNode *request, gboolean all);
 
diff --git a/daemons/controld/controld_attrd.c b/daemons/controld/controld_attrd.c
index 923abb9..f728bef 100644
--- a/daemons/controld/controld_attrd.c
+++ b/daemons/controld/controld_attrd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2022 the Pacemaker project contributors
+ * Copyright 2006-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -10,10 +10,10 @@
 #include <crm_internal.h>
 
 #include <crm/crm.h>
-#include <crm/common/attrd_internal.h>
+#include <crm/common/attrs_internal.h>
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_attrd_internal.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 
 #include <pacemaker-controld.h>
 
@@ -117,7 +117,7 @@ update_attrd_remote_node_removed(const char *host, const char *user_name)
     if (rc == pcmk_rc_ok) {
         crm_trace("Asking attribute manager to purge Pacemaker Remote node %s",
                   host);
-        rc = pcmk__attrd_api_purge(attrd_api, host);
+        rc = pcmk__attrd_api_purge(attrd_api, host, true);
     }
     if (rc != pcmk_rc_ok) {
         crm_err("Could not purge Pacemaker Remote node %s "
@@ -136,25 +136,23 @@ update_attrd_clear_failures(const char *host, const char *rsc, const char *op,
         rc = pcmk_new_ipc_api(&attrd_api, pcmk_ipc_attrd);
     }
     if (rc == pcmk_rc_ok) {
-        const char *op_desc = pcmk__s(op, "operations");
-        const char *interval_desc = "all";
         uint32_t attrd_opts = pcmk__node_attr_none;
 
-        if (op != NULL) {
-            interval_desc = pcmk__s(interval_spec, "nonrecurring");
-        }
         if (is_remote_node) {
             pcmk__set_node_attr_flags(attrd_opts, pcmk__node_attr_remote);
         }
-        crm_info("Asking attribute manager to clear failure of %s %s for %s "
-                 "on %s node %s", interval_desc, op_desc, rsc,
-                 node_type(is_remote_node), host);
         rc = pcmk__attrd_api_clear_failures(attrd_api, host, rsc, op,
                                             interval_spec, NULL, attrd_opts);
     }
     if (rc != pcmk_rc_ok) {
-        crm_err("Could not clear failure attributes for %s on %s node %s%s: %s "
-                CRM_XS " rc=%d", pcmk__s(rsc, "all resources"),
-                node_type(is_remote_node), host, when(), pcmk_rc_str(rc), rc);
+        const char *interval_desc = "all";
+
+        if (op != NULL) {
+            interval_desc = pcmk__s(interval_spec, "nonrecurring");
+        }
+        crm_err("Could not clear failure of %s %s for %s on %s node %s%s: %s "
+                CRM_XS " rc=%d", interval_desc, pcmk__s(op, "operations"),
+                pcmk__s(rsc, "all resources"), node_type(is_remote_node), host,
+                when(), pcmk_rc_str(rc), rc);
     }
 }
diff --git a/daemons/controld/controld_callbacks.c b/daemons/controld/controld_callbacks.c
index 7078739..16e6424 100644
--- a/daemons/controld/controld_callbacks.c
+++ b/daemons/controld/controld_callbacks.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -13,7 +13,6 @@
 #include <string.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/cluster.h>
 #include <crm/cib.h>
@@ -27,15 +26,15 @@ void
 crmd_ha_msg_filter(xmlNode * msg)
 {
     if (AM_I_DC) {
-        const char *sys_from = crm_element_value(msg, F_CRM_SYS_FROM);
+        const char *sys_from = crm_element_value(msg, PCMK__XA_CRM_SYS_FROM);
 
         if (pcmk__str_eq(sys_from, CRM_SYSTEM_DC, pcmk__str_casei)) {
-            const char *from = crm_element_value(msg, F_ORIG);
+            const char *from = crm_element_value(msg, PCMK__XA_SRC);
 
             if (!pcmk__str_eq(from, controld_globals.our_nodename,
                               pcmk__str_casei)) {
                 int level = LOG_INFO;
-                const char *op = crm_element_value(msg, F_CRM_TASK);
+                const char *op = crm_element_value(msg, PCMK__XA_CRM_TASK);
 
                 /* make sure the election happens NOW */
                 if (controld_globals.fsa_state != S_ELECTION) {
@@ -53,7 +52,7 @@ crmd_ha_msg_filter(xmlNode * msg)
         }
 
     } else {
-        const char *sys_to = crm_element_value(msg, F_CRM_SYS_TO);
+        const char *sys_to = crm_element_value(msg, PCMK__XA_CRM_SYS_TO);
 
         if (pcmk__str_eq(sys_to, CRM_SYSTEM_DC, pcmk__str_casei)) {
             return;
@@ -84,7 +83,7 @@ node_alive(const crm_node_t *node)
         // Pacemaker Remote nodes can't be partially alive
         return pcmk__str_eq(node->state, CRM_NODE_MEMBER, pcmk__str_casei) ? 1: -1;
 
-    } else if (crm_is_peer_active(node)) {
+    } else if (pcmk__cluster_is_node_active(node)) {
         // Completely up cluster node: both cluster member and peer
         return 1;
 
@@ -128,7 +127,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
         xmlNode *query = create_request(CRM_OP_HELLO, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL);
 
         crm_debug("Sending hello to node %u so that it learns our node name", node->id);
-        send_cluster_message(node, crm_msg_crmd, query, FALSE);
+        pcmk__cluster_send_message(node, crm_msg_crmd, query);
 
         free_xml(query);
     }
@@ -178,7 +177,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
                 const char *dc_s = controld_globals.dc_name;
 
                 if ((dc_s == NULL) && AM_I_DC) {
-                    dc_s = "true";
+                    dc_s = PCMK_VALUE_TRUE;
                 }
 
                 crm_info("Node %s is %s a peer " CRM_XS
@@ -222,7 +221,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
 
             } else if (pcmk__str_eq(node->uname, controld_globals.dc_name,
                                     pcmk__str_casei)
-                       && !crm_is_peer_active(node)) {
+                       && !pcmk__cluster_is_node_active(node)) {
                 /* Did the DC leave us? */
                 crm_notice("Our peer on the DC (%s) is dead",
                            controld_globals.dc_name);
@@ -274,7 +273,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
         }
 
         if (down) {
-            const char *task = crm_element_value(down->xml, XML_LRM_ATTR_TASK);
+            const char *task = crm_element_value(down->xml, PCMK_XA_OPERATION);
 
             if (pcmk__str_eq(task, PCMK_ACTION_STONITH, pcmk__str_casei)) {
 
@@ -322,8 +321,8 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
                 crm_update_peer_join(__func__, node, crm_join_none);
                 check_join_state(controld_globals.fsa_state, __func__);
             }
-            abort_transition(INFINITY, pcmk__graph_restart, "Node failure",
-                             NULL);
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                             "Node failure", NULL);
             fail_incompletable_actions(controld_globals.transition_graph,
                                        node->uuid);
 
@@ -340,7 +339,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
 
             /* Trigger resource placement on newly integrated nodes */
             if (appeared) {
-                abort_transition(INFINITY, pcmk__graph_restart,
+                abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                                  "Pacemaker Remote node integrated", NULL);
             }
         }
@@ -349,7 +348,8 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
             && (node->when_member > 1)) {
             /* The node left CPG but is still a cluster member. Set its
              * membership time to 1 to record it in the cluster state as a
-             * boolean, so we don't fence it due to node-pending-timeout.
+             * boolean, so we don't fence it due to
+             * PCMK_OPT_NODE_PENDING_TIMEOUT.
              */
             node->when_member = 1;
             flags |= node_update_cluster;
@@ -361,7 +361,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
         if (update == NULL) {
             crm_debug("Node state update not yet possible for %s", node->uname);
         } else {
-            fsa_cib_anon_update(XML_CIB_TAG_STATUS, update);
+            fsa_cib_anon_update(PCMK_XE_STATUS, update);
         }
         free_xml(update);
     }
diff --git a/daemons/controld/controld_cib.c b/daemons/controld/controld_cib.c
index 865e41f..7acff30 100644
--- a/daemons/controld/controld_cib.c
+++ b/daemons/controld/controld_cib.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,6 @@
 #include <crm/common/alerts_internal.h>
 #include <crm/common/xml.h>
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/lrmd_internal.h>
 
 #include <pacemaker-controld.h>
@@ -59,8 +58,8 @@ do_cib_updated(const char *event, xmlNode * msg)
         return;
     }
 
-    if (cib__element_in_patchset(patchset, XML_CIB_TAG_ALERTS)
-        || cib__element_in_patchset(patchset, XML_CIB_TAG_CRMCONFIG)) {
+    if (cib__element_in_patchset(patchset, PCMK_XE_ALERTS)
+        || cib__element_in_patchset(patchset, PCMK_XE_CRM_CONFIG)) {
 
         controld_trigger_config();
     }
@@ -70,21 +69,21 @@ do_cib_updated(const char *event, xmlNode * msg)
         return;
     }
 
-    client_name = crm_element_value(msg, F_CIB_CLIENTNAME);
+    client_name = crm_element_value(msg, PCMK__XA_CIB_CLIENTNAME);
     if (!cib__client_triggers_refresh(client_name)) {
         // The CIB is still accurate
         return;
     }
 
-    if (cib__element_in_patchset(patchset, XML_CIB_TAG_NODES)
-        || cib__element_in_patchset(patchset, XML_CIB_TAG_STATUS)) {
+    if (cib__element_in_patchset(patchset, PCMK_XE_NODES)
+        || cib__element_in_patchset(patchset, PCMK_XE_STATUS)) {
 
-        /* An unsafe client modified the nodes or status section. Ensure the
-         * node list is up-to-date, and start the join process again so we get
-         * everyone's current resource history.
+        /* An unsafe client modified the PCMK_XE_NODES or PCMK_XE_STATUS
+         * section. Ensure the node list is up-to-date, and start the join
+         * process again so we get everyone's current resource history.
          */
         if (client_name == NULL) {
-            client_name = crm_element_value(msg, F_CIB_CLIENTID);
+            client_name = crm_element_value(msg, PCMK__XA_CIB_CLIENTID);
         }
         crm_notice("Populating nodes and starting an election after %s event "
                    "triggered by %s",
@@ -106,7 +105,7 @@ controld_disconnect_cib_manager(void)
 
     controld_clear_fsa_input_flags(R_CIB_CONNECTED);
 
-    cib_conn->cmds->del_notify_callback(cib_conn, T_CIB_DIFF_NOTIFY,
+    cib_conn->cmds->del_notify_callback(cib_conn, PCMK__VALUE_CIB_DIFF_NOTIFY,
                                         do_cib_updated);
     cib_free_callbacks(cib_conn);
 
@@ -175,7 +174,7 @@ do_cib_control(long long action,
         crm_err("Could not set dnotify callback");
 
     } else if (cib_conn->cmds->add_notify_callback(cib_conn,
-                                                   T_CIB_DIFF_NOTIFY,
+                                                   PCMK__VALUE_CIB_DIFF_NOTIFY,
                                                    update_cb) != pcmk_ok) {
         crm_err("Could not set CIB notification callback (update)");
 
@@ -226,12 +225,9 @@ cib_op_timeout(void)
                   env_timeout, (env? env : "none"));
     }
 
-    calculated_timeout = 1 + crm_active_peers();
-    if (crm_remote_peer_cache) {
-        calculated_timeout += g_hash_table_size(crm_remote_peer_cache);
-    }
-    calculated_timeout *= 10;
-
+    calculated_timeout = 10U * (1U
+                                + pcmk__cluster_num_active_nodes()
+                                + pcmk__cluster_num_remote_nodes());
     calculated_timeout = QB_MAX(calculated_timeout, env_timeout);
     crm_trace("Calculated timeout: %us", calculated_timeout);
 
@@ -275,32 +271,32 @@ cib_delete_callback(xmlNode *msg, int call_id, int rc, xmlNode *output,
     }
 }
 
-// Searches for various portions of node_state to delete
+// Searches for various portions of PCMK__XE_NODE_STATE to delete
 
-// Match a particular node's node_state (takes node name 1x)
-#define XPATH_NODE_STATE        "//" XML_CIB_TAG_STATE "[@" XML_ATTR_UNAME "='%s']"
+// Match a particular node's PCMK__XE_NODE_STATE (takes node name 1x)
+#define XPATH_NODE_STATE "//" PCMK__XE_NODE_STATE "[@" PCMK_XA_UNAME "='%s']"
 
 // Node's lrm section (name 1x)
-#define XPATH_NODE_LRM          XPATH_NODE_STATE "/" XML_CIB_TAG_LRM
+#define XPATH_NODE_LRM XPATH_NODE_STATE "/" PCMK__XE_LRM
 
-/* Node's lrm_rsc_op entries and lrm_resource entries without unexpired lock
- * (name 2x, (seconds_since_epoch - XML_CONFIG_ATTR_SHUTDOWN_LOCK_LIMIT) 1x)
+/* Node's PCMK__XE_LRM_RSC_OP entries and PCMK__XE_LRM_RESOURCE entries without
+ * unexpired lock
+ * (name 2x, (seconds_since_epoch - PCMK_OPT_SHUTDOWN_LOCK_LIMIT) 1x)
  */
-#define XPATH_NODE_LRM_UNLOCKED XPATH_NODE_STATE "//" XML_LRM_TAG_RSC_OP    \
+#define XPATH_NODE_LRM_UNLOCKED XPATH_NODE_STATE "//" PCMK__XE_LRM_RSC_OP   \
                                 "|" XPATH_NODE_STATE                        \
-                                "//" XML_LRM_TAG_RESOURCE                   \
-                                "[not(@" XML_CONFIG_ATTR_SHUTDOWN_LOCK ") " \
-                                "or " XML_CONFIG_ATTR_SHUTDOWN_LOCK "<%lld]"
+                                "//" PCMK__XE_LRM_RESOURCE                  \
+                                "[not(@" PCMK_OPT_SHUTDOWN_LOCK ") "        \
+                                    "or " PCMK_OPT_SHUTDOWN_LOCK "<%lld]"
 
-// Node's transient_attributes section (name 1x)
-#define XPATH_NODE_ATTRS        XPATH_NODE_STATE "/" XML_TAG_TRANSIENT_NODEATTRS
+// Node's PCMK__XE_TRANSIENT_ATTRIBUTES section (name 1x)
+#define XPATH_NODE_ATTRS XPATH_NODE_STATE "/" PCMK__XE_TRANSIENT_ATTRIBUTES
 
-// Everything under node_state (name 1x)
+// Everything under PCMK__XE_NODE_STATE (name 1x)
 #define XPATH_NODE_ALL          XPATH_NODE_STATE "/*"
 
 /* Unlocked history + transient attributes
- * (name 2x, (seconds_since_epoch - XML_CONFIG_ATTR_SHUTDOWN_LOCK_LIMIT) 1x,
- * name 1x)
+ * (name 2x, (seconds_since_epoch - PCMK_OPT_SHUTDOWN_LOCK_LIMIT) 1x, name 1x)
  */
 #define XPATH_NODE_ALL_UNLOCKED XPATH_NODE_LRM_UNLOCKED "|" XPATH_NODE_ATTRS
 
@@ -309,7 +305,7 @@ cib_delete_callback(xmlNode *msg, int call_id, int rc, xmlNode *output,
  * \brief Get the XPath and description of a node state section to be deleted
  *
  * \param[in]  uname    Desired node
- * \param[in]  section  Subsection of node_state to be deleted
+ * \param[in]  section  Subsection of \c PCMK__XE_NODE_STATE to be deleted
  * \param[out] xpath    Where to store XPath of \p section
  * \param[out] desc     If not \c NULL, where to store description of \p section
  */
@@ -360,10 +356,10 @@ controld_node_state_deletion_strings(const char *uname,
 
 /*!
  * \internal
- * \brief Delete subsection of a node's CIB node_state
+ * \brief Delete subsection of a node's CIB \c PCMK__XE_NODE_STATE
  *
  * \param[in] uname    Desired node
- * \param[in] section  Subsection of node_state to delete
+ * \param[in] section  Subsection of \c PCMK__XE_NODE_STATE to delete
  * \param[in] options  CIB call options to use
  */
 void
@@ -391,12 +387,12 @@ controld_delete_node_state(const char *uname, enum controld_section_e section,
 }
 
 // Takes node name and resource ID
-#define XPATH_RESOURCE_HISTORY "//" XML_CIB_TAG_STATE                       \
-                               "[@" XML_ATTR_UNAME "='%s']/"                \
-                               XML_CIB_TAG_LRM "/" XML_LRM_TAG_RESOURCES    \
-                               "/" XML_LRM_TAG_RESOURCE                     \
-                               "[@" XML_ATTR_ID "='%s']"
-// @TODO could add "and @XML_CONFIG_ATTR_SHUTDOWN_LOCK" to limit to locks
+#define XPATH_RESOURCE_HISTORY "//" PCMK__XE_NODE_STATE                 \
+                               "[@" PCMK_XA_UNAME "='%s']/"             \
+                               PCMK__XE_LRM "/" PCMK__XE_LRM_RESOURCES  \
+                               "/" PCMK__XE_LRM_RESOURCE                \
+                               "[@" PCMK_XA_ID "='%s']"
+// @TODO could add "and @PCMK_OPT_SHUTDOWN_LOCK" to limit to locks
 
 /*!
  * \internal
@@ -490,7 +486,7 @@ build_parameter_list(const lrmd_event_data_t *op,
 {
     GString *list = NULL;
 
-    *result = create_xml_node(NULL, XML_TAG_PARAMS);
+    *result = pcmk__xe_create(NULL, PCMK_XE_PARAMETERS);
 
     /* Consider all parameters only except private ones to be consistent with
      * what scheduler does with calculate_secure_digest().
@@ -547,7 +543,7 @@ build_parameter_list(const lrmd_event_data_t *op,
 
         } else {
             crm_trace("Removing attr %s from the xml result", param->rap_name);
-            xml_remove_prop(*result, param->rap_name);
+            pcmk__xe_remove_attr(*result, param->rap_name);
         }
     }
 
@@ -574,7 +570,9 @@ append_restart_list(lrmd_event_data_t *op, struct ra_metadata_s *metadata,
     }
 
     if (pcmk_is_set(metadata->ra_flags, ra_supports_reload_agent)) {
-        // Add parameters not marked reloadable to the "op-force-restart" list
+        /* Add parameters not marked reloadable to the PCMK__XA_OP_FORCE_RESTART
+         * list
+         */
         list = build_parameter_list(op, metadata, ra_param_reloadable,
                                     &restart);
 
@@ -583,7 +581,7 @@ append_restart_list(lrmd_event_data_t *op, struct ra_metadata_s *metadata,
          *
          * Before OCF 1.1, Pacemaker abused "unique=0" to indicate
          * reloadability. Add any parameters with unique="1" to the
-         * "op-force-restart" list.
+         * PCMK__XA_OP_FORCE_RESTART list.
          */
         list = build_parameter_list(op, metadata, ra_param_unique, &restart);
 
@@ -593,11 +591,13 @@ append_restart_list(lrmd_event_data_t *op, struct ra_metadata_s *metadata,
     }
 
     digest = calculate_operation_digest(restart, version);
-    /* Add "op-force-restart" and "op-restart-digest" to indicate the resource supports reload,
-     * no matter if it actually supports any parameters with unique="1"). */
-    crm_xml_add(update, XML_LRM_ATTR_OP_RESTART,
+    /* Add PCMK__XA_OP_FORCE_RESTART and PCMK__XA_OP_RESTART_DIGEST to indicate
+     * the resource supports reload, no matter if it actually supports any
+     * reloadable parameters
+     */
+    crm_xml_add(update, PCMK__XA_OP_FORCE_RESTART,
                 (list == NULL)? "" : (const char *) list->str);
-    crm_xml_add(update, XML_LRM_ATTR_RESTART_DIGEST, digest);
+    crm_xml_add(update, PCMK__XA_OP_RESTART_DIGEST, digest);
 
     if ((list != NULL) && (list->len > 0)) {
         crm_trace("%s: %s, %s", op->rsc_id, digest, (const char *) list->str);
@@ -622,17 +622,16 @@ append_secure_list(lrmd_event_data_t *op, struct ra_metadata_s *metadata,
 
     CRM_LOG_ASSERT(op->params != NULL);
 
-    /*
-     * To keep XML_LRM_ATTR_OP_SECURE short, we want it to contain the
-     * secure parameters but XML_LRM_ATTR_SECURE_DIGEST to be based on
-     * the insecure ones
+    /* To keep PCMK__XA_OP_SECURE_PARAMS short, we want it to contain the secure
+     * parameters but PCMK__XA_OP_SECURE_DIGEST to be based on the insecure ones
      */
     list = build_parameter_list(op, metadata, ra_param_private, &secure);
 
     if (list != NULL) {
         digest = calculate_operation_digest(secure, version);
-        crm_xml_add(update, XML_LRM_ATTR_OP_SECURE, (const char *) list->str);
-        crm_xml_add(update, XML_LRM_ATTR_SECURE_DIGEST, digest);
+        crm_xml_add(update, PCMK__XA_OP_SECURE_PARAMS,
+                    (const char *) list->str);
+        crm_xml_add(update, PCMK__XA_OP_SECURE_DIGEST, digest);
 
         crm_trace("%s: %s, %s", op->rsc_id, digest, (const char *) list->str);
         g_string_free(list, TRUE);
@@ -672,7 +671,7 @@ controld_add_resource_history_xml_as(const char *func, xmlNode *parent,
 
     target_rc = rsc_op_expected_rc(op);
 
-    caller_version = g_hash_table_lookup(op->params, XML_ATTR_CRM_VERSION);
+    caller_version = g_hash_table_lookup(op->params, PCMK_XA_CRM_FEATURE_SET);
     CRM_CHECK(caller_version != NULL, caller_version = CRM_FEATURE_SET);
 
     xml_op = pcmk__create_history_xml(parent, op, caller_version, target_rc,
@@ -742,8 +741,8 @@ controld_record_pending_op(const char *node_name, const lrmd_rsc_info_t *rsc,
         return false;
     }
 
-    // Check action's record-pending meta-attribute (defaults to true)
-    record_pending = crm_meta_value(op->params, XML_OP_ATTR_PENDING);
+    // Check action's PCMK_META_RECORD_PENDING meta-attribute (defaults to true)
+    record_pending = crm_meta_value(op->params, PCMK_META_RECORD_PENDING);
     if ((record_pending != NULL) && !crm_is_true(record_pending)) {
         return false;
     }
@@ -890,34 +889,34 @@ controld_update_resource_history(const char *node_name,
     }
 
     // <status>
-    update = create_xml_node(NULL, XML_CIB_TAG_STATUS);
+    update = pcmk__xe_create(NULL, PCMK_XE_STATUS);
 
     //   <node_state ...>
-    xml = create_xml_node(update, XML_CIB_TAG_STATE);
+    xml = pcmk__xe_create(update, PCMK__XE_NODE_STATE);
     if (pcmk__str_eq(node_name, controld_globals.our_nodename,
                      pcmk__str_casei)) {
         node_id = controld_globals.our_uuid;
     } else {
         node_id = node_name;
-        pcmk__xe_set_bool_attr(xml, XML_NODE_IS_REMOTE, true);
+        pcmk__xe_set_bool_attr(xml, PCMK_XA_REMOTE_NODE, true);
     }
-    crm_xml_add(xml, XML_ATTR_ID, node_id);
-    crm_xml_add(xml, XML_ATTR_UNAME, node_name);
-    crm_xml_add(xml, XML_ATTR_ORIGIN, __func__);
+    crm_xml_add(xml, PCMK_XA_ID, node_id);
+    crm_xml_add(xml, PCMK_XA_UNAME, node_name);
+    crm_xml_add(xml, PCMK_XA_CRM_DEBUG_ORIGIN, __func__);
 
     //     <lrm ...>
-    xml = create_xml_node(xml, XML_CIB_TAG_LRM);
-    crm_xml_add(xml, XML_ATTR_ID, node_id);
+    xml = pcmk__xe_create(xml, PCMK__XE_LRM);
+    crm_xml_add(xml, PCMK_XA_ID, node_id);
 
     //       <lrm_resources>
-    xml = create_xml_node(xml, XML_LRM_TAG_RESOURCES);
+    xml = pcmk__xe_create(xml, PCMK__XE_LRM_RESOURCES);
 
     //         <lrm_resource ...>
-    xml = create_xml_node(xml, XML_LRM_TAG_RESOURCE);
-    crm_xml_add(xml, XML_ATTR_ID, op->rsc_id);
-    crm_xml_add(xml, XML_AGENT_ATTR_CLASS, rsc->standard);
-    crm_xml_add(xml, XML_AGENT_ATTR_PROVIDER, rsc->provider);
-    crm_xml_add(xml, XML_ATTR_TYPE, rsc->type);
+    xml = pcmk__xe_create(xml, PCMK__XE_LRM_RESOURCE);
+    crm_xml_add(xml, PCMK_XA_ID, op->rsc_id);
+    crm_xml_add(xml, PCMK_XA_CLASS, rsc->standard);
+    crm_xml_add(xml, PCMK_XA_PROVIDER, rsc->provider);
+    crm_xml_add(xml, PCMK_XA_TYPE, rsc->type);
     if (lock_time != 0) {
         /* Actions on a locked resource should either preserve the lock by
          * recording it with the action result, or clear it.
@@ -925,16 +924,15 @@ controld_update_resource_history(const char *node_name,
         if (!should_preserve_lock(op)) {
             lock_time = 0;
         }
-        crm_xml_add_ll(xml, XML_CONFIG_ATTR_SHUTDOWN_LOCK,
-                       (long long) lock_time);
+        crm_xml_add_ll(xml, PCMK_OPT_SHUTDOWN_LOCK, (long long) lock_time);
     }
     if (op->params != NULL) {
         container = g_hash_table_lookup(op->params,
-                                        CRM_META "_" XML_RSC_ATTR_CONTAINER);
+                                        CRM_META "_" PCMK__META_CONTAINER);
         if (container != NULL) {
             crm_trace("Resource %s is a part of container resource %s",
                       op->rsc_id, container);
-            crm_xml_add(xml, XML_RSC_ATTR_CONTAINER, container);
+            crm_xml_add(xml, PCMK__META_CONTAINER, container);
         }
     }
 
@@ -946,7 +944,7 @@ controld_update_resource_history(const char *node_name,
      * fenced for running a resource it isn't.
      */
     crm_log_xml_trace(update, __func__);
-    controld_update_cib(XML_CIB_TAG_STATUS, update, call_opt, cib_rsc_callback);
+    controld_update_cib(PCMK_XE_STATUS, update, call_opt, cib_rsc_callback);
     free_xml(update);
 }
 
@@ -963,15 +961,15 @@ controld_delete_action_history(const lrmd_event_data_t *op)
 
     CRM_CHECK(op != NULL, return);
 
-    xml_top = create_xml_node(NULL, XML_LRM_TAG_RSC_OP);
-    crm_xml_add_int(xml_top, XML_LRM_ATTR_CALLID, op->call_id);
-    crm_xml_add(xml_top, XML_ATTR_TRANSITION_KEY, op->user_data);
+    xml_top = pcmk__xe_create(NULL, PCMK__XE_LRM_RSC_OP);
+    crm_xml_add_int(xml_top, PCMK__XA_CALL_ID, op->call_id);
+    crm_xml_add(xml_top, PCMK__XA_TRANSITION_KEY, op->user_data);
 
     if (op->interval_ms > 0) {
         char *op_id = pcmk__op_key(op->rsc_id, op->op_type, op->interval_ms);
 
         /* Avoid deleting last_failure too (if it was a result of this recurring op failing) */
-        crm_xml_add(xml_top, XML_ATTR_ID, op_id);
+        crm_xml_add(xml_top, PCMK_XA_ID, op_id);
         free(op_id);
     }
 
@@ -979,31 +977,29 @@ controld_delete_action_history(const lrmd_event_data_t *op)
               op->rsc_id, op->op_type, op->interval_ms, op->call_id);
 
     controld_globals.cib_conn->cmds->remove(controld_globals.cib_conn,
-                                            XML_CIB_TAG_STATUS, xml_top,
-                                            cib_none);
+                                            PCMK_XE_STATUS, xml_top, cib_none);
     crm_log_xml_trace(xml_top, "op:cancel");
     free_xml(xml_top);
 }
 
 /* Define xpath to find LRM resource history entry by node and resource */
 #define XPATH_HISTORY                                   \
-    "/" XML_TAG_CIB "/" XML_CIB_TAG_STATUS              \
-    "/" XML_CIB_TAG_STATE "[@" XML_ATTR_UNAME "='%s']"  \
-    "/" XML_CIB_TAG_LRM "/" XML_LRM_TAG_RESOURCES       \
-    "/" XML_LRM_TAG_RESOURCE "[@" XML_ATTR_ID "='%s']"  \
-    "/" XML_LRM_TAG_RSC_OP
+    "/" PCMK_XE_CIB "/" PCMK_XE_STATUS                  \
+    "/" PCMK__XE_NODE_STATE "[@" PCMK_XA_UNAME "='%s']" \
+    "/" PCMK__XE_LRM "/" PCMK__XE_LRM_RESOURCES         \
+    "/" PCMK__XE_LRM_RESOURCE "[@" PCMK_XA_ID "='%s']"  \
+    "/" PCMK__XE_LRM_RSC_OP
 
 /* ... and also by operation key */
-#define XPATH_HISTORY_ID XPATH_HISTORY \
-    "[@" XML_ATTR_ID "='%s']"
+#define XPATH_HISTORY_ID XPATH_HISTORY "[@" PCMK_XA_ID "='%s']"
 
 /* ... and also by operation key and operation call ID */
 #define XPATH_HISTORY_CALL XPATH_HISTORY \
-    "[@" XML_ATTR_ID "='%s' and @" XML_LRM_ATTR_CALLID "='%d']"
+    "[@" PCMK_XA_ID "='%s' and @" PCMK__XA_CALL_ID "='%d']"
 
 /* ... and also by operation key and original operation key */
 #define XPATH_HISTORY_ORIG XPATH_HISTORY \
-    "[@" XML_ATTR_ID "='%s' and @" XML_LRM_ATTR_TASK_KEY "='%s']"
+    "[@" PCMK_XA_ID "='%s' and @" PCMK__XA_OPERATION_KEY "='%s']"
 
 /*!
  * \internal
diff --git a/daemons/controld/controld_cib.h b/daemons/controld/controld_cib.h
index dcc5a48..9a8d6ac 100644
--- a/daemons/controld/controld_cib.h
+++ b/daemons/controld/controld_cib.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -16,7 +16,7 @@
 
 #include <crm/crm.h>
 #include <crm/common/xml.h>
-#include <crm/cib/internal.h>   // PCMK__CIB_REQUEST_MODIFY
+#include <crm/cib/internal.h>   // cib__*
 #include "controld_globals.h"   // controld_globals.cib_conn
 
 static inline void
@@ -48,7 +48,7 @@ int controld_update_cib(const char *section, xmlNode *data, int options,
                                          void *));
 unsigned int cib_op_timeout(void);
 
-// Subsections of node_state
+// Subsections of PCMK__XE_NODE_STATE
 enum controld_section_e {
     controld_section_lrm,
     controld_section_lrm_unlocked,
diff --git a/daemons/controld/controld_control.c b/daemons/controld/controld_control.c
index 644d686..368659b 100644
--- a/daemons/controld/controld_control.c
+++ b/daemons/controld/controld_control.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,7 @@
 #include <sys/stat.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 #include <crm/pengine/rules.h>
 #include <crm/cluster/internal.h>
 #include <crm/cluster/election_internal.h>
@@ -27,10 +27,10 @@ static qb_ipcs_service_t *ipcs = NULL;
 static crm_trigger_t *config_read_trigger = NULL;
 
 #if SUPPORT_COROSYNC
-extern gboolean crm_connect_corosync(crm_cluster_t * cluster);
+extern gboolean crm_connect_corosync(pcmk_cluster_t *cluster);
 #endif
 
-void crm_shutdown(int nsig);
+static void crm_shutdown(int nsig);
 static gboolean crm_read_options(gpointer user_data);
 
 /*	 A_HA_CONNECT	*/
@@ -41,25 +41,25 @@ do_ha_control(long long action,
               enum crmd_fsa_input current_input, fsa_data_t * msg_data)
 {
     gboolean registered = FALSE;
-    static crm_cluster_t *cluster = NULL;
+    static pcmk_cluster_t *cluster = NULL;
 
     if (cluster == NULL) {
         cluster = pcmk_cluster_new();
     }
 
     if (action & A_HA_DISCONNECT) {
-        crm_cluster_disconnect(cluster);
+        pcmk_cluster_disconnect(cluster);
         crm_info("Disconnected from the cluster");
 
         controld_set_fsa_input_flags(R_HA_DISCONNECTED);
     }
 
     if (action & A_HA_CONNECT) {
-        crm_set_status_callback(&peer_update_callback);
-        crm_set_autoreap(FALSE);
+        pcmk__cluster_set_status_callback(&peer_update_callback);
+        pcmk__cluster_set_autoreap(false);
 
 #if SUPPORT_COROSYNC
-        if (is_corosync_cluster()) {
+        if (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync) {
             registered = crm_connect_corosync(cluster);
         }
 #endif // SUPPORT_COROSYNC
@@ -117,7 +117,7 @@ do_shutdown_req(long long action,
              pcmk__s(controld_globals.dc_name, "not set"));
     msg = create_request(CRM_OP_SHUTDOWN_REQ, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL);
 
-    if (send_cluster_message(NULL, crm_msg_crmd, msg, TRUE) == FALSE) {
+    if (!pcmk__cluster_send_message(NULL, crm_msg_crmd, msg)) {
         register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
     }
     free_xml(msg);
@@ -241,7 +241,7 @@ crmd_exit(crm_exit_t exit_code)
     controld_destroy_transition_trigger();
 
     pcmk__client_cleanup();
-    crm_peer_destroy();
+    pcmk__cluster_destroy_node_caches();
 
     controld_free_fsa_timers();
     te_cleanup_stonith_history_sync(NULL, TRUE);
@@ -365,7 +365,7 @@ accept_controller_client(qb_ipcs_connection_t *c, uid_t uid, gid_t gid)
 {
     crm_trace("Accepting new IPC client connection");
     if (pcmk__new_client(c, uid, gid) == NULL) {
-        return -EIO;
+        return -ENOMEM;
     }
     return 0;
 }
@@ -381,15 +381,17 @@ dispatch_controller_ipc(qb_ipcs_connection_t * c, void *data, size_t size)
     xmlNode *msg = pcmk__client_data2xml(client, data, &id, &flags);
 
     if (msg == NULL) {
-        pcmk__ipc_send_ack(client, id, flags, "ack", NULL, CRM_EX_PROTOCOL);
+        pcmk__ipc_send_ack(client, id, flags, PCMK__XE_ACK, NULL,
+                           CRM_EX_PROTOCOL);
         return 0;
     }
-    pcmk__ipc_send_ack(client, id, flags, "ack", NULL, CRM_EX_INDETERMINATE);
+    pcmk__ipc_send_ack(client, id, flags, PCMK__XE_ACK, NULL,
+                       CRM_EX_INDETERMINATE);
 
     CRM_ASSERT(client->user != NULL);
-    pcmk__update_acl_user(msg, F_CRM_USER, client->user);
+    pcmk__update_acl_user(msg, PCMK__XA_CRM_USER, client->user);
 
-    crm_xml_add(msg, F_CRM_SYS_FROM, client->id);
+    crm_xml_add(msg, PCMK__XA_CRM_SYS_FROM, client->id);
     if (controld_authorize_ipc_message(msg, client, NULL)) {
         crm_trace("Processing IPC message from client %s",
                   pcmk__client_name(client));
@@ -515,194 +517,6 @@ do_recover(long long action,
     register_fsa_input(C_FSA_INTERNAL, I_TERMINATE, NULL);
 }
 
-static pcmk__cluster_option_t controller_options[] = {
-    /* name, old name, type, allowed values,
-     * default value, validator,
-     * short description,
-     * long description
-     */
-    {
-        "dc-version", NULL, "string", NULL, PCMK__VALUE_NONE, NULL,
-        N_("Pacemaker version on cluster node elected Designated Controller (DC)"),
-        N_("Includes a hash which identifies the exact changeset the code was "
-            "built from. Used for diagnostic purposes.")
-    },
-    {
-        "cluster-infrastructure", NULL, "string", NULL, "corosync", NULL,
-        N_("The messaging stack on which Pacemaker is currently running"),
-        N_("Used for informational and diagnostic purposes.")
-    },
-    {
-        "cluster-name", NULL, "string", NULL, NULL, NULL,
-        N_("An arbitrary name for the cluster"),
-        N_("This optional value is mostly for users' convenience as desired "
-            "in administration, but may also be used in Pacemaker "
-            "configuration rules via the #cluster-name node attribute, and "
-            "by higher-level tools and resource agents.")
-    },
-    {
-        XML_CONFIG_ATTR_DC_DEADTIME, NULL, "time",
-        NULL, "20s", pcmk__valid_interval_spec,
-        N_("How long to wait for a response from other nodes during start-up"),
-        N_("The optimal value will depend on the speed and load of your network "
-            "and the type of switches used.")
-    },
-    {
-        XML_CONFIG_ATTR_RECHECK, NULL, "time",
-        N_("Zero disables polling, while positive values are an interval in seconds"
-            "(unless other units are specified, for example \"5min\")"),
-        "15min", pcmk__valid_interval_spec,
-        N_("Polling interval to recheck cluster state and evaluate rules "
-            "with date specifications"),
-        N_("Pacemaker is primarily event-driven, and looks ahead to know when to "
-            "recheck cluster state for failure timeouts and most time-based "
-            "rules. However, it will also recheck the cluster after this "
-            "amount of inactivity, to evaluate rules with date specifications "
-            "and serve as a fail-safe for certain types of scheduler bugs.")
-    },
-    {
-        "load-threshold", NULL, "percentage", NULL,
-        "80%", pcmk__valid_percentage,
-        N_("Maximum amount of system load that should be used by cluster nodes"),
-        N_("The cluster will slow down its recovery process when the amount of "
-            "system resources used (currently CPU) approaches this limit"),
-    },
-    {
-        "node-action-limit", NULL, "integer", NULL,
-        "0", pcmk__valid_number,
-        N_("Maximum number of jobs that can be scheduled per node "
-            "(defaults to 2x cores)")
-    },
-    { XML_CONFIG_ATTR_FENCE_REACTION, NULL, "string", NULL, "stop", NULL,
-        N_("How a cluster node should react if notified of its own fencing"),
-        N_("A cluster node may receive notification of its own fencing if fencing "
-        "is misconfigured, or if fabric fencing is in use that doesn't cut "
-        "cluster communication. Allowed values are \"stop\" to attempt to "
-        "immediately stop Pacemaker and stay stopped, or \"panic\" to attempt "
-        "to immediately reboot the local node, falling back to stop on failure.")
-    },
-    {
-        XML_CONFIG_ATTR_ELECTION_FAIL, NULL, "time", NULL,
-        "2min", pcmk__valid_interval_spec,
-        "*** Advanced Use Only ***",
-        N_("Declare an election failed if it is not decided within this much "
-            "time. If you need to adjust this value, it probably indicates "
-            "the presence of a bug.")
-    },
-    {
-        XML_CONFIG_ATTR_FORCE_QUIT, NULL, "time", NULL,
-        "20min", pcmk__valid_interval_spec,
-        "*** Advanced Use Only ***",
-        N_("Exit immediately if shutdown does not complete within this much "
-            "time. If you need to adjust this value, it probably indicates "
-            "the presence of a bug.")
-    },
-    {
-        "join-integration-timeout", "crmd-integration-timeout", "time", NULL,
-        "3min", pcmk__valid_interval_spec,
-        "*** Advanced Use Only ***",
-        N_("If you need to adjust this value, it probably indicates "
-            "the presence of a bug.")
-    },
-    {
-        "join-finalization-timeout", "crmd-finalization-timeout", "time", NULL,
-        "30min", pcmk__valid_interval_spec,
-        "*** Advanced Use Only ***",
-        N_("If you need to adjust this value, it probably indicates "
-            "the presence of a bug.")
-    },
-    {
-        "transition-delay", "crmd-transition-delay", "time", NULL,
-        "0s", pcmk__valid_interval_spec,
-        N_("*** Advanced Use Only *** Enabling this option will slow down "
-            "cluster recovery under all conditions"),
-        N_("Delay cluster recovery for this much time to allow for additional "
-            "events to occur. Useful if your configuration is sensitive to "
-            "the order in which ping updates arrive.")
-    },
-    {
-        "stonith-watchdog-timeout", NULL, "time", NULL,
-        "0", controld_verify_stonith_watchdog_timeout,
-        N_("How long before nodes can be assumed to be safely down when "
-           "watchdog-based self-fencing via SBD is in use"),
-        N_("If this is set to a positive value, lost nodes are assumed to "
-           "self-fence using watchdog-based SBD within this much time. This "
-           "does not require a fencing resource to be explicitly configured, "
-           "though a fence_watchdog resource can be configured, to limit use "
-           "to specific nodes. If this is set to 0 (the default), the cluster "
-           "will never assume watchdog-based self-fencing. If this is set to a "
-           "negative value, the cluster will use twice the local value of the "
-           "`SBD_WATCHDOG_TIMEOUT` environment variable if that is positive, "
-           "or otherwise treat this as 0. WARNING: When used, this timeout "
-           "must be larger than `SBD_WATCHDOG_TIMEOUT` on all nodes that use "
-           "watchdog-based SBD, and Pacemaker will refuse to start on any of "
-           "those nodes where this is not true for the local value or SBD is "
-           "not active. When this is set to a negative value, "
-           "`SBD_WATCHDOG_TIMEOUT` must be set to the same value on all nodes "
-           "that use SBD, otherwise data corruption or loss could occur.")
-    },
-    {
-        "stonith-max-attempts", NULL, "integer", NULL,
-        "10", pcmk__valid_positive_number,
-        N_("How many times fencing can fail before it will no longer be "
-            "immediately re-attempted on a target")
-    },
-
-    // Already documented in libpe_status (other values must be kept identical)
-    {
-        "no-quorum-policy", NULL, "select",
-        "stop, freeze, ignore, demote, suicide", "stop", pcmk__valid_quorum,
-        N_("What to do when the cluster does not have quorum"), NULL
-    },
-    {
-        XML_CONFIG_ATTR_SHUTDOWN_LOCK, NULL, "boolean", NULL,
-        "false", pcmk__valid_boolean,
-        N_("Whether to lock resources to a cleanly shut down node"),
-        N_("When true, resources active on a node when it is cleanly shut down "
-            "are kept \"locked\" to that node (not allowed to run elsewhere) "
-            "until they start again on that node after it rejoins (or for at "
-            "most shutdown-lock-limit, if set). Stonith resources and "
-            "Pacemaker Remote connections are never locked. Clone and bundle "
-            "instances and the promoted role of promotable clones are "
-            "currently never locked, though support could be added in a future "
-            "release.")
-    },
-    {
-        XML_CONFIG_ATTR_SHUTDOWN_LOCK_LIMIT, NULL, "time", NULL,
-        "0", pcmk__valid_interval_spec,
-        N_("Do not lock resources to a cleanly shut down node longer than "
-           "this"),
-        N_("If shutdown-lock is true and this is set to a nonzero time "
-            "duration, shutdown locks will expire after this much time has "
-            "passed since the shutdown was initiated, even if the node has not "
-            "rejoined.")
-    },
-    {
-        XML_CONFIG_ATTR_NODE_PENDING_TIMEOUT, NULL, "time", NULL,
-        "0", pcmk__valid_interval_spec,
-        N_("How long to wait for a node that has joined the cluster to join "
-           "the controller process group"),
-        N_("Fence nodes that do not join the controller process group within "
-           "this much time after joining the cluster, to allow the cluster "
-           "to continue managing resources. A value of 0 means never fence " 
-           "pending nodes. Setting the value to 2h means fence nodes after "
-           "2 hours.")
-    },
-};
-
-void
-crmd_metadata(void)
-{
-    const char *desc_short = "Pacemaker controller options";
-    const char *desc_long = "Cluster options used by Pacemaker's controller";
-
-    gchar *s = pcmk__format_option_metadata("pacemaker-controld", desc_short,
-                                            desc_long, controller_options,
-                                            PCMK__NELEM(controller_options));
-    printf("%s", s);
-    g_free(s);
-}
-
 static void
 config_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
 {
@@ -726,49 +540,62 @@ config_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void
     }
 
     crmconfig = output;
-    if ((crmconfig != NULL)
-        && !pcmk__xe_is(crmconfig, XML_CIB_TAG_CRMCONFIG)) {
-        crmconfig = first_named_child(crmconfig, XML_CIB_TAG_CRMCONFIG);
+    if ((crmconfig != NULL) && !pcmk__xe_is(crmconfig, PCMK_XE_CRM_CONFIG)) {
+        crmconfig = pcmk__xe_first_child(crmconfig, PCMK_XE_CRM_CONFIG, NULL,
+                                         NULL);
     }
     if (!crmconfig) {
         fsa_data_t *msg_data = NULL;
 
-        crm_err("Local CIB query for " XML_CIB_TAG_CRMCONFIG " section failed");
+        crm_err("Local CIB query for " PCMK_XE_CRM_CONFIG " section failed");
         register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
         goto bail;
     }
 
     crm_debug("Call %d : Parsing CIB options", call_id);
     config_hash = pcmk__strkey_table(free, free);
-    pe_unpack_nvpairs(crmconfig, crmconfig, XML_CIB_TAG_PROPSET, NULL,
-                      config_hash, CIB_OPTIONS_FIRST, FALSE, now, NULL);
+    pe_unpack_nvpairs(crmconfig, crmconfig, PCMK_XE_CLUSTER_PROPERTY_SET, NULL,
+                      config_hash, PCMK_VALUE_CIB_BOOTSTRAP_OPTIONS, FALSE, now,
+                      NULL);
 
     // Validate all options, and use defaults if not already present in hash
-    pcmk__validate_cluster_options(config_hash, controller_options,
-                                   PCMK__NELEM(controller_options));
+    pcmk__validate_cluster_options(config_hash);
 
-    value = g_hash_table_lookup(config_hash, "no-quorum-policy");
-    if (pcmk__str_eq(value, "suicide", pcmk__str_casei) && pcmk__locate_sbd()) {
+    /* Validate the watchdog timeout in the context of the local node
+     * environment. If invalid, the controller will exit with a fatal error.
+     *
+     * We do this via a wrapper in the controller, so that we call
+     * pcmk__valid_stonith_watchdog_timeout() only if watchdog fencing is
+     * enabled for the local node. Otherwise, we may exit unnecessarily.
+     *
+     * A validator function in libcrmcommon can't act as such a wrapper, because
+     * it doesn't have a stonith API connection or the local node name.
+     */
+    value = g_hash_table_lookup(config_hash, PCMK_OPT_STONITH_WATCHDOG_TIMEOUT);
+    controld_verify_stonith_watchdog_timeout(value);
+
+    value = g_hash_table_lookup(config_hash, PCMK_OPT_NO_QUORUM_POLICY);
+    if (pcmk__str_eq(value, PCMK_VALUE_FENCE_LEGACY, pcmk__str_casei)
+        && (pcmk__locate_sbd() != 0)) {
         controld_set_global_flags(controld_no_quorum_suicide);
     }
 
-    value = g_hash_table_lookup(config_hash, XML_CONFIG_ATTR_SHUTDOWN_LOCK);
+    value = g_hash_table_lookup(config_hash, PCMK_OPT_SHUTDOWN_LOCK);
     if (crm_is_true(value)) {
         controld_set_global_flags(controld_shutdown_lock_enabled);
     } else {
         controld_clear_global_flags(controld_shutdown_lock_enabled);
     }
 
-    value = g_hash_table_lookup(config_hash,
-                                XML_CONFIG_ATTR_SHUTDOWN_LOCK_LIMIT);
-    controld_globals.shutdown_lock_limit = crm_parse_interval_spec(value)
-                                           / 1000;
+    value = g_hash_table_lookup(config_hash, PCMK_OPT_SHUTDOWN_LOCK_LIMIT);
+    pcmk_parse_interval_spec(value, &controld_globals.shutdown_lock_limit);
+    controld_globals.shutdown_lock_limit /= 1000;
 
-    value = g_hash_table_lookup(config_hash,
-                                XML_CONFIG_ATTR_NODE_PENDING_TIMEOUT);
-    controld_globals.node_pending_timeout = crm_parse_interval_spec(value) / 1000;
+    value = g_hash_table_lookup(config_hash, PCMK_OPT_NODE_PENDING_TIMEOUT);
+    pcmk_parse_interval_spec(value, &controld_globals.node_pending_timeout);
+    controld_globals.node_pending_timeout /= 1000;
 
-    value = g_hash_table_lookup(config_hash, "cluster-name");
+    value = g_hash_table_lookup(config_hash, PCMK_OPT_CLUSTER_NAME);
     pcmk__str_update(&(controld_globals.cluster_name), value);
 
     // Let subcomponents initialize their own static variables
@@ -777,7 +604,7 @@ config_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void
     controld_configure_fsa_timers(config_hash);
     controld_configure_throttle(config_hash);
 
-    alerts = first_named_child(output, XML_CIB_TAG_ALERTS);
+    alerts = pcmk__xe_first_child(output, PCMK_XE_ALERTS, NULL, NULL);
     crmd_unpack_alerts(alerts);
 
     controld_set_fsa_input_flags(R_READ_CONFIG);
@@ -809,8 +636,8 @@ crm_read_options(gpointer user_data)
 {
     cib_t *cib_conn = controld_globals.cib_conn;
     int call_id = cib_conn->cmds->query(cib_conn,
-                                        "//" XML_CIB_TAG_CRMCONFIG
-                                        " | //" XML_CIB_TAG_ALERTS,
+                                        "//" PCMK_XE_CRM_CONFIG
+                                        " | //" PCMK_XE_ALERTS,
                                         NULL, cib_xpath|cib_scope_local);
 
     fsa_register_cib_callback(call_id, NULL, config_query_callback);
@@ -829,7 +656,7 @@ do_read_config(long long action,
     controld_trigger_config();
 }
 
-void
+static void
 crm_shutdown(int nsig)
 {
     const char *value = NULL;
@@ -856,9 +683,7 @@ crm_shutdown(int nsig)
      * config_query_callback() has been run at least once, it doesn't look like
      * anything could have changed the timer period since then.
      */
-    value = pcmk__cluster_option(NULL, controller_options,
-                                 PCMK__NELEM(controller_options),
-                                 XML_CONFIG_ATTR_FORCE_QUIT);
-    default_period_ms = crm_parse_interval_spec(value);
+    value = pcmk__cluster_option(NULL, PCMK_OPT_SHUTDOWN_ESCALATION);
+    pcmk_parse_interval_spec(value, &default_period_ms);
     controld_shutdown_start_countdown(default_period_ms);
 }
diff --git a/daemons/controld/controld_corosync.c b/daemons/controld/controld_corosync.c
index b69e821..d0652e4 100644
--- a/daemons/controld/controld_corosync.c
+++ b/daemons/controld/controld_corosync.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -31,14 +31,14 @@ crmd_cs_dispatch(cpg_handle_t handle, const struct cpg_name *groupName,
 {
     uint32_t kind = 0;
     const char *from = NULL;
-    char *data = pcmk_message_common_cs(handle, nodeid, pid, msg, &kind, &from);
+    char *data = pcmk__cpg_message_data(handle, nodeid, pid, msg, &kind, &from);
 
     if(data == NULL) {
         return;
     }
     if (kind == crm_class_cluster) {
         crm_node_t *peer = NULL;
-        xmlNode *xml = string2xml(data);
+        xmlNode *xml = pcmk__xml_parse(data);
 
         if (xml == NULL) {
             crm_err("Could not parse message content (%d): %.100s", kind, data);
@@ -46,10 +46,9 @@ crmd_cs_dispatch(cpg_handle_t handle, const struct cpg_name *groupName,
             return;
         }
 
-        crm_xml_add(xml, F_ORIG, from);
-        /* crm_xml_add_int(xml, F_SEQ, wrapper->id); Fake? */
+        crm_xml_add(xml, PCMK__XA_SRC, from);
 
-        peer = crm_get_peer(0, from);
+        peer = pcmk__get_node(0, from, NULL, pcmk__node_search_cluster_member);
         if (!pcmk_is_set(peer->processes, crm_proc_cpg)) {
             /* If we can still talk to our peer process on that node,
              * then it must be part of the corosync membership
@@ -57,7 +56,7 @@ crmd_cs_dispatch(cpg_handle_t handle, const struct cpg_name *groupName,
             crm_warn("Receiving messages from a node we think is dead: %s[%d]",
                      peer->uname, peer->id);
             crm_update_peer_proc(__func__, peer, crm_proc_cpg,
-                                 ONLINESTATUS);
+                                 PCMK_VALUE_ONLINE);
         }
         crmd_ha_msg_filter(xml);
         free_xml(xml);
@@ -119,8 +118,8 @@ cpg_membership_callback(cpg_handle_t handle, const struct cpg_name *cpg_name,
     if (controld_globals.dc_name != NULL) {
         crm_node_t *peer = NULL;
 
-        peer = pcmk__search_cluster_node_cache(0, controld_globals.dc_name,
-                                               NULL);
+        peer = pcmk__search_node_caches(0, controld_globals.dc_name,
+                                        pcmk__node_search_cluster_member);
         if (peer != NULL) {
             for (int i = 0; i < left_list_entries; ++i) {
                 if (left_list[i].nodeid == peer->id) {
@@ -132,25 +131,26 @@ cpg_membership_callback(cpg_handle_t handle, const struct cpg_name *cpg_name,
     }
 
     // Process the change normally, which will call the peer callback as needed
-    pcmk_cpg_membership(handle, cpg_name, member_list, member_list_entries,
-                        left_list, left_list_entries,
-                        joined_list, joined_list_entries);
+    pcmk__cpg_confchg_cb(handle, cpg_name, member_list, member_list_entries,
+                         left_list, left_list_entries,
+                         joined_list, joined_list_entries);
 
     controld_clear_global_flags(controld_dc_left);
 }
 
-extern gboolean crm_connect_corosync(crm_cluster_t * cluster);
+extern gboolean crm_connect_corosync(pcmk_cluster_t *cluster);
 
 gboolean
-crm_connect_corosync(crm_cluster_t * cluster)
+crm_connect_corosync(pcmk_cluster_t *cluster)
 {
-    if (is_corosync_cluster()) {
-        crm_set_status_callback(&peer_update_callback);
-        cluster->cpg.cpg_deliver_fn = crmd_cs_dispatch;
-        cluster->cpg.cpg_confchg_fn = cpg_membership_callback;
-        cluster->destroy = crmd_cs_destroy;
+    if (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync) {
+        pcmk__cluster_set_status_callback(&peer_update_callback);
 
-        if (crm_cluster_connect(cluster)) {
+        pcmk_cluster_set_destroy_fn(cluster, crmd_cs_destroy);
+        pcmk_cpg_set_deliver_fn(cluster, crmd_cs_dispatch);
+        pcmk_cpg_set_confchg_fn(cluster, cpg_membership_callback);
+
+        if (pcmk_cluster_connect(cluster) == pcmk_rc_ok) {
             pcmk__corosync_quorum_connect(crmd_quorum_callback,
                                           crmd_cs_destroy);
             return TRUE;
diff --git a/daemons/controld/controld_election.c b/daemons/controld/controld_election.c
index 70ffecc..1d4ff25 100644
--- a/daemons/controld/controld_election.c
+++ b/daemons/controld/controld_election.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -12,7 +12,6 @@
 #include <sys/time.h>
 #include <sys/resource.h>
 
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/cluster/internal.h>
 #include <crm/cluster/election_internal.h>
@@ -44,10 +43,11 @@ controld_election_init(const char *uname)
 void
 controld_configure_election(GHashTable *options)
 {
-    const char *value = NULL;
+    const char *value = g_hash_table_lookup(options, PCMK_OPT_ELECTION_TIMEOUT);
+    guint interval_ms = 0U;
 
-    value = g_hash_table_lookup(options, XML_CONFIG_ATTR_ELECTION_FAIL);
-    election_timeout_set_period(fsa_election, crm_parse_interval_spec(value));
+    pcmk_parse_interval_spec(value, &interval_ms);
+    election_timeout_set_period(fsa_election, interval_ms);
 }
 
 void
@@ -201,7 +201,7 @@ feature_update_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, vo
 #define dc_takeover_update_attr(name, value) do {                           \
        cib__update_node_attr(controld_globals.logger_out,                   \
                              controld_globals.cib_conn, cib_none,           \
-                             XML_CIB_TAG_CRMCONFIG, NULL, NULL, NULL, NULL, \
+                             PCMK_XE_CRM_CONFIG, NULL, NULL, NULL, NULL,    \
                              name, value, NULL, NULL);                      \
     } while (0)
 
@@ -213,7 +213,8 @@ do_dc_takeover(long long action,
                enum crmd_fsa_input current_input, fsa_data_t * msg_data)
 {
     xmlNode *cib = NULL;
-    const char *cluster_type = name_for_cluster_type(get_cluster_type());
+    const enum pcmk_cluster_layer cluster_layer = pcmk_get_cluster_layer();
+    const char *cluster_layer_s = pcmk_cluster_layer_text(cluster_layer);
     pid_t watchdog = pcmk__locate_sbd();
 
     crm_info("Taking over DC status for this partition");
@@ -226,20 +227,23 @@ do_dc_takeover(long long action,
     controld_globals.cib_conn->cmds->set_primary(controld_globals.cib_conn,
                                                  cib_scope_local);
 
-    cib = create_xml_node(NULL, XML_TAG_CIB);
-    crm_xml_add(cib, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET);
-    controld_update_cib(XML_TAG_CIB, cib, cib_none, feature_update_callback);
+    cib = pcmk__xe_create(NULL, PCMK_XE_CIB);
+    crm_xml_add(cib, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET);
+    controld_update_cib(PCMK_XE_CIB, cib, cib_none, feature_update_callback);
 
-    dc_takeover_update_attr(XML_ATTR_HAVE_WATCHDOG, pcmk__btoa(watchdog));
-    dc_takeover_update_attr("dc-version", PACEMAKER_VERSION "-" BUILD_VERSION);
-    dc_takeover_update_attr("cluster-infrastructure", cluster_type);
+    dc_takeover_update_attr(PCMK_OPT_HAVE_WATCHDOG, pcmk__btoa(watchdog));
+    dc_takeover_update_attr(PCMK_OPT_DC_VERSION,
+                            PACEMAKER_VERSION "-" BUILD_VERSION);
+    dc_takeover_update_attr(PCMK_OPT_CLUSTER_INFRASTRUCTURE, cluster_layer_s);
 
 #if SUPPORT_COROSYNC
-    if ((controld_globals.cluster_name == NULL) && is_corosync_cluster()) {
+    if ((controld_globals.cluster_name == NULL)
+        && (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync)) {
+
         char *cluster_name = pcmk__corosync_cluster_name();
 
         if (cluster_name != NULL) {
-            dc_takeover_update_attr("cluster-name", cluster_name);
+            dc_takeover_update_attr(PCMK_OPT_CLUSTER_NAME, cluster_name);
         }
         free(cluster_name);
     }
@@ -265,13 +269,15 @@ do_dc_release(long long action,
         crm_info("DC role released");
         if (pcmk_is_set(controld_globals.fsa_input_register, R_SHUTDOWN)) {
             xmlNode *update = NULL;
-            crm_node_t *node = crm_get_peer(0, controld_globals.our_nodename);
+            crm_node_t *node =
+                pcmk__get_node(0, controld_globals.our_nodename,
+                               NULL, pcmk__node_search_cluster_member);
 
             pcmk__update_peer_expected(__func__, node, CRMD_JOINSTATE_DOWN);
             update = create_node_state_update(node, node_update_expected, NULL,
                                               __func__);
             /* Don't need a based response because controld will stop. */
-            fsa_cib_anon_update_discard_reply(XML_CIB_TAG_STATUS, update);
+            fsa_cib_anon_update_discard_reply(PCMK_XE_STATUS, update);
             free_xml(update);
         }
         register_fsa_input(C_FSA_INTERNAL, I_RELEASE_SUCCESS, NULL);
@@ -280,6 +286,5 @@ do_dc_release(long long action,
         crm_err("Unknown DC action %s", fsa_action2string(action));
     }
 
-    crm_trace("Am I still the DC? %s", AM_I_DC ? XML_BOOLEAN_YES : XML_BOOLEAN_NO);
-
+    crm_trace("Am I still the DC? %s", pcmk__btoa(AM_I_DC));
 }
diff --git a/daemons/controld/controld_execd.c b/daemons/controld/controld_execd.c
index 480d37d..917c8c0 100644
--- a/daemons/controld/controld_execd.c
+++ b/daemons/controld/controld_execd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -17,7 +17,6 @@
 #include <crm/crm.h>
 #include <crm/lrmd.h>           // lrmd_event_data_t, lrmd_rsc_info_t, etc.
 #include <crm/services.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/pengine/rules.h>
 #include <crm/lrmd_internal.h>
@@ -68,7 +67,7 @@ static void
 copy_instance_keys(gpointer key, gpointer value, gpointer user_data)
 {
     if (strstr(key, CRM_META "_") == NULL) {
-        g_hash_table_replace(user_data, strdup((const char *)key), strdup((const char *)value));
+        pcmk__insert_dup(user_data, (const char *) key, (const char *) value);
     }
 }
 
@@ -76,7 +75,7 @@ static void
 copy_meta_keys(gpointer key, gpointer value, gpointer user_data)
 {
     if (strstr(key, CRM_META "_") != NULL) {
-        g_hash_table_replace(user_data, strdup((const char *)key), strdup((const char *)value));
+        pcmk__insert_dup(user_data, (const char *) key, (const char *) value);
     }
 }
 
@@ -175,14 +174,14 @@ update_history_cache(lrm_state_t * lrm_state, lrmd_rsc_info_t * rsc, lrmd_event_
 
     entry = g_hash_table_lookup(lrm_state->resource_history, op->rsc_id);
     if (entry == NULL && rsc) {
-        entry = calloc(1, sizeof(rsc_history_t));
-        entry->id = strdup(op->rsc_id);
+        entry = pcmk__assert_alloc(1, sizeof(rsc_history_t));
+        entry->id = pcmk__str_copy(op->rsc_id);
         g_hash_table_insert(lrm_state->resource_history, entry->id, entry);
 
         entry->rsc.id = entry->id;
-        entry->rsc.type = strdup(rsc->type);
-        entry->rsc.standard = strdup(rsc->standard);
-        pcmk__str_update(&entry->rsc.provider, rsc->provider);
+        entry->rsc.type = pcmk__str_copy(rsc->type);
+        entry->rsc.standard = pcmk__str_copy(rsc->standard);
+        entry->rsc.provider = pcmk__str_copy(rsc->provider);
 
     } else if (entry == NULL) {
         crm_info("Resource %s no longer exists, not updating cache", op->rsc_id);
@@ -539,18 +538,21 @@ build_active_RAs(lrm_state_t * lrm_state, xmlNode * rsc_list)
     while (g_hash_table_iter_next(&iter, NULL, (void **)&entry)) {
 
         GList *gIter = NULL;
-        xmlNode *xml_rsc = create_xml_node(rsc_list, XML_LRM_TAG_RESOURCE);
+        xmlNode *xml_rsc = pcmk__xe_create(rsc_list, PCMK__XE_LRM_RESOURCE);
 
-        crm_xml_add(xml_rsc, XML_ATTR_ID, entry->id);
-        crm_xml_add(xml_rsc, XML_ATTR_TYPE, entry->rsc.type);
-        crm_xml_add(xml_rsc, XML_AGENT_ATTR_CLASS, entry->rsc.standard);
-        crm_xml_add(xml_rsc, XML_AGENT_ATTR_PROVIDER, entry->rsc.provider);
+        crm_xml_add(xml_rsc, PCMK_XA_ID, entry->id);
+        crm_xml_add(xml_rsc, PCMK_XA_TYPE, entry->rsc.type);
+        crm_xml_add(xml_rsc, PCMK_XA_CLASS, entry->rsc.standard);
+        crm_xml_add(xml_rsc, PCMK_XA_PROVIDER, entry->rsc.provider);
 
         if (entry->last && entry->last->params) {
-            const char *container = g_hash_table_lookup(entry->last->params, CRM_META"_"XML_RSC_ATTR_CONTAINER);
+            static const char *name = CRM_META "_" PCMK__META_CONTAINER;
+            const char *container = g_hash_table_lookup(entry->last->params,
+                                                        name);
+
             if (container) {
                 crm_trace("Resource %s is a part of container resource %s", entry->id, container);
-                crm_xml_add(xml_rsc, XML_RSC_ATTR_CONTAINER, container);
+                crm_xml_add(xml_rsc, PCMK__META_CONTAINER, container);
             }
         }
         controld_add_resource_history_xml(xml_rsc, &(entry->rsc), entry->failed,
@@ -581,7 +583,7 @@ controld_query_executor_state(void)
         return NULL;
     }
 
-    peer = crm_get_peer_full(0, lrm_state->node_name, CRM_GET_PEER_ANY);
+    peer = pcmk__get_node(0, lrm_state->node_name, NULL, pcmk__node_search_any);
     CRM_CHECK(peer != NULL, return NULL);
 
     xml_state = create_node_state_update(peer,
@@ -591,9 +593,9 @@ controld_query_executor_state(void)
         return NULL;
     }
 
-    xml_data = create_xml_node(xml_state, XML_CIB_TAG_LRM);
-    crm_xml_add(xml_data, XML_ATTR_ID, peer->uuid);
-    rsc_list = create_xml_node(xml_data, XML_LRM_TAG_RESOURCES);
+    xml_data = pcmk__xe_create(xml_state, PCMK__XE_LRM);
+    crm_xml_add(xml_data, PCMK_XA_ID, peer->uuid);
+    rsc_list = pcmk__xe_create(xml_data, PCMK__XE_LRM_RESOURCES);
 
     /* Build a list of active (not always running) resources */
     build_active_RAs(lrm_state, rsc_list);
@@ -651,7 +653,7 @@ controld_trigger_delete_refresh(const char *from_sys, const char *rsc_id)
         crm_debug("Triggering a refresh after %s cleaned %s", from_sys, rsc_id);
         cib__update_node_attr(controld_globals.logger_out,
                               controld_globals.cib_conn, cib_none,
-                              XML_CIB_TAG_CRMCONFIG, NULL, NULL, NULL, NULL,
+                              PCMK_XE_CRM_CONFIG, NULL, NULL, NULL, NULL,
                               "last-lrm-refresh", now_s, NULL, NULL);
         free(now_s);
     }
@@ -661,8 +663,8 @@ static void
 notify_deleted(lrm_state_t * lrm_state, ha_msg_input_t * input, const char *rsc_id, int rc)
 {
     lrmd_event_data_t *op = NULL;
-    const char *from_sys = crm_element_value(input->msg, F_CRM_SYS_FROM);
-    const char *from_host = crm_element_value(input->msg, F_CRM_HOST_FROM);
+    const char *from_sys = crm_element_value(input->msg, PCMK__XA_CRM_SYS_FROM);
+    const char *from_host = crm_element_value(input->msg, PCMK__XA_SRC);
 
     crm_info("Notifying %s on %s that %s was%s deleted",
              from_sys, (from_host? from_host : "localhost"), rsc_id,
@@ -711,7 +713,7 @@ delete_rsc_entry(lrm_state_t *lrm_state, ha_msg_input_t *input,
     CRM_CHECK(rsc_id != NULL, return);
 
     if (rc == pcmk_ok) {
-        char *rsc_id_copy = strdup(rsc_id);
+        char *rsc_id_copy = pcmk__str_copy(rsc_id);
 
         if (rsc_iter) {
             g_hash_table_iter_remove(rsc_iter);
@@ -907,7 +909,7 @@ static int
 get_lrm_resource(lrm_state_t *lrm_state, const xmlNode *rsc_xml,
                  gboolean do_create, lrmd_rsc_info_t **rsc_info)
 {
-    const char *id = ID(rsc_xml);
+    const char *id = pcmk__xe_id(rsc_xml);
 
     CRM_CHECK(lrm_state && rsc_xml && rsc_info, return -EINVAL);
     CRM_CHECK(id, return -EINVAL);
@@ -921,7 +923,7 @@ get_lrm_resource(lrm_state_t *lrm_state, const xmlNode *rsc_xml,
 
     // If resource isn't known by ID, try clone name, if provided
     if (!*rsc_info) {
-        const char *long_id = crm_element_value(rsc_xml, XML_ATTR_ID_LONG);
+        const char *long_id = crm_element_value(rsc_xml, PCMK__XA_LONG_ID);
 
         if (long_id) {
             *rsc_info = lrm_state_get_rsc_info(lrm_state, long_id, 0);
@@ -929,9 +931,9 @@ get_lrm_resource(lrm_state_t *lrm_state, const xmlNode *rsc_xml,
     }
 
     if ((*rsc_info == NULL) && do_create) {
-        const char *class = crm_element_value(rsc_xml, XML_AGENT_ATTR_CLASS);
-        const char *provider = crm_element_value(rsc_xml, XML_AGENT_ATTR_PROVIDER);
-        const char *type = crm_element_value(rsc_xml, XML_ATTR_TYPE);
+        const char *class = crm_element_value(rsc_xml, PCMK_XA_CLASS);
+        const char *provider = crm_element_value(rsc_xml, PCMK_XA_PROVIDER);
+        const char *type = crm_element_value(rsc_xml, PCMK_XA_TYPE);
         int rc;
 
         crm_trace("Registering resource %s with the executor", id);
@@ -979,10 +981,10 @@ delete_resource(lrm_state_t *lrm_state, const char *id, lrmd_rsc_info_t *rsc,
         crm_info("Deletion of resource '%s' from executor is pending", id);
         if (request) {
             struct pending_deletion_op_s *op = NULL;
-            char *ref = crm_element_value_copy(request->msg, XML_ATTR_REFERENCE);
+            char *ref = crm_element_value_copy(request->msg, PCMK_XA_REFERENCE);
 
-            op = calloc(1, sizeof(struct pending_deletion_op_s));
-            op->rsc = strdup(rsc->id);
+            op = pcmk__assert_alloc(1, sizeof(struct pending_deletion_op_s));
+            op->rsc = pcmk__str_copy(rsc->id);
             op->input = copy_ha_msg_input(request);
             g_hash_table_insert(lrm_state->deletion_ops, ref, op);
         }
@@ -1096,25 +1098,26 @@ synthesize_lrmd_failure(lrm_state_t *lrm_state, const xmlNode *action,
                         const char *exit_reason)
 {
     lrmd_event_data_t *op = NULL;
-    const char *operation = crm_element_value(action, XML_LRM_ATTR_TASK);
-    const char *target_node = crm_element_value(action, XML_LRM_ATTR_TARGET);
-    xmlNode *xml_rsc = find_xml_node(action, XML_CIB_TAG_RESOURCE, TRUE);
+    const char *operation = crm_element_value(action, PCMK_XA_OPERATION);
+    const char *target_node = crm_element_value(action, PCMK__META_ON_NODE);
+    xmlNode *xml_rsc = pcmk__xe_first_child(action, PCMK_XE_PRIMITIVE, NULL,
+                                            NULL);
 
-    if ((xml_rsc == NULL) || (ID(xml_rsc) == NULL)) {
+    if ((xml_rsc == NULL) || (pcmk__xe_id(xml_rsc) == NULL)) {
         /* @TODO Should we do something else, like direct ack? */
         crm_info("Can't fake %s failure (%d) on %s without resource configuration",
-                 crm_element_value(action, XML_LRM_ATTR_TASK_KEY), rc,
+                 crm_element_value(action, PCMK__XA_OPERATION_KEY), rc,
                  target_node);
         return;
 
     } else if(operation == NULL) {
         /* This probably came from crm_resource -C, nothing to do */
         crm_info("Can't fake %s failure (%d) on %s without operation",
-                 ID(xml_rsc), rc, target_node);
+                 pcmk__xe_id(xml_rsc), rc, target_node);
         return;
     }
 
-    op = construct_op(lrm_state, action, ID(xml_rsc), operation);
+    op = construct_op(lrm_state, action, pcmk__xe_id(xml_rsc), operation);
 
     if (pcmk__str_eq(operation, PCMK_ACTION_NOTIFY, pcmk__str_casei)) {
         // Notifications can't fail
@@ -1146,7 +1149,7 @@ lrm_op_target(const xmlNode *xml)
     const char *target = NULL;
 
     if (xml) {
-        target = crm_element_value(xml, XML_LRM_ATTR_TARGET);
+        target = crm_element_value(xml, PCMK__META_ON_NODE);
     }
     if (target == NULL) {
         target = controld_globals.our_nodename;
@@ -1160,7 +1163,7 @@ fail_lrm_resource(xmlNode *xml, lrm_state_t *lrm_state, const char *user_name,
 {
     lrmd_event_data_t *op = NULL;
     lrmd_rsc_info_t *rsc = NULL;
-    xmlNode *xml_rsc = find_xml_node(xml, XML_CIB_TAG_RESOURCE, TRUE);
+    xmlNode *xml_rsc = pcmk__xe_first_child(xml, PCMK_XE_PRIMITIVE, NULL, NULL);
 
     CRM_CHECK(xml_rsc != NULL, return);
 
@@ -1172,18 +1175,20 @@ fail_lrm_resource(xmlNode *xml, lrm_state_t *lrm_state, const char *user_name,
      * and pass that event to the executor client callback so it will be
      * processed as if it came from the executor.
      */
-    op = construct_op(lrm_state, xml, ID(xml_rsc), "asyncmon");
+    op = construct_op(lrm_state, xml, pcmk__xe_id(xml_rsc), "asyncmon");
 
     free((char*) op->user_data);
     op->user_data = NULL;
     op->interval_ms = 0;
 
     if (user_name && !pcmk__is_privileged(user_name)) {
-        crm_err("%s does not have permission to fail %s", user_name, ID(xml_rsc));
+        crm_err("%s does not have permission to fail %s",
+                user_name, pcmk__xe_id(xml_rsc));
         fake_op_status(lrm_state, op, PCMK_EXEC_ERROR,
                        PCMK_OCF_INSUFFICIENT_PRIV,
                        "Unprivileged user cannot fail resources");
-        controld_ack_event_directly(from_host, from_sys, NULL, op, ID(xml_rsc));
+        controld_ack_event_directly(from_host, from_sys, NULL, op,
+                                    pcmk__xe_id(xml_rsc));
         lrmd_free_event(op);
         return;
     }
@@ -1204,7 +1209,8 @@ fail_lrm_resource(xmlNode *xml, lrm_state_t *lrm_state, const char *user_name,
                        "Cannot fail unknown resource");
     }
 
-    controld_ack_event_directly(from_host, from_sys, NULL, op, ID(xml_rsc));
+    controld_ack_event_directly(from_host, from_sys, NULL, op,
+                                pcmk__xe_id(xml_rsc));
     lrmd_free_event(op);
 }
 
@@ -1242,16 +1248,17 @@ static bool do_lrm_cancel(ha_msg_input_t *input, lrm_state_t *lrm_state,
     const char *op_task = NULL;
     guint interval_ms = 0;
     gboolean in_progress = FALSE;
-    xmlNode *params = find_xml_node(input->xml, XML_TAG_ATTRS, TRUE);
+    xmlNode *params = pcmk__xe_first_child(input->xml, PCMK__XE_ATTRIBUTES,
+                                           NULL, NULL);
 
     CRM_CHECK(params != NULL, return FALSE);
 
-    meta_key = crm_meta_name(XML_LRM_ATTR_TASK);
+    meta_key = crm_meta_name(PCMK_XA_OPERATION);
     op_task = crm_element_value(params, meta_key);
     free(meta_key);
     CRM_CHECK(op_task != NULL, return FALSE);
 
-    meta_key = crm_meta_name(XML_LRM_ATTR_INTERVAL_MS);
+    meta_key = crm_meta_name(PCMK_META_INTERVAL);
     if (crm_element_value_ms(params, meta_key, &interval_ms) != pcmk_ok) {
         free(meta_key);
         return FALSE;
@@ -1260,7 +1267,7 @@ static bool do_lrm_cancel(ha_msg_input_t *input, lrm_state_t *lrm_state,
 
     op_key = pcmk__op_key(rsc->id, op_task, interval_ms);
 
-    meta_key = crm_meta_name(XML_LRM_ATTR_CALLID);
+    meta_key = crm_meta_name(PCMK__XA_CALL_ID);
     call_id = crm_element_value(params, meta_key);
     free(meta_key);
 
@@ -1302,7 +1309,8 @@ static bool do_lrm_cancel(ha_msg_input_t *input, lrm_state_t *lrm_state,
          * not abcdaa8, they will time out waiting for the ack (no
          * released versions of Pacemaker are affected).
          */
-        const char *peer_version = crm_element_value(params, XML_ATTR_CRM_VERSION);
+        const char *peer_version = crm_element_value(params,
+                                                     PCMK_XA_CRM_FEATURE_SET);
 
         if (compare_version(peer_version, "3.0.8") <= 0) {
             crm_info("Sending compatibility ack for %s cancellation to %s (CRM version %s)",
@@ -1359,9 +1367,8 @@ new_metadata_cb_data(lrmd_rsc_info_t *rsc, xmlNode *input_xml)
 {
     struct metadata_cb_data *data = NULL;
 
-    data = calloc(1, sizeof(struct metadata_cb_data));
-    CRM_ASSERT(data != NULL);
-    data->input_xml = copy_xml(input_xml);
+    data = pcmk__assert_alloc(1, sizeof(struct metadata_cb_data));
+    data->input_xml = pcmk__xml_copy(NULL, input_xml);
     data->rsc = lrmd_copy_rsc_info(rsc);
     return data;
 }
@@ -1433,11 +1440,11 @@ do_lrm_invoke(long long action,
     }
     CRM_ASSERT(lrm_state != NULL);
 
-    user_name = pcmk__update_acl_user(input->msg, F_CRM_USER, NULL);
-    crm_op = crm_element_value(input->msg, F_CRM_TASK);
-    from_sys = crm_element_value(input->msg, F_CRM_SYS_FROM);
+    user_name = pcmk__update_acl_user(input->msg, PCMK__XA_CRM_USER, NULL);
+    crm_op = crm_element_value(input->msg, PCMK__XA_CRM_TASK);
+    from_sys = crm_element_value(input->msg, PCMK__XA_CRM_SYS_FROM);
     if (!pcmk__str_eq(from_sys, CRM_SYSTEM_TENGINE, pcmk__str_none)) {
-        from_host = crm_element_value(input->msg, F_CRM_HOST_FROM);
+        from_host = crm_element_value(input->msg, PCMK__XA_SRC);
     }
 
     if (pcmk__str_eq(crm_op, PCMK_ACTION_LRM_DELETE, pcmk__str_none)) {
@@ -1447,7 +1454,7 @@ do_lrm_invoke(long long action,
         operation = PCMK_ACTION_DELETE;
 
     } else if (input->xml != NULL) {
-        operation = crm_element_value(input->xml, XML_LRM_ATTR_TASK);
+        operation = crm_element_value(input->xml, PCMK_XA_OPERATION);
     }
 
     CRM_CHECK(!pcmk__str_empty(crm_op) || !pcmk__str_empty(operation), return);
@@ -1471,7 +1478,7 @@ do_lrm_invoke(long long action,
 
     // @COMPAT DCs <1.1.14 in a rolling upgrade might schedule this op
     } else if (pcmk__str_eq(operation, CRM_OP_PROBED, pcmk__str_none)) {
-        update_attrd(lrm_state->node_name, CRM_OP_PROBED, XML_BOOLEAN_TRUE,
+        update_attrd(lrm_state->node_name, CRM_OP_PROBED, PCMK_VALUE_TRUE,
                      user_name, is_remote_node);
 
     } else if (pcmk__str_eq(crm_op, CRM_OP_REPROBE, pcmk__str_none)
@@ -1480,20 +1487,21 @@ do_lrm_invoke(long long action,
 
         if (input->xml != NULL) {
             // For CRM_OP_REPROBE, a NULL target means we're targeting all nodes
-            raw_target = crm_element_value(input->xml, XML_LRM_ATTR_TARGET);
+            raw_target = crm_element_value(input->xml, PCMK__META_ON_NODE);
         }
         handle_reprobe_op(lrm_state, from_sys, from_host, user_name,
                           is_remote_node, (raw_target == NULL));
 
     } else if (operation != NULL) {
         lrmd_rsc_info_t *rsc = NULL;
-        xmlNode *xml_rsc = find_xml_node(input->xml, XML_CIB_TAG_RESOURCE, TRUE);
+        xmlNode *xml_rsc = pcmk__xe_first_child(input->xml, PCMK_XE_PRIMITIVE,
+                                                NULL, NULL);
         gboolean create_rsc = !pcmk__str_eq(operation, PCMK_ACTION_DELETE,
                                             pcmk__str_none);
         int rc;
 
         // We can't return anything meaningful without a resource ID
-        CRM_CHECK(xml_rsc && ID(xml_rsc), return);
+        CRM_CHECK((xml_rsc != NULL) && (pcmk__xe_id(xml_rsc) != NULL), return);
 
         rc = get_lrm_resource(lrm_state, xml_rsc, create_rsc, &rsc);
         if (rc == -ENOTCONN) {
@@ -1509,15 +1517,15 @@ do_lrm_invoke(long long action,
              */
             crm_notice("Not registering resource '%s' for a %s event "
                        CRM_XS " get-rc=%d (%s) transition-key=%s",
-                       ID(xml_rsc), operation,
-                       rc, pcmk_strerror(rc), ID(input->xml));
-            delete_rsc_entry(lrm_state, input, ID(xml_rsc), NULL, pcmk_ok,
-                             user_name, true);
+                       pcmk__xe_id(xml_rsc), operation,
+                       rc, pcmk_strerror(rc), pcmk__xe_id(input->xml));
+            delete_rsc_entry(lrm_state, input, pcmk__xe_id(xml_rsc), NULL,
+                             pcmk_ok, user_name, true);
             return;
 
         } else if (rc == -EINVAL) {
             // Resource operation on malformed resource
-            crm_err("Invalid resource definition for %s", ID(xml_rsc));
+            crm_err("Invalid resource definition for %s", pcmk__xe_id(xml_rsc));
             crm_log_xml_warn(input->msg, "invalid resource");
             synthesize_lrmd_failure(lrm_state, input->xml, PCMK_EXEC_ERROR,
                                     PCMK_OCF_NOT_CONFIGURED, // fatal error
@@ -1528,7 +1536,7 @@ do_lrm_invoke(long long action,
             // Error communicating with the executor
             crm_err("Could not register resource '%s' with executor: %s "
                     CRM_XS " rc=%d",
-                    ID(xml_rsc), pcmk_strerror(rc), rc);
+                    pcmk__xe_id(xml_rsc), pcmk_strerror(rc), rc);
             crm_log_xml_warn(input->msg, "failed registration");
             synthesize_lrmd_failure(lrm_state, input->xml, PCMK_EXEC_ERROR,
                                     PCMK_OCF_INVALID_PARAM, // hard error
@@ -1632,30 +1640,30 @@ construct_op(const lrm_state_t *lrm_state, const xmlNode *rsc_op,
          */
         op->params = pcmk__strkey_table(free, free);
 
-        g_hash_table_insert(op->params, strdup(XML_ATTR_CRM_VERSION), strdup(CRM_FEATURE_SET));
+        pcmk__insert_dup(op->params, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET);
 
         crm_trace("Constructed %s op for %s", operation, rsc_id);
         return op;
     }
 
     params = xml2list(rsc_op);
-    g_hash_table_remove(params, CRM_META "_op_target_rc");
+    g_hash_table_remove(params, CRM_META "_" PCMK__META_OP_TARGET_RC);
 
-    op_delay = crm_meta_value(params, XML_OP_ATTR_START_DELAY);
+    op_delay = crm_meta_value(params, PCMK_META_START_DELAY);
     pcmk__scan_min_int(op_delay, &op->start_delay, 0);
 
-    op_timeout = crm_meta_value(params, XML_ATTR_TIMEOUT);
+    op_timeout = crm_meta_value(params, PCMK_META_TIMEOUT);
     pcmk__scan_min_int(op_timeout, &op->timeout, 0);
 
-    if (pcmk__guint_from_hash(params, CRM_META "_" XML_LRM_ATTR_INTERVAL_MS, 0,
+    if (pcmk__guint_from_hash(params, CRM_META "_" PCMK_META_INTERVAL, 0,
                               &(op->interval_ms)) != pcmk_rc_ok) {
         op->interval_ms = 0;
     }
 
     /* Use pcmk_monitor_timeout instead of meta timeout for stonith
        recurring monitor, if set */
-    primitive = find_xml_node(rsc_op, XML_CIB_TAG_RESOURCE, FALSE);
-    class = crm_element_value(primitive, XML_AGENT_ATTR_CLASS);
+    primitive = pcmk__xe_first_child(rsc_op, PCMK_XE_PRIMITIVE, NULL, NULL);
+    class = crm_element_value(primitive, PCMK_XA_CLASS);
 
     if (pcmk_is_set(pcmk_get_ra_caps(class), pcmk_ra_cap_fence_params)
             && pcmk__str_eq(operation, PCMK_ACTION_MONITOR, pcmk__str_casei)
@@ -1663,7 +1671,9 @@ construct_op(const lrm_state_t *lrm_state, const xmlNode *rsc_op,
 
         op_timeout = g_hash_table_lookup(params, "pcmk_monitor_timeout");
         if (op_timeout != NULL) {
-            op->timeout = crm_get_msec(op_timeout);
+            long long timeout_ms = crm_get_msec(op_timeout);
+
+            op->timeout = (int) QB_MIN(timeout_ms, INT_MAX);
         }
     }
 
@@ -1701,10 +1711,10 @@ construct_op(const lrm_state_t *lrm_state, const xmlNode *rsc_op,
         op->start_delay = 0;
     }
 
-    transition = crm_element_value(rsc_op, XML_ATTR_TRANSITION_KEY);
+    transition = crm_element_value(rsc_op, PCMK__XA_TRANSITION_KEY);
     CRM_CHECK(transition != NULL, return op);
 
-    op->user_data = strdup(transition);
+    op->user_data = pcmk__str_copy(transition);
 
     if (op->interval_ms != 0) {
         if (pcmk__strcase_any_of(operation, PCMK_ACTION_START, PCMK_ACTION_STOP,
@@ -1745,23 +1755,25 @@ controld_ack_event_directly(const char *to_host, const char *to_sys,
 
     CRM_CHECK(op != NULL, return);
     if (op->rsc_id == NULL) {
+        // op->rsc_id is a (const char *) but lrmd_free_event() frees it
         CRM_ASSERT(rsc_id != NULL);
-        op->rsc_id = strdup(rsc_id);
+        op->rsc_id = pcmk__str_copy(rsc_id);
     }
     if (to_sys == NULL) {
         to_sys = CRM_SYSTEM_TENGINE;
     }
 
-    peer = crm_get_peer(0, controld_globals.our_nodename);
+    peer = pcmk__get_node(0, controld_globals.our_nodename, NULL,
+                          pcmk__node_search_cluster_member);
     update = create_node_state_update(peer, node_update_none, NULL,
                                       __func__);
 
-    iter = create_xml_node(update, XML_CIB_TAG_LRM);
-    crm_xml_add(iter, XML_ATTR_ID, controld_globals.our_uuid);
-    iter = create_xml_node(iter, XML_LRM_TAG_RESOURCES);
-    iter = create_xml_node(iter, XML_LRM_TAG_RESOURCE);
+    iter = pcmk__xe_create(update, PCMK__XE_LRM);
+    crm_xml_add(iter, PCMK_XA_ID, controld_globals.our_uuid);
+    iter = pcmk__xe_create(iter, PCMK__XE_LRM_RESOURCES);
+    iter = pcmk__xe_create(iter, PCMK__XE_LRM_RESOURCE);
 
-    crm_xml_add(iter, XML_ATTR_ID, op->rsc_id);
+    crm_xml_add(iter, PCMK_XA_ID, op->rsc_id);
 
     controld_add_resource_history_xml(iter, rsc, op,
                                       controld_globals.our_nodename);
@@ -1771,7 +1783,7 @@ controld_ack_event_directly(const char *to_host, const char *to_sys,
 
     crm_debug("ACK'ing resource op " PCMK__OP_FMT " from %s: %s",
               op->rsc_id, op->op_type, op->interval_ms, op->user_data,
-              crm_element_value(reply, XML_ATTR_REFERENCE));
+              crm_element_value(reply, PCMK_XA_REFERENCE));
 
     if (relay_message(reply, TRUE) == FALSE) {
         crm_log_xml_err(reply, "Unable to route reply");
@@ -1916,10 +1928,10 @@ do_lrm_rsc_op(lrm_state_t *lrm_state, lrmd_rsc_info_t *rsc, xmlNode *msg,
 
     CRM_CHECK((rsc != NULL) && (msg != NULL), return);
 
-    operation = crm_element_value(msg, XML_LRM_ATTR_TASK);
+    operation = crm_element_value(msg, PCMK_XA_OPERATION);
     CRM_CHECK(!pcmk__str_empty(operation), return);
 
-    transition = crm_element_value(msg, XML_ATTR_TRANSITION_KEY);
+    transition = crm_element_value(msg, PCMK__XA_TRANSITION_KEY);
     if (pcmk__str_empty(transition)) {
         crm_log_xml_err(msg, "Missing transition number");
     }
@@ -1982,8 +1994,8 @@ do_lrm_rsc_op(lrm_state_t *lrm_state, lrmd_rsc_info_t *rsc, xmlNode *msg,
         crm_notice("Discarding attempt to perform action %s on %s in state %s "
                    "(shutdown=%s)", operation, rsc->id,
                    fsa_state2string(controld_globals.fsa_state),
-                   pcmk__btoa(pcmk_is_set(controld_globals.fsa_input_register,
-                                          R_SHUTDOWN)));
+                   pcmk__flag_text(controld_globals.fsa_input_register,
+                                   R_SHUTDOWN));
 
         lrmd__set_result(op, PCMK_OCF_UNKNOWN_ERROR, PCMK_EXEC_INVALID,
                          nack_reason);
@@ -2013,17 +2025,17 @@ do_lrm_rsc_op(lrm_state_t *lrm_state, lrmd_rsc_info_t *rsc, xmlNode *msg,
         char *call_id_s = make_stop_id(rsc->id, call_id);
         active_op_t *pending = NULL;
 
-        pending = calloc(1, sizeof(active_op_t));
+        pending = pcmk__assert_alloc(1, sizeof(active_op_t));
         crm_trace("Recording pending op: %d - %s %s", call_id, op_id, call_id_s);
 
         pending->call_id = call_id;
         pending->interval_ms = op->interval_ms;
-        pending->op_type = strdup(operation);
-        pending->op_key = strdup(op_id);
-        pending->rsc_id = strdup(rsc->id);
+        pending->op_type = pcmk__str_copy(operation);
+        pending->op_key = pcmk__str_copy(op_id);
+        pending->rsc_id = pcmk__str_copy(rsc->id);
         pending->start_time = time(NULL);
-        pcmk__str_update(&pending->user_data, op->user_data);
-        if (crm_element_value_epoch(msg, XML_CONFIG_ATTR_SHUTDOWN_LOCK,
+        pending->user_data = pcmk__str_copy(op->user_data);
+        if (crm_element_value_epoch(msg, PCMK_OPT_SHUTDOWN_LOCK,
                                     &(pending->lock_time)) != pcmk_ok) {
             pending->lock_time = 0;
         }
@@ -2082,7 +2094,7 @@ unescape_newlines(const char *string)
         return NULL;
     }
 
-    ret = strdup(string);
+    ret = pcmk__str_copy(string);
     pch = strstr(ret, escaped_newline);
     while (pch != NULL) {
         /* Replace newline escape pattern with actual newline (and a space so we
@@ -2249,11 +2261,12 @@ process_lrm_event(lrm_state_t *lrm_state, lrmd_event_data_t *op,
         rsc = lrm_state_get_rsc_info(lrm_state, op->rsc_id, 0);
     }
     if ((rsc == NULL) && action_xml) {
-        xmlNode *xml = find_xml_node(action_xml, XML_CIB_TAG_RESOURCE, TRUE);
+        xmlNode *xml = pcmk__xe_first_child(action_xml, PCMK_XE_PRIMITIVE, NULL,
+                                            NULL);
 
-        const char *standard = crm_element_value(xml, XML_AGENT_ATTR_CLASS);
-        const char *provider = crm_element_value(xml, XML_AGENT_ATTR_PROVIDER);
-        const char *type = crm_element_value(xml, XML_ATTR_TYPE);
+        const char *standard = crm_element_value(xml, PCMK_XA_CLASS);
+        const char *provider = crm_element_value(xml, PCMK_XA_PROVIDER);
+        const char *type = crm_element_value(xml, PCMK_XA_TYPE);
 
         if (standard && type) {
             crm_info("%s agent information not cached, using %s%s%s:%s from action XML",
@@ -2270,7 +2283,7 @@ process_lrm_event(lrm_state_t *lrm_state, lrmd_event_data_t *op,
     if (lrm_state) {
         node_name = lrm_state->node_name;
     } else if (action_xml) {
-        node_name = crm_element_value(action_xml, XML_LRM_ATTR_TARGET);
+        node_name = crm_element_value(action_xml, PCMK__META_ON_NODE);
     }
 
     if(pending == NULL) {
diff --git a/daemons/controld/controld_execd_state.c b/daemons/controld/controld_execd_state.c
index b90cc5e..1919684 100644
--- a/daemons/controld/controld_execd_state.c
+++ b/daemons/controld/controld_execd_state.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the Pacemaker project contributors
+ * Copyright 2012-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -12,8 +12,8 @@
 #include <errno.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/iso8601.h>
+#include <crm/common/xml.h>
 #include <crm/pengine/rules.h>
 #include <crm/pengine/rules_internal.h>
 #include <crm/lrmd_internal.h>
@@ -116,12 +116,9 @@ lrm_state_create(const char *node_name)
         return NULL;
     }
 
-    state = calloc(1, sizeof(lrm_state_t));
-    if (!state) {
-        return NULL;
-    }
+    state = pcmk__assert_alloc(1, sizeof(lrm_state_t));
 
-    state->node_name = strdup(node_name);
+    state->node_name = pcmk__str_copy(node_name);
     state->rsc_info_cache = pcmk__strkey_table(NULL, free_rsc_info);
     state->deletion_ops = pcmk__strkey_table(free, free_deletion_op);
     state->active_ops = pcmk__strkey_table(free, free_recurring_op);
@@ -453,7 +450,7 @@ crmd_proxy_dispatch(const char *session, xmlNode *msg)
 {
     crm_trace("Processing proxied IPC message from session %s", session);
     crm_log_xml_trace(msg, "controller[inbound]");
-    crm_xml_add(msg, F_CRM_SYS_FROM, session);
+    crm_xml_add(msg, PCMK__XA_CRM_SYS_FROM, session);
     if (controld_authorize_ipc_message(msg, NULL, session)) {
         route_message(C_IPC_MESSAGE, msg);
     }
@@ -477,8 +474,9 @@ remote_config_check(xmlNode * msg, int call_id, int rc, xmlNode * output, void *
 
         crm_debug("Call %d : Parsing CIB options", call_id);
 
-        pe_unpack_nvpairs(output, output, XML_CIB_TAG_PROPSET, NULL,
-                          config_hash, CIB_OPTIONS_FIRST, FALSE, now, NULL);
+        pe_unpack_nvpairs(output, output, PCMK_XE_CLUSTER_PROPERTY_SET, NULL,
+                          config_hash, PCMK_VALUE_CIB_BOOTSTRAP_OPTIONS, FALSE,
+                          now, NULL);
 
         /* Now send it to the remote peer */
         lrmd__validate_remote_settings(lrmd, config_hash);
@@ -492,20 +490,22 @@ static void
 crmd_remote_proxy_cb(lrmd_t *lrmd, void *userdata, xmlNode *msg)
 {
     lrm_state_t *lrm_state = userdata;
-    const char *session = crm_element_value(msg, F_LRMD_IPC_SESSION);
+    const char *session = crm_element_value(msg, PCMK__XA_LRMD_IPC_SESSION);
     remote_proxy_t *proxy = g_hash_table_lookup(proxy_table, session);
 
-    const char *op = crm_element_value(msg, F_LRMD_IPC_OP);
+    const char *op = crm_element_value(msg, PCMK__XA_LRMD_IPC_OP);
     if (pcmk__str_eq(op, LRMD_IPC_OP_NEW, pcmk__str_casei)) {
-        const char *channel = crm_element_value(msg, F_LRMD_IPC_IPC_SERVER);
+        const char *channel = crm_element_value(msg, PCMK__XA_LRMD_IPC_SERVER);
 
         proxy = crmd_remote_proxy_new(lrmd, lrm_state->node_name, session, channel);
         if (!remote_ra_controlling_guest(lrm_state)) {
             if (proxy != NULL) {
                 cib_t *cib_conn = controld_globals.cib_conn;
 
-                /* Look up stonith-watchdog-timeout and send to the remote peer for validation */
-                int rc = cib_conn->cmds->query(cib_conn, XML_CIB_TAG_CRMCONFIG,
+                /* Look up PCMK_OPT_STONITH_WATCHDOG_TIMEOUT and send to the
+                 * remote peer for validation
+                 */
+                int rc = cib_conn->cmds->query(cib_conn, PCMK_XE_CRM_CONFIG,
                                                NULL, cib_scope_local);
                 cib_conn->cmds->register_callback_full(cib_conn, rc, 10, FALSE,
                                                        lrmd,
@@ -525,7 +525,8 @@ crmd_remote_proxy_cb(lrmd_t *lrmd, void *userdata, xmlNode *msg)
 
         if (!remote_ra_is_in_maintenance(lrm_state)) {
             now_s = pcmk__ttoa(time(NULL));
-            update_attrd(lrm_state->node_name, XML_CIB_ATTR_SHUTDOWN, now_s, NULL, TRUE);
+            update_attrd(lrm_state->node_name, PCMK__NODE_ATTR_SHUTDOWN, now_s,
+                         NULL, TRUE);
             free(now_s);
 
             remote_proxy_ack_shutdown(lrmd);
@@ -545,39 +546,43 @@ crmd_remote_proxy_cb(lrmd_t *lrmd, void *userdata, xmlNode *msg)
          * to send to ourselves over IPC -- do it directly.
          */
         int flags = 0;
-        xmlNode *request = get_message_xml(msg, F_LRMD_IPC_MSG);
+        xmlNode *wrapper = pcmk__xe_first_child(msg, PCMK__XE_LRMD_IPC_MSG,
+                                                NULL, NULL);
+        xmlNode *request = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
         CRM_CHECK(request != NULL, return);
         CRM_CHECK(lrm_state->node_name, return);
-        crm_xml_add(request, XML_ACL_TAG_ROLE, "pacemaker-remote");
-        pcmk__update_acl_user(request, F_LRMD_IPC_USER, lrm_state->node_name);
+        crm_xml_add(request, PCMK_XE_ACL_ROLE, "pacemaker-remote");
+        pcmk__update_acl_user(request, PCMK__XA_LRMD_IPC_USER,
+                              lrm_state->node_name);
 
         /* Pacemaker Remote nodes don't know their own names (as known to the
          * cluster). When getting a node info request with no name or ID, add
          * the name, so we don't return info for ourselves instead of the
          * Pacemaker Remote node.
          */
-        if (pcmk__str_eq(crm_element_value(request, F_CRM_TASK), CRM_OP_NODE_INFO, pcmk__str_casei)) {
+        if (pcmk__str_eq(crm_element_value(request, PCMK__XA_CRM_TASK),
+                         CRM_OP_NODE_INFO, pcmk__str_none)) {
             int node_id = 0;
 
-            crm_element_value_int(request, XML_ATTR_ID, &node_id);
+            crm_element_value_int(request, PCMK_XA_ID, &node_id);
             if ((node_id <= 0)
-                && (crm_element_value(request, XML_ATTR_UNAME) == NULL)) {
-                crm_xml_add(request, XML_ATTR_UNAME, lrm_state->node_name);
+                && (crm_element_value(request, PCMK_XA_UNAME) == NULL)) {
+                crm_xml_add(request, PCMK_XA_UNAME, lrm_state->node_name);
             }
         }
 
         crmd_proxy_dispatch(session, request);
 
-        crm_element_value_int(msg, F_LRMD_IPC_MSG_FLAGS, &flags);
+        crm_element_value_int(msg, PCMK__XA_LRMD_IPC_MSG_FLAGS, &flags);
         if (flags & crm_ipc_client_response) {
             int msg_id = 0;
-            xmlNode *op_reply = create_xml_node(NULL, "ack");
+            xmlNode *op_reply = pcmk__xe_create(NULL, PCMK__XE_ACK);
 
-            crm_xml_add(op_reply, "function", __func__);
-            crm_xml_add_int(op_reply, "line", __LINE__);
+            crm_xml_add(op_reply, PCMK_XA_FUNCTION, __func__);
+            crm_xml_add_int(op_reply, PCMK__XA_LINE, __LINE__);
 
-            crm_element_value_int(msg, F_LRMD_IPC_MSG_ID, &msg_id);
+            crm_element_value_int(msg, PCMK__XA_LRMD_IPC_MSG_ID, &msg_id);
             remote_proxy_relay_response(proxy, op_reply, msg_id);
 
             free_xml(op_reply);
@@ -650,7 +655,7 @@ lrm_state_get_metadata(lrm_state_t * lrm_state,
      * @TODO Make meta-data calls asynchronous. (This will be part of a larger
      * project to make meta-data calls via the executor rather than directly.)
      */
-    params = lrmd_key_value_add(params, CRM_META "_" XML_LRM_ATTR_TARGET,
+    params = lrmd_key_value_add(params, CRM_META "_" PCMK__META_ON_NODE,
                                 lrm_state->node_name);
 
     return ((lrmd_t *) lrm_state->conn)->cmds->get_metadata_params(lrm_state->conn,
diff --git a/daemons/controld/controld_fencing.c b/daemons/controld/controld_fencing.c
index 9557d9e..dcffc8e 100644
--- a/daemons/controld/controld_fencing.c
+++ b/daemons/controld/controld_fencing.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -9,7 +9,6 @@
 
 #include <crm_internal.h>
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/stonith-ng.h>
 #include <crm/fencing/internal.h>
@@ -63,9 +62,9 @@ set_fence_reaction(const char *reaction_s)
         fence_reaction_panic = true;
 
     } else {
-        if (!pcmk__str_eq(reaction_s, "stop", pcmk__str_casei)) {
+        if (!pcmk__str_eq(reaction_s, PCMK_VALUE_STOP, pcmk__str_casei)) {
             crm_warn("Invalid value '%s' for %s, using 'stop'",
-                     reaction_s, XML_CONFIG_ATTR_FENCE_REACTION);
+                     reaction_s, PCMK_OPT_FENCE_REACTION);
         }
         fence_reaction_panic = false;
     }
@@ -82,10 +81,10 @@ controld_configure_fencing(GHashTable *options)
 {
     const char *value = NULL;
 
-    value = g_hash_table_lookup(options, XML_CONFIG_ATTR_FENCE_REACTION);
+    value = g_hash_table_lookup(options, PCMK_OPT_FENCE_REACTION);
     set_fence_reaction(value);
 
-    value = g_hash_table_lookup(options, "stonith-max-attempts");
+    value = g_hash_table_lookup(options, PCMK_OPT_STONITH_MAX_ATTEMPTS);
     update_stonith_max_attempts(value);
 }
 
@@ -176,7 +175,7 @@ st_fail_count_increment(const char *target)
         }
 
         rec->count = 1;
-        g_hash_table_insert(stonith_failures, strdup(target), rec);
+        g_hash_table_insert(stonith_failures, pcmk__str_copy(target), rec);
     }
 }
 
@@ -191,8 +190,8 @@ cib_fencing_updated(xmlNode *msg, int call_id, int rc, xmlNode *output,
         crm_err("Fencing update %d for %s: failed - %s (%d)",
                 call_id, (char *)user_data, pcmk_strerror(rc), rc);
         crm_log_xml_warn(msg, "Failed update");
-        abort_transition(INFINITY, pcmk__graph_shutdown, "CIB update failed",
-                         NULL);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_shutdown,
+                         "CIB update failed", NULL);
 
     } else {
         crm_info("Fencing update %d for %s: complete", call_id, (char *)user_data);
@@ -222,7 +221,7 @@ send_stonith_update(pcmk__graph_action_t *action, const char *target,
      * Try getting any existing node cache entry also by node uuid in case it
      * doesn't have an uname yet.
      */
-    peer = pcmk__get_peer_full(0, target, uuid, CRM_GET_PEER_ANY);
+    peer = pcmk__get_node(0, target, uuid, pcmk__node_search_any);
 
     CRM_CHECK(peer != NULL, return);
 
@@ -236,7 +235,7 @@ send_stonith_update(pcmk__graph_action_t *action, const char *target,
 
     if (peer->uuid == NULL) {
         crm_info("Recording uuid '%s' for node '%s'", uuid, target);
-        peer->uuid = strdup(uuid);
+        peer->uuid = pcmk__str_copy(uuid);
     }
 
     crmd_peer_down(peer, TRUE);
@@ -248,21 +247,21 @@ send_stonith_update(pcmk__graph_action_t *action, const char *target,
     if (peer->flags & crm_remote_node) {
         char *now_s = pcmk__ttoa(time(NULL));
 
-        crm_xml_add(node_state, XML_NODE_IS_FENCED, now_s);
+        crm_xml_add(node_state, PCMK__XA_NODE_FENCED, now_s);
         free(now_s);
     }
 
     /* Force our known ID */
-    crm_xml_add(node_state, XML_ATTR_ID, uuid);
+    crm_xml_add(node_state, PCMK_XA_ID, uuid);
 
     rc = controld_globals.cib_conn->cmds->modify(controld_globals.cib_conn,
-                                                 XML_CIB_TAG_STATUS, node_state,
+                                                 PCMK_XE_STATUS, node_state,
                                                  cib_scope_local
                                                  |cib_can_create);
 
     /* Delay processing the trigger until the update completes */
     crm_debug("Sending fencing update %d for %s", rc, target);
-    fsa_register_cib_callback(rc, strdup(target), cib_fencing_updated);
+    fsa_register_cib_callback(rc, pcmk__str_copy(target), cib_fencing_updated);
 
     // Make sure it sticks
     /* controld_globals.cib_conn->cmds->bump_epoch(controld_globals.cib_conn,
@@ -293,7 +292,8 @@ abort_for_stonith_failure(enum pcmk__graph_next abort_action,
     if ((abort_action != pcmk__graph_wait) && too_many_st_failures(target)) {
         abort_action = pcmk__graph_wait;
     }
-    abort_transition(INFINITY, abort_action, "Stonith failed", reason);
+    abort_transition(PCMK_SCORE_INFINITY, abort_action, "Stonith failed",
+                     reason);
 }
 
 
@@ -315,7 +315,8 @@ static GList *stonith_cleanup_list = NULL;
  */
 void
 add_stonith_cleanup(const char *target) {
-    stonith_cleanup_list = g_list_append(stonith_cleanup_list, strdup(target));
+    stonith_cleanup_list = g_list_append(stonith_cleanup_list,
+                                         pcmk__str_copy(target));
 }
 
 /*!
@@ -374,8 +375,9 @@ execute_stonith_cleanup(void)
 
     for (iter = stonith_cleanup_list; iter != NULL; iter = iter->next) {
         char *target = iter->data;
-        crm_node_t *target_node = crm_get_peer(0, target);
-        const char *uuid = crm_peer_uuid(target_node);
+        crm_node_t *target_node =
+            pcmk__get_node(0, target, NULL, pcmk__node_search_cluster_member);
+        const char *uuid = pcmk__cluster_node_uuid(target_node);
 
         crm_notice("Marking %s, target of a previous stonith action, as clean", target);
         send_stonith_update(NULL, target, uuid);
@@ -424,13 +426,13 @@ fail_incompletable_stonith(pcmk__graph_t *graph)
                 continue;
             }
 
-            task = crm_element_value(action->xml, XML_LRM_ATTR_TASK);
+            task = crm_element_value(action->xml, PCMK_XA_OPERATION);
             if (pcmk__str_eq(task, PCMK_ACTION_STONITH, pcmk__str_casei)) {
                 pcmk__set_graph_action_flags(action, pcmk__graph_action_failed);
                 last_action = action->xml;
                 pcmk__update_graph(graph, action);
                 crm_notice("Failing action %d (%s): fencer terminated",
-                           action->id, ID(action->xml));
+                           action->id, pcmk__xe_id(action->xml));
             }
         }
     }
@@ -580,15 +582,17 @@ handle_fence_notification(stonith_t *st, stonith_event_t *event)
                event->id);
 
     if (succeeded) {
-        crm_node_t *peer = pcmk__search_known_node_cache(0, event->target,
-                                                         CRM_GET_PEER_ANY);
+        const uint32_t flags = pcmk__node_search_any
+                               |pcmk__node_search_cluster_cib;
+
+        crm_node_t *peer = pcmk__search_node_caches(0, event->target, flags);
         const char *uuid = NULL;
 
         if (peer == NULL) {
             return;
         }
 
-        uuid = crm_peer_uuid(peer);
+        uuid = pcmk__cluster_node_uuid(peer);
 
         if (AM_I_DC) {
             /* The DC always sends updates */
@@ -598,8 +602,8 @@ handle_fence_notification(stonith_t *st, stonith_event_t *event)
              * hosted any guest nodes, and call remote_node_down() for them.
              * Unfortunately, the controller doesn't have a simple, reliable way
              * to map hosts to guests. It might be possible to track this in the
-             * peer cache via crm_remote_peer_cache_refresh(). For now, we rely
-             * on the scheduler creating fence pseudo-events for the guests.
+             * peer cache via refresh_remote_nodes(). For now, we rely on the
+             * scheduler creating fence pseudo-events for the guests.
              */
 
             if (!pcmk__str_eq(client, te_client_id, pcmk__str_casei)) {
@@ -608,7 +612,7 @@ handle_fence_notification(stonith_t *st, stonith_event_t *event)
                  */
                 crm_info("External fencing operation from %s fenced %s",
                          client, event->target);
-                abort_transition(INFINITY, pcmk__graph_restart,
+                abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                                  "External Fencing Operation", NULL);
             }
 
@@ -713,15 +717,16 @@ controld_timer_fencer_connect(gpointer user_data)
     }
 
     if (rc == pcmk_ok) {
-        stonith_api->cmds->register_notification(stonith_api,
-                                                 T_STONITH_NOTIFY_DISCONNECT,
-                                                 tengine_stonith_connection_destroy);
-        stonith_api->cmds->register_notification(stonith_api,
-                                                 T_STONITH_NOTIFY_FENCE,
-                                                 handle_fence_notification);
-        stonith_api->cmds->register_notification(stonith_api,
-                                                 T_STONITH_NOTIFY_HISTORY_SYNCED,
-                                                 tengine_stonith_history_synced);
+        stonith_api_operations_t *cmds = stonith_api->cmds;
+
+        cmds->register_notification(stonith_api,
+                                    PCMK__VALUE_ST_NOTIFY_DISCONNECT,
+                                    tengine_stonith_connection_destroy);
+        cmds->register_notification(stonith_api, PCMK__VALUE_ST_NOTIFY_FENCE,
+                                    handle_fence_notification);
+        cmds->register_notification(stonith_api,
+                                    PCMK__VALUE_ST_NOTIFY_HISTORY_SYNCED,
+                                    tengine_stonith_history_synced);
         te_trigger_stonith_history_sync(TRUE);
         crm_notice("Fencer successfully connected");
     }
@@ -829,7 +834,7 @@ tengine_stonith_callback(stonith_t *stonith, stonith_callback_data_t *data)
         goto bail;
     }
 
-    target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
+    target = crm_element_value(action->xml, PCMK__META_ON_NODE);
     if (target == NULL) {
         crm_err("Ignoring fence operation %d result: No target given (bug?)",
                 data->call_id);
@@ -838,8 +843,10 @@ tengine_stonith_callback(stonith_t *stonith, stonith_callback_data_t *data)
 
     stop_te_timer(action);
     if (stonith__exit_status(data) == CRM_EX_OK) {
-        const char *uuid = crm_element_value(action->xml, XML_LRM_ATTR_TARGET_UUID);
-        const char *op = crm_meta_value(action->params, "stonith_action");
+        const char *uuid = crm_element_value(action->xml,
+                                             PCMK__META_ON_NODE_UUID);
+        const char *op = crm_meta_value(action->params,
+                                        PCMK__META_STONITH_ACTION);
 
         crm_info("Fence operation %d for %s succeeded", data->call_id, target);
         if (!(pcmk_is_set(action->flags, pcmk__graph_action_confirmed))) {
@@ -864,11 +871,12 @@ tengine_stonith_callback(stonith_t *stonith, stonith_callback_data_t *data)
                              is_remote_node);
                 free(now);
 
-                value = crm_meta_value(action->params, XML_OP_ATTR_DIGESTS_ALL);
+                value = crm_meta_value(action->params, PCMK__META_DIGESTS_ALL);
                 update_attrd(target, CRM_ATTR_DIGESTS_ALL, value, NULL,
                              is_remote_node);
 
-                value = crm_meta_value(action->params, XML_OP_ATTR_DIGESTS_SECURE);
+                value = crm_meta_value(action->params,
+                                       PCMK__META_DIGESTS_SECURE);
                 update_attrd(target, CRM_ATTR_DIGESTS_SECURE, value, NULL,
                              is_remote_node);
 
@@ -952,10 +960,11 @@ controld_execute_fence_action(pcmk__graph_t *graph,
                               pcmk__graph_action_t *action)
 {
     int rc = 0;
-    const char *id = ID(action->xml);
-    const char *uuid = crm_element_value(action->xml, XML_LRM_ATTR_TARGET_UUID);
-    const char *target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
-    const char *type = crm_meta_value(action->params, "stonith_action");
+    const char *id = pcmk__xe_id(action->xml);
+    const char *uuid = crm_element_value(action->xml, PCMK__META_ON_NODE_UUID);
+    const char *target = crm_element_value(action->xml, PCMK__META_ON_NODE);
+    const char *type = crm_meta_value(action->params,
+                                      PCMK__META_STONITH_ACTION);
     char *transition_key = NULL;
     const char *priority_delay = NULL;
     int delay_i = 0;
@@ -973,7 +982,8 @@ controld_execute_fence_action(pcmk__graph_t *graph,
         return EPROTO;
     }
 
-    priority_delay = crm_meta_value(action->params, XML_CONFIG_ATTR_PRIORITY_FENCING_DELAY);
+    priority_delay = crm_meta_value(action->params,
+                                    PCMK_OPT_PRIORITY_FENCING_DELAY);
 
     crm_notice("Requesting fencing (%s) targeting node %s "
                CRM_XS " action=%s timeout=%i%s%s",
@@ -1001,17 +1011,16 @@ controld_execute_fence_action(pcmk__graph_t *graph,
 bool
 controld_verify_stonith_watchdog_timeout(const char *value)
 {
-    long st_timeout = value? crm_get_msec(value) : 0;
+    long long st_timeout = (value != NULL)? crm_get_msec(value) : 0;
     const char *our_nodename = controld_globals.our_nodename;
-    gboolean rv = TRUE;
 
     if (st_timeout == 0
         || (stonith_api && (stonith_api->state != stonith_disconnected) &&
             stonith__watchdog_fencing_enabled_for_node_api(stonith_api,
                                                            our_nodename))) {
-        rv = pcmk__valid_sbd_timeout(value);
+        return pcmk__valid_stonith_watchdog_timeout(value);
     }
-    return rv;
+    return true;
 }
 
 /* end stonith API client functions */
@@ -1042,7 +1051,7 @@ te_cleanup_stonith_history_sync(stonith_t *st, bool free_timers)
     }
 
     if (st) {
-        st->cmds->remove_notification(st, T_STONITH_NOTIFY_HISTORY_SYNCED);
+        st->cmds->remove_notification(st, PCMK__VALUE_ST_NOTIFY_HISTORY_SYNCED);
     }
 }
 
diff --git a/daemons/controld/controld_fsa.c b/daemons/controld/controld_fsa.c
index 06559b8..79b3507 100644
--- a/daemons/controld/controld_fsa.c
+++ b/daemons/controld/controld_fsa.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2022 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -18,7 +18,6 @@
 #include <crm/crm.h>
 #include <crm/lrmd.h>
 #include <crm/cib.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/cluster/election_internal.h>
 #include <crm/cluster.h>
@@ -198,7 +197,7 @@ s_crmd_fsa(enum crmd_fsa_cause cause)
     if ((controld_globals.fsa_message_queue == NULL)
         && (controld_globals.fsa_actions != A_NOTHING)) {
         /* fake the first message so we can get into the loop */
-        fsa_data = calloc(1, sizeof(fsa_data_t));
+        fsa_data = pcmk__assert_alloc(1, sizeof(fsa_data_t));
         fsa_data->fsa_input = I_NULL;
         fsa_data->fsa_cause = C_FSA_INTERNAL;
         fsa_data->origin = __func__;
@@ -283,8 +282,8 @@ s_crmd_fsa(enum crmd_fsa_cause cause)
         crm_debug("Exiting the FSA: queue=%d, fsa_actions=%#llx, stalled=%s",
                   g_list_length(controld_globals.fsa_message_queue),
                   (unsigned long long) controld_globals.fsa_actions,
-                  pcmk__btoa(pcmk_is_set(controld_globals.flags,
-                                         controld_fsa_is_stalled)));
+                  pcmk__flag_text(controld_globals.flags,
+                                  controld_fsa_is_stalled));
     } else {
         crm_trace("Exiting the FSA");
     }
@@ -549,7 +548,7 @@ check_join_counts(fsa_data_t *msg_data)
         return;
     }
 
-    npeers = crm_active_peers();
+    npeers = pcmk__cluster_num_active_nodes();
     count = crmd_join_phase_count(crm_join_confirmed);
     if (count == npeers) {
         if (npeers == 1) {
diff --git a/daemons/controld/controld_fsa.h b/daemons/controld/controld_fsa.h
index 2b79f07..ad1c4fa 100644
--- a/daemons/controld/controld_fsa.h
+++ b/daemons/controld/controld_fsa.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -401,7 +401,9 @@ enum crmd_fsa_input {
 #  define R_HAVE_CIB        0x00020000ULL   /* Do we have an up-to-date CIB */
 
 #  define R_MEMBERSHIP      0x00100000ULL   /* Have we got cluster layer data yet */
-#  define R_PEER_DATA       0x00200000ULL   /* Have we got T_CL_STATUS data yet */
+
+// Ever received membership-layer data
+#  define R_PEER_DATA       0x00200000ULL
 
 #  define R_HA_DISCONNECTED 0x00400000ULL      /* did we sign out of our own accord */
 
diff --git a/daemons/controld/controld_join_client.c b/daemons/controld/controld_join_client.c
index 805ecbd..8faf58b 100644
--- a/daemons/controld/controld_join_client.c
+++ b/daemons/controld/controld_join_client.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -11,7 +11,6 @@
 
 #include <crm/crm.h>
 #include <crm/cib.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 
 #include <pacemaker-controld.h>
@@ -34,8 +33,9 @@ static void
 update_dc_expected(const xmlNode *msg)
 {
     if ((controld_globals.dc_name != NULL)
-        && pcmk__xe_attr_is_true(msg, F_CRM_DC_LEAVING)) {
-        crm_node_t *dc_node = crm_get_peer(0, controld_globals.dc_name);
+        && pcmk__xe_attr_is_true(msg, PCMK__XA_DC_LEAVING)) {
+        crm_node_t *dc_node = pcmk__get_node(0, controld_globals.dc_name, NULL,
+                                             pcmk__node_search_cluster_member);
 
         pcmk__update_peer_expected(__func__, dc_node, CRMD_JOINSTATE_DOWN);
     }
@@ -55,7 +55,7 @@ do_cl_join_query(long long action,
     sleep(1);                   // Give the cluster layer time to propagate to the DC
     update_dc(NULL);            /* Unset any existing value so that the result is not discarded */
     crm_debug("Querying for a DC");
-    send_cluster_message(NULL, crm_msg_crmd, req, FALSE);
+    pcmk__cluster_send_message(NULL, crm_msg_crmd, req);
     free_xml(req);
 }
 
@@ -84,7 +84,7 @@ do_cl_join_announce(long long action,
 
         crm_debug("Announcing availability");
         update_dc(NULL);
-        send_cluster_message(NULL, crm_msg_crmd, req, FALSE);
+        pcmk__cluster_send_message(NULL, crm_msg_crmd, req);
         free_xml(req);
 
     } else {
@@ -112,10 +112,10 @@ do_cl_join_offer_respond(long long action,
 
     CRM_CHECK(input != NULL, return);
 
-    welcome_from = crm_element_value(input->msg, F_CRM_HOST_FROM);
-    join_id = crm_element_value(input->msg, F_CRM_JOIN_ID);
+    welcome_from = crm_element_value(input->msg, PCMK__XA_SRC);
+    join_id = crm_element_value(input->msg, PCMK__XA_JOIN_ID);
     crm_trace("Accepting cluster join offer from node %s "CRM_XS" join-%s",
-              welcome_from, crm_element_value(input->msg, F_CRM_JOIN_ID));
+              welcome_from, crm_element_value(input->msg, PCMK__XA_JOIN_ID));
 
     /* we only ever want the last one */
     if (query_call_id > 0) {
@@ -134,7 +134,7 @@ do_cl_join_offer_respond(long long action,
 
     query_call_id = cib_conn->cmds->query(cib_conn, NULL, NULL,
                                           cib_scope_local|cib_no_children);
-    fsa_register_cib_callback(query_call_id, strdup(join_id),
+    fsa_register_cib_callback(query_call_id, pcmk__str_copy(join_id),
                               join_query_callback);
     crm_trace("Registered join query callback: %d", query_call_id);
 
@@ -146,7 +146,7 @@ void
 join_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
 {
     char *join_id = user_data;
-    xmlNode *generation = create_xml_node(NULL, XML_CIB_TAG_GENERATION_TUPPLE);
+    xmlNode *generation = pcmk__xe_create(NULL, PCMK__XE_GENERATION_TUPLE);
 
     CRM_LOG_ASSERT(join_id != NULL);
 
@@ -166,19 +166,21 @@ join_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *
 
     } else {
         xmlNode *reply = NULL;
+        const crm_node_t *dc_node =
+            pcmk__get_node(0, controld_globals.dc_name, NULL,
+                           pcmk__node_search_cluster_member);
 
         crm_debug("Respond to join offer join-%s from %s",
                   join_id, controld_globals.dc_name);
-        copy_in_properties(generation, output);
+        pcmk__xe_copy_attrs(generation, output, pcmk__xaf_none);
 
         reply = create_request(CRM_OP_JOIN_REQUEST, generation,
                                controld_globals.dc_name, CRM_SYSTEM_DC,
                                CRM_SYSTEM_CRMD, NULL);
 
-        crm_xml_add(reply, F_CRM_JOIN_ID, join_id);
-        crm_xml_add(reply, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET);
-        send_cluster_message(crm_get_peer(0, controld_globals.dc_name),
-                             crm_msg_crmd, reply, TRUE);
+        crm_xml_add(reply, PCMK__XA_JOIN_ID, join_id);
+        crm_xml_add(reply, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET);
+        pcmk__cluster_send_message(dc_node, crm_msg_crmd, reply);
         free_xml(reply);
     }
 
@@ -190,29 +192,32 @@ void
 set_join_state(const char *start_state, const char *node_name, const char *node_uuid,
                bool remote)
 {
-    if (pcmk__str_eq(start_state, "standby", pcmk__str_casei)) {
+    if (pcmk__str_eq(start_state, PCMK_VALUE_STANDBY, pcmk__str_casei)) {
         crm_notice("Forcing node %s to join in %s state per configured "
                    "environment", node_name, start_state);
         cib__update_node_attr(controld_globals.logger_out,
                               controld_globals.cib_conn, cib_sync_call,
-                              XML_CIB_TAG_NODES, node_uuid,
-                              NULL, NULL, NULL, "standby", "on", NULL,
-                              remote ? "remote" : NULL);
+                              PCMK_XE_NODES, node_uuid,
+                              NULL, NULL, NULL, PCMK_NODE_ATTR_STANDBY,
+                              PCMK_VALUE_TRUE, NULL,
+                              (remote? PCMK_VALUE_REMOTE : NULL));
 
-    } else if (pcmk__str_eq(start_state, "online", pcmk__str_casei)) {
+    } else if (pcmk__str_eq(start_state, PCMK_VALUE_ONLINE, pcmk__str_casei)) {
         crm_notice("Forcing node %s to join in %s state per configured "
                    "environment", node_name, start_state);
         cib__update_node_attr(controld_globals.logger_out,
                               controld_globals.cib_conn, cib_sync_call,
-                              XML_CIB_TAG_NODES, node_uuid,
-                              NULL, NULL, NULL, "standby", "off", NULL,
-                              remote ? "remote" : NULL);
+                              PCMK_XE_NODES, node_uuid,
+                              NULL, NULL, NULL, PCMK_NODE_ATTR_STANDBY,
+                              PCMK_VALUE_FALSE, NULL,
+                              (remote? PCMK_VALUE_REMOTE : NULL));
 
-    } else if (pcmk__str_eq(start_state, "default", pcmk__str_casei)) {
+    } else if (pcmk__str_eq(start_state, PCMK_VALUE_DEFAULT, pcmk__str_casei)) {
         crm_debug("Not forcing a starting state on node %s", node_name);
 
     } else {
-        crm_warn("Unrecognized start state '%s', using 'default' (%s)",
+        crm_warn("Unrecognized start state '%s', using "
+                 "'" PCMK_VALUE_DEFAULT "' (%s)",
                  start_state, node_name);
     }
 }
@@ -220,11 +225,11 @@ set_join_state(const char *start_state, const char *node_name, const char *node_
 static int
 update_conn_host_cache(xmlNode *node, void *userdata)
 {
-    const char *remote = crm_element_value(node, XML_ATTR_ID);
-    const char *conn_host = crm_element_value(node, PCMK__XA_CONN_HOST);
-    const char *state = crm_element_value(node, XML_CIB_TAG_STATE);
+    const char *remote = crm_element_value(node, PCMK_XA_ID);
+    const char *conn_host = crm_element_value(node, PCMK__XA_CONNECTION_HOST);
+    const char *state = crm_element_value(node, PCMK__XA_NODE_STATE);
 
-    crm_node_t *remote_peer = crm_remote_peer_get(remote);
+    crm_node_t *remote_peer = pcmk__cluster_lookup_remote_node(remote);
 
     if (remote_peer == NULL) {
         return pcmk_rc_ok;
@@ -256,8 +261,8 @@ do_cl_join_finalize_respond(long long action,
     const char *start_state = pcmk__env_option(PCMK__ENV_NODE_START_STATE);
 
     int join_id = -1;
-    const char *op = crm_element_value(input->msg, F_CRM_TASK);
-    const char *welcome_from = crm_element_value(input->msg, F_CRM_HOST_FROM);
+    const char *op = crm_element_value(input->msg, PCMK__XA_CRM_TASK);
+    const char *welcome_from = crm_element_value(input->msg, PCMK__XA_SRC);
 
     if (!pcmk__str_eq(op, CRM_OP_JOIN_ACKNAK, pcmk__str_casei)) {
         crm_trace("Ignoring op=%s message", op);
@@ -269,7 +274,7 @@ do_cl_join_finalize_respond(long long action,
         was_nack = FALSE;
     }
 
-    crm_element_value_int(input->msg, F_CRM_JOIN_ID, &join_id);
+    crm_element_value_int(input->msg, PCMK__XA_JOIN_ID, &join_id);
 
     if (was_nack) {
         crm_err("Shutting down because cluster join with leader %s failed "
@@ -305,8 +310,11 @@ do_cl_join_finalize_respond(long long action,
         xmlNode *reply = create_request(CRM_OP_JOIN_CONFIRM, tmp1,
                                         controld_globals.dc_name, CRM_SYSTEM_DC,
                                         CRM_SYSTEM_CRMD, NULL);
+        const crm_node_t *dc_node =
+            pcmk__get_node(0, controld_globals.dc_name, NULL,
+                           pcmk__node_search_cluster_member);
 
-        crm_xml_add_int(reply, F_CRM_JOIN_ID, join_id);
+        crm_xml_add_int(reply, PCMK__XA_JOIN_ID, join_id);
 
         crm_debug("Confirming join-%d: sending local operation history to %s",
                   join_id, controld_globals.dc_name);
@@ -333,8 +341,7 @@ do_cl_join_finalize_respond(long long action,
             }
         }
 
-        send_cluster_message(crm_get_peer(0, controld_globals.dc_name),
-                             crm_msg_crmd, reply, TRUE);
+        pcmk__cluster_send_message(dc_node, crm_msg_crmd, reply);
         free_xml(reply);
 
         if (AM_I_DC == FALSE) {
@@ -347,9 +354,10 @@ do_cl_join_finalize_respond(long long action,
         /* Update the remote node cache with information about which node
          * is hosting the connection.
          */
-        remotes = pcmk__xe_match(input->msg, XML_CIB_TAG_NODES, NULL, NULL);
+        remotes = pcmk__xe_first_child(input->msg, PCMK_XE_NODES, NULL, NULL);
         if (remotes != NULL) {
-            pcmk__xe_foreach_child(remotes, XML_CIB_TAG_NODE, update_conn_host_cache, NULL);
+            pcmk__xe_foreach_child(remotes, PCMK_XE_NODE,
+                                   update_conn_host_cache, NULL);
         }
 
     } else {
diff --git a/daemons/controld/controld_join_dc.c b/daemons/controld/controld_join_dc.c
index 2fe6710..e943e65 100644
--- a/daemons/controld/controld_join_dc.c
+++ b/daemons/controld/controld_join_dc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -11,7 +11,6 @@
 
 #include <crm/crm.h>
 
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/cluster.h>
 
@@ -188,12 +187,12 @@ create_dc_message(const char *join_op, const char *host_to)
                                   CRM_SYSTEM_DC, NULL);
 
     /* Identify which election this is a part of */
-    crm_xml_add_int(msg, F_CRM_JOIN_ID, current_join_id);
+    crm_xml_add_int(msg, PCMK__XA_JOIN_ID, current_join_id);
 
     /* Add a field specifying whether the DC is shutting down. This keeps the
      * joining node from fencing the old DC if it becomes the new DC.
      */
-    pcmk__xe_set_bool_attr(msg, F_CRM_DC_LEAVING,
+    pcmk__xe_set_bool_attr(msg, PCMK__XA_DC_LEAVING,
                            pcmk_is_set(controld_globals.fsa_input_register,
                                        R_SHUTDOWN));
     return msg;
@@ -206,7 +205,7 @@ join_make_offer(gpointer key, gpointer value, gpointer user_data)
     crm_node_t *member = (crm_node_t *)value;
 
     CRM_ASSERT(member != NULL);
-    if (crm_is_peer_active(member) == FALSE) {
+    if (!pcmk__cluster_is_node_active(member)) {
         crm_info("Not making join-%d offer to inactive node %s",
                  current_join_id,
                  (member->uname? member->uname : "with unknown name"));
@@ -249,10 +248,10 @@ join_make_offer(gpointer key, gpointer value, gpointer user_data)
     offer = create_dc_message(CRM_OP_JOIN_OFFER, member->uname);
 
     // Advertise our feature set so the joining node can bail if not compatible
-    crm_xml_add(offer, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET);
+    crm_xml_add(offer, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET);
 
     crm_info("Sending join-%d offer to %s", current_join_id, member->uname);
-    send_cluster_message(member, crm_msg_crmd, offer, TRUE);
+    pcmk__cluster_send_message(member, crm_msg_crmd, offer);
     free_xml(offer);
 
     crm_update_peer_join(__func__, member, crm_join_welcomed);
@@ -313,12 +312,12 @@ do_dc_join_offer_one(long long action,
         return;
     }
 
-    join_to = crm_element_value(welcome->msg, F_CRM_HOST_FROM);
+    join_to = crm_element_value(welcome->msg, PCMK__XA_SRC);
     if (join_to == NULL) {
         crm_err("Can't make join-%d offer to unknown node", current_join_id);
         return;
     }
-    member = crm_get_peer(0, join_to);
+    member = pcmk__get_node(0, join_to, NULL, pcmk__node_search_cluster_member);
 
     /* It is possible that a node will have been sick or starting up when the
      * original offer was made. However, it will either re-announce itself in
@@ -332,14 +331,16 @@ do_dc_join_offer_one(long long action,
      * well, to ensure the correct value for max_generation_from.
      */
     if (strcasecmp(join_to, controld_globals.our_nodename) != 0) {
-        member = crm_get_peer(0, controld_globals.our_nodename);
+        member = pcmk__get_node(0, controld_globals.our_nodename, NULL,
+                                pcmk__node_search_cluster_member);
         join_make_offer(NULL, member, NULL);
     }
 
     /* This was a genuine join request; cancel any existing transition and
      * invoke the scheduler.
      */
-    abort_transition(INFINITY, pcmk__graph_restart, "Node join", NULL);
+    abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart, "Node join",
+                     NULL);
 
     count = crmd_join_phase_count(crm_join_welcomed);
     crm_info("Waiting on join-%d requests from %d outstanding node%s",
@@ -386,19 +387,20 @@ do_dc_join_filter_offer(long long action,
     gboolean ack_nack_bool = TRUE;
     ha_msg_input_t *join_ack = fsa_typed_data(fsa_dt_ha_msg);
 
-    const char *join_from = crm_element_value(join_ack->msg, F_CRM_HOST_FROM);
-    const char *ref = crm_element_value(join_ack->msg, F_CRM_REFERENCE);
+    const char *join_from = crm_element_value(join_ack->msg, PCMK__XA_SRC);
+    const char *ref = crm_element_value(join_ack->msg, PCMK_XA_REFERENCE);
     const char *join_version = crm_element_value(join_ack->msg,
-                                                 XML_ATTR_CRM_VERSION);
+                                                 PCMK_XA_CRM_FEATURE_SET);
     crm_node_t *join_node = NULL;
 
     if (join_from == NULL) {
         crm_err("Ignoring invalid join request without node name");
         return;
     }
-    join_node = crm_get_peer(0, join_from);
+    join_node = pcmk__get_node(0, join_from, NULL,
+                               pcmk__node_search_cluster_member);
 
-    crm_element_value_int(join_ack->msg, F_CRM_JOIN_ID, &join_id);
+    crm_element_value_int(join_ack->msg, PCMK__XA_JOIN_ID, &join_id);
     if (join_id != current_join_id) {
         crm_debug("Ignoring join-%d request from %s because we are on join-%d",
                   join_id, join_from, current_join_id);
@@ -411,13 +413,22 @@ do_dc_join_filter_offer(long long action,
         int lpc = 0;
 
         const char *attributes[] = {
-            XML_ATTR_GENERATION_ADMIN,
-            XML_ATTR_GENERATION,
-            XML_ATTR_NUMUPDATES,
+            PCMK_XA_ADMIN_EPOCH,
+            PCMK_XA_EPOCH,
+            PCMK_XA_NUM_UPDATES,
         };
 
-        for (lpc = 0; cmp == 0 && lpc < PCMK__NELEM(attributes); lpc++) {
-            cmp = compare_int_fields(max_generation_xml, generation, attributes[lpc]);
+        /* It's not obvious that join_ack->xml is the PCMK__XE_GENERATION_TUPLE
+         * element from the join client. The "if" guard is for clarity.
+         */
+        if (pcmk__xe_is(generation, PCMK__XE_GENERATION_TUPLE)) {
+            for (lpc = 0; cmp == 0 && lpc < PCMK__NELEM(attributes); lpc++) {
+                cmp = compare_int_fields(max_generation_xml, generation,
+                                         attributes[lpc]);
+            }
+
+        } else {    // Should always be PCMK__XE_GENERATION_TUPLE
+            CRM_LOG_ASSERT(false);
         }
     }
 
@@ -431,7 +442,7 @@ do_dc_join_filter_offer(long long action,
                 join_id, join_from, value, ref);
         ack_nack_bool = FALSE;
 
-    } else if (!crm_is_peer_active(join_node)) {
+    } else if (!pcmk__cluster_is_node_active(join_node)) {
         if (match_down_event(join_from) != NULL) {
             /* The join request was received after the node was fenced or
              * otherwise shutdown in a way that we're aware of. No need to log
@@ -463,20 +474,20 @@ do_dc_join_filter_offer(long long action,
 
     } else if (max_generation_xml == NULL) {
         const char *validation = crm_element_value(generation,
-                                                   XML_ATTR_VALIDATION);
+                                                   PCMK_XA_VALIDATE_WITH);
 
-        if (get_schema_version(validation) < 0) {
+        if (pcmk__get_schema(validation) == NULL) {
             crm_err("Rejecting join-%d request from %s (with first CIB "
                     "generation) due to unknown schema version %s "
                     CRM_XS " ref=%s",
-                    join_id, join_from, validation, ref);
+                    join_id, join_from, pcmk__s(validation, "(missing)"), ref);
             ack_nack_bool = FALSE;
 
         } else {
             crm_debug("Accepting join-%d request from %s (with first CIB "
                       "generation) " CRM_XS " ref=%s",
                       join_id, join_from, ref);
-            max_generation_xml = copy_xml(generation);
+            max_generation_xml = pcmk__xml_copy(NULL, generation);
             pcmk__str_update(&max_generation_from, join_from);
         }
 
@@ -485,13 +496,14 @@ do_dc_join_filter_offer(long long action,
                    && pcmk__str_eq(join_from, controld_globals.our_nodename,
                                    pcmk__str_casei))) {
         const char *validation = crm_element_value(generation,
-                                                   XML_ATTR_VALIDATION);
+                                                   PCMK_XA_VALIDATE_WITH);
 
-        if (get_schema_version(validation) < 0) {
+        if (pcmk__get_schema(validation) == NULL) {
             crm_err("Rejecting join-%d request from %s (with better CIB "
                     "generation than current best from %s) due to unknown "
                     "schema version %s " CRM_XS " ref=%s",
-                    join_id, join_from, max_generation_from, validation, ref);
+                    join_id, join_from, max_generation_from,
+                    pcmk__s(validation, "(missing)"), ref);
             ack_nack_bool = FALSE;
 
         } else {
@@ -502,7 +514,7 @@ do_dc_join_filter_offer(long long action,
             crm_log_xml_debug(generation, "New max generation");
 
             free_xml(max_generation_xml);
-            max_generation_xml = copy_xml(join_ack->xml);
+            max_generation_xml = pcmk__xml_copy(NULL, join_ack->xml);
             pcmk__str_update(&max_generation_from, join_from);
         }
 
@@ -588,7 +600,7 @@ do_dc_join_finalize(long long action,
 
     if (pcmk_is_set(controld_globals.fsa_input_register, R_HAVE_CIB)) {
         // Send our CIB out to everyone
-        pcmk__str_update(&sync_from, controld_globals.our_nodename);
+        sync_from = pcmk__str_copy(controld_globals.our_nodename);
         crm_debug("Finalizing join-%d for %d node%s (sync'ing from local CIB)",
                   current_join_id, count_finalizable,
                   pcmk__plural_s(count_finalizable));
@@ -596,7 +608,7 @@ do_dc_join_finalize(long long action,
 
     } else {
         // Ask for the agreed best CIB
-        pcmk__str_update(&sync_from, max_generation_from);
+        sync_from = pcmk__str_copy(max_generation_from);
         crm_notice("Finalizing join-%d for %d node%s (sync'ing CIB from %s)",
                    current_join_id, count_finalizable,
                    pcmk__plural_s(count_finalizable), sync_from);
@@ -698,8 +710,8 @@ do_dc_join_ack(long long action,
     int join_id = -1;
     ha_msg_input_t *join_ack = fsa_typed_data(fsa_dt_ha_msg);
 
-    const char *op = crm_element_value(join_ack->msg, F_CRM_TASK);
-    char *join_from = crm_element_value_copy(join_ack->msg, F_CRM_HOST_FROM);
+    const char *op = crm_element_value(join_ack->msg, PCMK__XA_CRM_TASK);
+    char *join_from = crm_element_value_copy(join_ack->msg, PCMK__XA_SRC);
     crm_node_t *peer = NULL;
 
     enum controld_section_e section = controld_section_lrm;
@@ -726,13 +738,13 @@ do_dc_join_ack(long long action,
         goto done;
     }
 
-    if (crm_element_value_int(join_ack->msg, F_CRM_JOIN_ID, &join_id) != 0) {
+    if (crm_element_value_int(join_ack->msg, PCMK__XA_JOIN_ID, &join_id) != 0) {
         crm_warn("Ignoring join confirmation from %s without valid join ID",
                  join_from);
         goto done;
     }
 
-    peer = crm_get_peer(0, join_from);
+    peer = pcmk__get_node(0, join_from, NULL, pcmk__node_search_cluster_member);
     if (peer->join != crm_join_finalized) {
         crm_info("Ignoring out-of-sequence join-%d confirmation from %s "
                  "(currently %s not %s)",
@@ -800,7 +812,7 @@ do_dc_join_ack(long long action,
                   join_from, current_join_id);
     }
 
-    rc = cib->cmds->modify(cib, XML_CIB_TAG_STATUS, state,
+    rc = cib->cmds->modify(cib, PCMK_XE_STATUS, state,
                            cib_scope_local|cib_can_create|cib_transaction);
     free_xml(execd_state);
     if (rc != pcmk_ok) {
@@ -854,10 +866,10 @@ finalize_join_for(gpointer key, gpointer value, gpointer user_data)
      * weren't known before
      */
     crm_trace("Updating node name and UUID in CIB for %s", join_to);
-    tmp1 = create_xml_node(NULL, XML_CIB_TAG_NODE);
-    crm_xml_add(tmp1, XML_ATTR_ID, crm_peer_uuid(join_node));
-    crm_xml_add(tmp1, XML_ATTR_UNAME, join_to);
-    fsa_cib_anon_update(XML_CIB_TAG_NODES, tmp1);
+    tmp1 = pcmk__xe_create(NULL, PCMK_XE_NODE);
+    crm_xml_add(tmp1, PCMK_XA_ID, pcmk__cluster_node_uuid(join_node));
+    crm_xml_add(tmp1, PCMK_XA_UNAME, join_to);
+    fsa_cib_anon_update(PCMK_XE_NODES, tmp1);
     free_xml(tmp1);
 
     if (join_node->join == crm_join_nack_quiet) {
@@ -866,8 +878,9 @@ finalize_join_for(gpointer key, gpointer value, gpointer user_data)
         return;
     }
 
-    join_node = crm_get_peer(0, join_to);
-    if (!crm_is_peer_active(join_node)) {
+    join_node = pcmk__get_node(0, join_to, NULL,
+                               pcmk__node_search_cluster_member);
+    if (!pcmk__cluster_is_node_active(join_node)) {
         /*
          * NACK'ing nodes that the membership layer doesn't know about yet
          * simply creates more churn
@@ -896,10 +909,10 @@ finalize_join_for(gpointer key, gpointer value, gpointer user_data)
          * node hosts each to the ACK message.  This keeps new controllers in
          * sync with what has already happened.
          */
-        if (crm_remote_peer_cache_size() != 0) {
+        if (pcmk__cluster_num_remote_nodes() > 0) {
             GHashTableIter iter;
             crm_node_t *node = NULL;
-            xmlNode *remotes = create_xml_node(acknak, XML_CIB_TAG_NODES);
+            xmlNode *remotes = pcmk__xe_create(acknak, PCMK_XE_NODES);
 
             g_hash_table_iter_init(&iter, crm_remote_peer_cache);
             while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) {
@@ -909,16 +922,16 @@ finalize_join_for(gpointer key, gpointer value, gpointer user_data)
                     continue;
                 }
 
-                remote = create_xml_node(remotes, XML_CIB_TAG_NODE);
+                remote = pcmk__xe_create(remotes, PCMK_XE_NODE);
                 pcmk__xe_set_props(remote,
-                                   XML_ATTR_ID, node->uname,
-                                   XML_CIB_TAG_STATE, node->state,
-                                   PCMK__XA_CONN_HOST, node->conn_host,
+                                   PCMK_XA_ID, node->uname,
+                                   PCMK__XA_NODE_STATE, node->state,
+                                   PCMK__XA_CONNECTION_HOST, node->conn_host,
                                    NULL);
             }
         }
     }
-    send_cluster_message(join_node, crm_msg_crmd, acknak, TRUE);
+    pcmk__cluster_send_message(join_node, crm_msg_crmd, acknak);
     free_xml(acknak);
     return;
 }
diff --git a/daemons/controld/controld_membership.c b/daemons/controld/controld_membership.c
index f25d1e9..1079d6a 100644
--- a/daemons/controld/controld_membership.c
+++ b/daemons/controld/controld_membership.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -13,7 +13,6 @@
 #include <string.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/common/xml_internal.h>
 #include <crm/cluster/internal.h>
@@ -29,7 +28,7 @@ reap_dead_nodes(gpointer key, gpointer value, gpointer user_data)
 {
     crm_node_t *node = value;
 
-    if (crm_is_peer_active(node) == FALSE) {
+    if (!pcmk__cluster_is_node_active(node)) {
         crm_update_peer_join(__func__, node, crm_join_none);
 
         if(node && node->uname) {
@@ -85,7 +84,7 @@ post_cache_update(int instance)
      */
     no_op = create_request(CRM_OP_NOOP, NULL, NULL, CRM_SYSTEM_CRMD,
                            AM_I_DC ? CRM_SYSTEM_DC : CRM_SYSTEM_CRMD, NULL);
-    send_cluster_message(NULL, crm_msg_crmd, no_op, FALSE);
+    pcmk__cluster_send_message(NULL, crm_msg_crmd, no_op);
     free_xml(no_op);
 }
 
@@ -132,19 +131,20 @@ create_node_state_update(crm_node_t *node, int flags, xmlNode *parent,
        return NULL;
     }
 
-    node_state = create_xml_node(parent, XML_CIB_TAG_STATE);
+    node_state = pcmk__xe_create(parent, PCMK__XE_NODE_STATE);
 
     if (pcmk_is_set(node->flags, crm_remote_node)) {
-        pcmk__xe_set_bool_attr(node_state, XML_NODE_IS_REMOTE, true);
+        pcmk__xe_set_bool_attr(node_state, PCMK_XA_REMOTE_NODE, true);
     }
 
-    if (crm_xml_add(node_state, XML_ATTR_ID, crm_peer_uuid(node)) == NULL) {
+    if (crm_xml_add(node_state, PCMK_XA_ID,
+                    pcmk__cluster_node_uuid(node)) == NULL) {
         crm_info("Node update for %s cancelled: no ID", node->uname);
         free_xml(node_state);
         return NULL;
     }
 
-    crm_xml_add(node_state, XML_ATTR_UNAME, node->uname);
+    crm_xml_add(node_state, PCMK_XA_UNAME, node->uname);
 
     if ((flags & node_update_cluster) && node->state) {
         if (compare_version(controld_globals.dc_version, "3.18.0") >= 0) {
@@ -162,15 +162,15 @@ create_node_state_update(crm_node_t *node, int flags, xmlNode *parent,
         if (flags & node_update_peer) {
             if (compare_version(controld_globals.dc_version, "3.18.0") >= 0) {
                 // A value 0 means the peer is offline in CPG.
-                crm_xml_add_ll(node_state, PCMK__XA_CRMD, node->when_online);
+                crm_xml_add_ll(node_state, PCMK_XA_CRMD, node->when_online);
 
             } else {
                 // @COMPAT DCs < 2.1.7 use online/offline rather than timestamp
-                value = OFFLINESTATUS;
+                value = PCMK_VALUE_OFFLINE;
                 if (pcmk_is_set(node->processes, crm_get_cluster_proc())) {
-                    value = ONLINESTATUS;
+                    value = PCMK_VALUE_ONLINE;
                 }
-                crm_xml_add(node_state, PCMK__XA_CRMD, value);
+                crm_xml_add(node_state, PCMK_XA_CRMD, value);
             }
         }
 
@@ -184,11 +184,11 @@ create_node_state_update(crm_node_t *node, int flags, xmlNode *parent,
         }
 
         if (flags & node_update_expected) {
-            crm_xml_add(node_state, PCMK__XA_EXPECTED, node->expected);
+            crm_xml_add(node_state, PCMK_XA_EXPECTED, node->expected);
         }
     }
 
-    crm_xml_add(node_state, XML_ATTR_ORIGIN, source);
+    crm_xml_add(node_state, PCMK_XA_CRM_DEBUG_ORIGIN, source);
 
     return node_state;
 }
@@ -222,26 +222,22 @@ search_conflicting_node_callback(xmlNode * msg, int call_id, int rc,
         return;
     }
 
-    if (pcmk__xe_is(output, XML_CIB_TAG_NODE)) {
+    if (pcmk__xe_is(output, PCMK_XE_NODE)) {
         node_xml = output;
 
     } else {
-        node_xml = pcmk__xml_first_child(output);
+        node_xml = pcmk__xe_first_child(output, PCMK_XE_NODE, NULL, NULL);
     }
 
-    for (; node_xml != NULL; node_xml = pcmk__xml_next(node_xml)) {
+    for (; node_xml != NULL; node_xml = pcmk__xe_next_same(node_xml)) {
         const char *node_uuid = NULL;
         const char *node_uname = NULL;
         GHashTableIter iter;
         crm_node_t *node = NULL;
         gboolean known = FALSE;
 
-        if (!pcmk__xe_is(node_xml, XML_CIB_TAG_NODE)) {
-            continue;
-        }
-
-        node_uuid = crm_element_value(node_xml, XML_ATTR_ID);
-        node_uname = crm_element_value(node_xml, XML_ATTR_UNAME);
+        node_uuid = crm_element_value(node_xml, PCMK_XA_ID);
+        node_uname = crm_element_value(node_xml, PCMK_XA_UNAME);
 
         if (node_uuid == NULL || node_uname == NULL) {
             continue;
@@ -267,20 +263,19 @@ search_conflicting_node_callback(xmlNode * msg, int call_id, int rc,
             crm_notice("Deleting unknown node %s/%s which has conflicting uname with %s",
                        node_uuid, node_uname, new_node_uuid);
 
-            delete_call_id = cib_conn->cmds->remove(cib_conn, XML_CIB_TAG_NODES,
+            delete_call_id = cib_conn->cmds->remove(cib_conn, PCMK_XE_NODES,
                                                     node_xml, cib_scope_local);
-            fsa_register_cib_callback(delete_call_id, strdup(node_uuid),
+            fsa_register_cib_callback(delete_call_id, pcmk__str_copy(node_uuid),
                                       remove_conflicting_node_callback);
 
-            node_state_xml = create_xml_node(NULL, XML_CIB_TAG_STATE);
-            crm_xml_add(node_state_xml, XML_ATTR_ID, node_uuid);
-            crm_xml_add(node_state_xml, XML_ATTR_UNAME, node_uname);
+            node_state_xml = pcmk__xe_create(NULL, PCMK__XE_NODE_STATE);
+            crm_xml_add(node_state_xml, PCMK_XA_ID, node_uuid);
+            crm_xml_add(node_state_xml, PCMK_XA_UNAME, node_uname);
 
-            delete_call_id = cib_conn->cmds->remove(cib_conn,
-                                                    XML_CIB_TAG_STATUS,
+            delete_call_id = cib_conn->cmds->remove(cib_conn, PCMK_XE_STATUS,
                                                     node_state_xml,
                                                     cib_scope_local);
-            fsa_register_cib_callback(delete_call_id, strdup(node_uuid),
+            fsa_register_cib_callback(delete_call_id, pcmk__str_copy(node_uuid),
                                       remove_conflicting_node_callback);
             free_xml(node_state_xml);
         }
@@ -311,10 +306,12 @@ populate_cib_nodes(enum node_update_flags flags, const char *source)
 
     int call_id = 0;
     gboolean from_hashtable = TRUE;
-    xmlNode *node_list = create_xml_node(NULL, XML_CIB_TAG_NODES);
+    xmlNode *node_list = pcmk__xe_create(NULL, PCMK_XE_NODES);
 
 #if SUPPORT_COROSYNC
-    if (!pcmk_is_set(flags, node_update_quick) && is_corosync_cluster()) {
+    if (!pcmk_is_set(flags, node_update_quick)
+        && (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync)) {
+
         from_hashtable = pcmk__corosync_add_nodes(node_list);
     }
 #endif
@@ -337,22 +334,22 @@ populate_cib_nodes(enum node_update_flags flags, const char *source)
                 }
 
                 /* We need both to be valid */
-                new_node = create_xml_node(node_list, XML_CIB_TAG_NODE);
-                crm_xml_add(new_node, XML_ATTR_ID, node->uuid);
-                crm_xml_add(new_node, XML_ATTR_UNAME, node->uname);
+                new_node = pcmk__xe_create(node_list, PCMK_XE_NODE);
+                crm_xml_add(new_node, PCMK_XA_ID, node->uuid);
+                crm_xml_add(new_node, PCMK_XA_UNAME, node->uname);
 
                 /* Search and remove unknown nodes with the conflicting uname from CIB */
                 pcmk__g_strcat(xpath,
-                               "/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION
-                               "/" XML_CIB_TAG_NODES "/" XML_CIB_TAG_NODE
-                               "[@" XML_ATTR_UNAME "='", node->uname, "']"
-                               "[@" XML_ATTR_ID "!='", node->uuid, "']", NULL);
+                               "/" PCMK_XE_CIB "/" PCMK_XE_CONFIGURATION
+                               "/" PCMK_XE_NODES "/" PCMK_XE_NODE
+                               "[@" PCMK_XA_UNAME "='", node->uname, "']"
+                               "[@" PCMK_XA_ID "!='", node->uuid, "']", NULL);
 
                 call_id = cib_conn->cmds->query(cib_conn,
                                                 (const char *) xpath->str,
                                                 NULL,
                                                 cib_scope_local|cib_xpath);
-                fsa_register_cib_callback(call_id, strdup(node->uuid),
+                fsa_register_cib_callback(call_id, pcmk__str_copy(node->uuid),
                                           search_conflicting_node_callback);
             }
         }
@@ -364,7 +361,7 @@ populate_cib_nodes(enum node_update_flags flags, const char *source)
 
     crm_trace("Populating <nodes> section from %s", from_hashtable ? "hashtable" : "cluster");
 
-    if ((controld_update_cib(XML_CIB_TAG_NODES, node_list, cib_scope_local,
+    if ((controld_update_cib(PCMK_XE_NODES, node_list, cib_scope_local,
                              node_list_update_callback) == pcmk_rc_ok)
          && (crm_peer_cache != NULL) && AM_I_DC) {
         /*
@@ -375,7 +372,7 @@ populate_cib_nodes(enum node_update_flags flags, const char *source)
         crm_node_t *node = NULL;
 
         free_xml(node_list);
-        node_list = create_xml_node(NULL, XML_CIB_TAG_STATUS);
+        node_list = pcmk__xe_create(NULL, PCMK_XE_STATUS);
 
         g_hash_table_iter_init(&iter, crm_peer_cache);
         while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) {
@@ -389,7 +386,7 @@ populate_cib_nodes(enum node_update_flags flags, const char *source)
             }
         }
 
-        controld_update_cib(XML_CIB_TAG_STATUS, node_list, cib_scope_local,
+        controld_update_cib(PCMK_XE_STATUS, node_list, cib_scope_local,
                             crmd_node_update_complete);
     }
     free_xml(node_list);
@@ -429,12 +426,12 @@ crm_update_quorum(gboolean quorum, gboolean force_update)
             || force_update)) {
         xmlNode *update = NULL;
 
-        update = create_xml_node(NULL, XML_TAG_CIB);
-        crm_xml_add_int(update, XML_ATTR_HAVE_QUORUM, quorum);
-        crm_xml_add(update, XML_ATTR_DC_UUID, controld_globals.our_uuid);
+        update = pcmk__xe_create(NULL, PCMK_XE_CIB);
+        crm_xml_add_int(update, PCMK_XA_HAVE_QUORUM, quorum);
+        crm_xml_add(update, PCMK_XA_DC_UUID, controld_globals.our_uuid);
 
         crm_debug("Updating quorum status to %s", pcmk__btoa(quorum));
-        controld_update_cib(XML_TAG_CIB, update, cib_scope_local,
+        controld_update_cib(PCMK_XE_CIB, update, cib_scope_local,
                             cib_quorum_update_complete);
         free_xml(update);
 
@@ -453,11 +450,11 @@ crm_update_quorum(gboolean quorum, gboolean force_update)
              * nodes are joining around the same time, so the one that brings us
              * to quorum doesn't cause all the remaining ones to be fenced.
              */
-            abort_after_delay(INFINITY, pcmk__graph_restart, "Quorum gained",
-                              5000);
+            abort_after_delay(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                              "Quorum gained", 5000);
         } else {
-            abort_transition(INFINITY, pcmk__graph_restart, "Quorum lost",
-                             NULL);
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                             "Quorum lost", NULL);
         }
     }
 
diff --git a/daemons/controld/controld_messages.c b/daemons/controld/controld_messages.c
index 39f3c7a..5f7a78c 100644
--- a/daemons/controld/controld_messages.c
+++ b/daemons/controld/controld_messages.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,6 @@
 #include <time.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/cluster/internal.h>
 #include <crm/cib.h>
@@ -22,8 +21,6 @@
 
 #include <pacemaker-controld.h>
 
-extern void crm_shutdown(int nsig);
-
 static enum crmd_fsa_input handle_message(xmlNode *msg,
                                           enum crmd_fsa_cause cause);
 static void handle_response(xmlNode *stored_msg);
@@ -102,7 +99,7 @@ register_fsa_input_adv(enum crmd_fsa_cause cause, enum crmd_fsa_input input,
               fsa_input2string(input), fsa_cause2string(cause),
               (data? "with" : "without"));
 
-    fsa_data = calloc(1, sizeof(fsa_data_t));
+    fsa_data = pcmk__assert_alloc(1, sizeof(fsa_data_t));
     fsa_data->id = last_data_id;
     fsa_data->fsa_input = input;
     fsa_data->fsa_cause = cause;
@@ -191,11 +188,14 @@ fsa_dump_queue(int log_level)
 ha_msg_input_t *
 copy_ha_msg_input(ha_msg_input_t * orig)
 {
-    ha_msg_input_t *copy = calloc(1, sizeof(ha_msg_input_t));
+    xmlNode *wrapper = NULL;
+
+    ha_msg_input_t *copy = pcmk__assert_alloc(1, sizeof(ha_msg_input_t));
+
+    copy->msg = (orig != NULL)? pcmk__xml_copy(NULL, orig->msg) : NULL;
 
-    CRM_ASSERT(copy != NULL);
-    copy->msg = (orig && orig->msg)? copy_xml(orig->msg) : NULL;
-    copy->xml = get_message_xml(copy->msg, F_CRM_DATA);
+    wrapper = pcmk__xe_first_child(copy->msg, PCMK__XE_CRM_XML, NULL, NULL);
+    copy->xml = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
     return copy;
 }
 
@@ -328,7 +328,7 @@ route_message(enum crmd_fsa_cause cause, xmlNode * input)
 gboolean
 relay_message(xmlNode * msg, gboolean originated_locally)
 {
-    enum crm_ais_msg_types dest = crm_msg_ais;
+    enum crm_ais_msg_types dest = crm_msg_none;
     bool is_for_dc = false;
     bool is_for_dcib = false;
     bool is_for_te = false;
@@ -346,12 +346,12 @@ relay_message(xmlNode * msg, gboolean originated_locally)
 
     CRM_CHECK(msg != NULL, return TRUE);
 
-    host_to = crm_element_value(msg, F_CRM_HOST_TO);
-    sys_to = crm_element_value(msg, F_CRM_SYS_TO);
-    sys_from = crm_element_value(msg, F_CRM_SYS_FROM);
-    type = crm_element_value(msg, F_TYPE);
-    task = crm_element_value(msg, F_CRM_TASK);
-    ref = crm_element_value(msg, XML_ATTR_REFERENCE);
+    host_to = crm_element_value(msg, PCMK__XA_CRM_HOST_TO);
+    sys_to = crm_element_value(msg, PCMK__XA_CRM_SYS_TO);
+    sys_from = crm_element_value(msg, PCMK__XA_CRM_SYS_FROM);
+    type = crm_element_value(msg, PCMK__XA_T);
+    task = crm_element_value(msg, PCMK__XA_CRM_TASK);
+    ref = crm_element_value(msg, PCMK_XA_REFERENCE);
 
     broadcast = pcmk__str_empty(host_to);
 
@@ -367,8 +367,9 @@ relay_message(xmlNode * msg, gboolean originated_locally)
     }
 
     // Require message type (set by create_request())
-    if (!pcmk__str_eq(type, T_CRM, pcmk__str_casei)) {
-        crm_warn("Ignoring invalid message %s with type '%s' (not '" T_CRM "')",
+    if (!pcmk__str_eq(type, PCMK__VALUE_CRMD, pcmk__str_none)) {
+        crm_warn("Ignoring invalid message %s with type '%s' "
+                 "(not '" PCMK__VALUE_CRMD "')",
                  ref, pcmk__s(type, ""));
         crm_log_xml_trace(msg, "ignored");
         return TRUE;
@@ -376,15 +377,16 @@ relay_message(xmlNode * msg, gboolean originated_locally)
 
     // Require a destination subsystem (also set by create_request())
     if (sys_to == NULL) {
-        crm_warn("Ignoring invalid message %s with no " F_CRM_SYS_TO, ref);
+        crm_warn("Ignoring invalid message %s with no " PCMK__XA_CRM_SYS_TO,
+                 ref);
         crm_log_xml_trace(msg, "ignored");
         return TRUE;
     }
 
     // Get the message type appropriate to the destination subsystem
-    if (is_corosync_cluster()) {
-        dest = text2msg_type(sys_to);
-        if ((dest < crm_msg_ais) || (dest > crm_msg_stonith_ng)) {
+    if (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync) {
+        dest = pcmk__cluster_parse_msg_type(sys_to);
+        if (dest == crm_msg_none) {
             /* Unrecognized value, use a sane default
              *
              * @TODO Maybe we should bail instead
@@ -427,10 +429,12 @@ relay_message(xmlNode * msg, gboolean originated_locally)
         is_local = true;
 
     } else if (is_for_crm && pcmk__str_eq(task, CRM_OP_LRM_DELETE, pcmk__str_casei)) {
-        xmlNode *msg_data = get_message_xml(msg, F_CRM_DATA);
+        xmlNode *wrapper = pcmk__xe_first_child(msg, PCMK__XE_CRM_XML, NULL,
+                                                NULL);
+        xmlNode *msg_data = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
         const char *mode = crm_element_value(msg_data, PCMK__XA_MODE);
 
-        if (pcmk__str_eq(mode, XML_TAG_CIB, pcmk__str_casei)) {
+        if (pcmk__str_eq(mode, PCMK__VALUE_CIB, pcmk__str_none)) {
             // Local delete of an offline node's resource history
             is_local = true;
         }
@@ -458,9 +462,10 @@ relay_message(xmlNode * msg, gboolean originated_locally)
                       ref, pcmk__s(host_to, "broadcast"));
             crm_log_xml_trace(msg, "relayed");
             if (!broadcast) {
-                node_to = crm_get_peer(0, host_to);
+                node_to = pcmk__get_node(0, host_to, NULL,
+                                         pcmk__node_search_cluster_member);
             }
-            send_cluster_message(node_to, dest, msg, TRUE);
+            pcmk__cluster_send_message(node_to, dest, msg);
             return TRUE;
         }
 
@@ -484,7 +489,8 @@ relay_message(xmlNode * msg, gboolean originated_locally)
     }
 
     if (!broadcast) {
-        node_to = pcmk__search_cluster_node_cache(0, host_to, NULL);
+        node_to = pcmk__search_node_caches(0, host_to,
+                                           pcmk__node_search_cluster_member);
         if (node_to == NULL) {
             crm_warn("Ignoring message %s because node %s is unknown",
                      ref, host_to);
@@ -496,7 +502,7 @@ relay_message(xmlNode * msg, gboolean originated_locally)
     crm_trace("Relay message %s to %s",
               ref, pcmk__s(host_to, "all peers"));
     crm_log_xml_trace(msg, "relayed");
-    send_cluster_message(node_to, dest, msg, TRUE);
+    pcmk__cluster_send_message(node_to, dest, msg);
     return TRUE;
 }
 
@@ -539,10 +545,11 @@ bool
 controld_authorize_ipc_message(const xmlNode *client_msg, pcmk__client_t *curr_client,
                                const char *proxy_session)
 {
+    xmlNode *wrapper = NULL;
     xmlNode *message_data = NULL;
     const char *client_name = NULL;
-    const char *op = crm_element_value(client_msg, F_CRM_TASK);
-    const char *ref = crm_element_value(client_msg, XML_ATTR_REFERENCE);
+    const char *op = crm_element_value(client_msg, PCMK__XA_CRM_TASK);
+    const char *ref = crm_element_value(client_msg, PCMK_XA_REFERENCE);
     const char *uuid = (curr_client? curr_client->id : proxy_session);
 
     if (uuid == NULL) {
@@ -556,27 +563,28 @@ controld_authorize_ipc_message(const xmlNode *client_msg, pcmk__client_t *curr_c
         return true;
     }
 
-    message_data = get_message_xml(client_msg, F_CRM_DATA);
+    wrapper = pcmk__xe_first_child(client_msg, PCMK__XE_CRM_XML, NULL, NULL);
+    message_data = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
-    client_name = crm_element_value(message_data, "client_name");
+    client_name = crm_element_value(message_data, PCMK__XA_CLIENT_NAME);
     if (pcmk__str_empty(client_name)) {
         crm_warn("IPC hello from client rejected: No client name",
                  CRM_XS " ref=%s uuid=%s", (ref? ref : "none"), uuid);
         goto rejected;
     }
-    if (!authorize_version(message_data, "major_version", client_name, ref,
-                           uuid)) {
+    if (!authorize_version(message_data, PCMK__XA_MAJOR_VERSION, client_name,
+                           ref, uuid)) {
         goto rejected;
     }
-    if (!authorize_version(message_data, "minor_version", client_name, ref,
-                           uuid)) {
+    if (!authorize_version(message_data, PCMK__XA_MINOR_VERSION, client_name,
+                           ref, uuid)) {
         goto rejected;
     }
 
     crm_trace("Validated IPC hello from client %s", client_name);
     crm_log_xml_trace(client_msg, "hello");
     if (curr_client) {
-        curr_client->userdata = strdup(client_name);
+        curr_client->userdata = pcmk__str_copy(client_name);
     }
     controld_trigger_fsa();
     return false;
@@ -596,16 +604,17 @@ handle_message(xmlNode *msg, enum crmd_fsa_cause cause)
 
     CRM_CHECK(msg != NULL, return I_NULL);
 
-    type = crm_element_value(msg, F_CRM_MSG_TYPE);
-    if (pcmk__str_eq(type, XML_ATTR_REQUEST, pcmk__str_none)) {
+    type = crm_element_value(msg, PCMK__XA_SUBT);
+    if (pcmk__str_eq(type, PCMK__VALUE_REQUEST, pcmk__str_none)) {
         return handle_request(msg, cause);
+    }
 
-    } else if (pcmk__str_eq(type, XML_ATTR_RESPONSE, pcmk__str_none)) {
+    if (pcmk__str_eq(type, PCMK__VALUE_RESPONSE, pcmk__str_none)) {
         handle_response(msg);
         return I_NULL;
     }
 
-    crm_warn("Ignoring message with unknown " F_CRM_MSG_TYPE " '%s'",
+    crm_warn("Ignoring message with unknown " PCMK__XA_SUBT" '%s'",
              pcmk__s(type, ""));
     crm_log_xml_trace(msg, "bad");
     return I_NULL;
@@ -620,31 +629,36 @@ handle_failcount_op(xmlNode * stored_msg)
     char *interval_spec = NULL;
     guint interval_ms = 0;
     gboolean is_remote_node = FALSE;
-    xmlNode *xml_op = get_message_xml(stored_msg, F_CRM_DATA);
+
+    xmlNode *wrapper = pcmk__xe_first_child(stored_msg, PCMK__XE_CRM_XML, NULL,
+                                            NULL);
+    xmlNode *xml_op = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
     if (xml_op) {
-        xmlNode *xml_rsc = first_named_child(xml_op, XML_CIB_TAG_RESOURCE);
-        xmlNode *xml_attrs = first_named_child(xml_op, XML_TAG_ATTRS);
+        xmlNode *xml_rsc = pcmk__xe_first_child(xml_op, PCMK_XE_PRIMITIVE, NULL,
+                                                NULL);
+        xmlNode *xml_attrs = pcmk__xe_first_child(xml_op, PCMK__XE_ATTRIBUTES,
+                                                  NULL, NULL);
 
         if (xml_rsc) {
-            rsc = ID(xml_rsc);
+            rsc = pcmk__xe_id(xml_rsc);
         }
         if (xml_attrs) {
             op = crm_element_value(xml_attrs,
-                                   CRM_META "_" XML_RSC_ATTR_CLEAR_OP);
+                                   CRM_META "_" PCMK__META_CLEAR_FAILURE_OP);
             crm_element_value_ms(xml_attrs,
-                                 CRM_META "_" XML_RSC_ATTR_CLEAR_INTERVAL,
+                                 CRM_META "_" PCMK__META_CLEAR_FAILURE_INTERVAL,
                                  &interval_ms);
         }
     }
-    uname = crm_element_value(xml_op, XML_LRM_ATTR_TARGET);
+    uname = crm_element_value(xml_op, PCMK__META_ON_NODE);
 
     if ((rsc == NULL) || (uname == NULL)) {
         crm_log_xml_warn(stored_msg, "invalid failcount op");
         return I_NULL;
     }
 
-    if (crm_element_value(xml_op, XML_LRM_ATTR_ROUTER_NODE)) {
+    if (crm_element_value(xml_op, PCMK__XA_ROUTER_NODE)) {
         is_remote_node = TRUE;
     }
 
@@ -669,7 +683,9 @@ static enum crmd_fsa_input
 handle_lrm_delete(xmlNode *stored_msg)
 {
     const char *mode = NULL;
-    xmlNode *msg_data = get_message_xml(stored_msg, F_CRM_DATA);
+    xmlNode *wrapper = pcmk__xe_first_child(stored_msg, PCMK__XE_CRM_XML, NULL,
+                                            NULL);
+    xmlNode *msg_data = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
     CRM_CHECK(msg_data != NULL, return I_NULL);
 
@@ -679,14 +695,14 @@ handle_lrm_delete(xmlNode *stored_msg)
      * CIB, and do some bookkeeping in the controller.
      *
      * However, if the affected node is offline, the client will specify
-     * mode="cib" which means the controller receiving the operation should
-     * clear the resource's history from the CIB and nothing else. This is used
-     * to clear shutdown locks.
+     * mode=PCMK__VALUE_CIB which means the controller receiving the operation
+     * should clear the resource's history from the CIB and nothing else. This
+     * is used to clear shutdown locks.
      */
     mode = crm_element_value(msg_data, PCMK__XA_MODE);
-    if ((mode == NULL) || strcmp(mode, XML_TAG_CIB)) {
+    if (!pcmk__str_eq(mode, PCMK__VALUE_CIB, pcmk__str_none)) {
         // Relay to affected node
-        crm_xml_add(stored_msg, F_CRM_SYS_TO, CRM_SYSTEM_LRMD);
+        crm_xml_add(stored_msg, PCMK__XA_CRM_SYS_TO, CRM_SYSTEM_LRMD);
         return I_ROUTER;
 
     } else {
@@ -698,13 +714,13 @@ handle_lrm_delete(xmlNode *stored_msg)
         xmlNode *rsc_xml = NULL;
         int rc = pcmk_rc_ok;
 
-        rsc_xml = first_named_child(msg_data, XML_CIB_TAG_RESOURCE);
+        rsc_xml = pcmk__xe_first_child(msg_data, PCMK_XE_PRIMITIVE, NULL, NULL);
         CRM_CHECK(rsc_xml != NULL, return I_NULL);
 
-        rsc_id = ID(rsc_xml);
-        from_sys = crm_element_value(stored_msg, F_CRM_SYS_FROM);
-        node = crm_element_value(msg_data, XML_LRM_ATTR_TARGET);
-        user_name = pcmk__update_acl_user(stored_msg, F_CRM_USER, NULL);
+        rsc_id = pcmk__xe_id(rsc_xml);
+        from_sys = crm_element_value(stored_msg, PCMK__XA_CRM_SYS_FROM);
+        node = crm_element_value(msg_data, PCMK__META_ON_NODE);
+        user_name = pcmk__update_acl_user(stored_msg, PCMK__XA_CRM_USER, NULL);
         crm_debug("Handling " CRM_OP_LRM_DELETE " for %s on %s locally%s%s "
                   "(clearing CIB resource history only)", rsc_id, node,
                   (user_name? " for user " : ""), (user_name? user_name : ""));
@@ -715,19 +731,20 @@ handle_lrm_delete(xmlNode *stored_msg)
                                                   crmd_cib_smart_opt());
         }
 
-        //Notify client and tengine.(Only notify tengine if mode = "cib" and CRM_OP_LRM_DELETE.)
+        /* Notify client. Also notify tengine if mode=PCMK__VALUE_CIB and
+         * op=CRM_OP_LRM_DELETE.
+         */
         if (from_sys) {
             lrmd_event_data_t *op = NULL;
-            const char *from_host = crm_element_value(stored_msg,
-                                                      F_CRM_HOST_FROM);
+            const char *from_host = crm_element_value(stored_msg, PCMK__XA_SRC);
             const char *transition;
 
             if (strcmp(from_sys, CRM_SYSTEM_TENGINE)) {
                 transition = crm_element_value(msg_data,
-                                                       XML_ATTR_TRANSITION_KEY);
+                                               PCMK__XA_TRANSITION_KEY);
             } else {
                 transition = crm_element_value(stored_msg,
-                                                       XML_ATTR_TRANSITION_KEY);
+                                               PCMK__XA_TRANSITION_KEY);
             }
 
             crm_info("Notifying %s on %s that %s was%s deleted",
@@ -735,10 +752,10 @@ handle_lrm_delete(xmlNode *stored_msg)
                      ((rc == pcmk_rc_ok)? "" : " not"));
             op = lrmd_new_event(rsc_id, PCMK_ACTION_DELETE, 0);
             op->type = lrmd_event_exec_complete;
-            op->user_data = strdup(transition? transition : FAKE_TE_ID);
+            op->user_data = pcmk__str_copy(pcmk__s(transition, FAKE_TE_ID));
             op->params = pcmk__strkey_table(free, free);
-            g_hash_table_insert(op->params, strdup(XML_ATTR_CRM_VERSION),
-                                strdup(CRM_FEATURE_SET));
+            pcmk__insert_dup(op->params, PCMK_XA_CRM_FEATURE_SET,
+                             CRM_FEATURE_SET);
             controld_rc2event(op, rc);
             controld_ack_event_directly(from_host, from_sys, NULL, op, rsc_id);
             lrmd_free_event(op);
@@ -759,7 +776,7 @@ static enum crmd_fsa_input
 handle_remote_state(const xmlNode *msg)
 {
     const char *conn_host = NULL;
-    const char *remote_uname = ID(msg);
+    const char *remote_uname = pcmk__xe_id(msg);
     crm_node_t *remote_peer;
     bool remote_is_up = false;
     int rc = pcmk_rc_ok;
@@ -768,14 +785,14 @@ handle_remote_state(const xmlNode *msg)
 
     CRM_CHECK(remote_uname && rc == pcmk_rc_ok, return I_NULL);
 
-    remote_peer = crm_remote_peer_get(remote_uname);
+    remote_peer = pcmk__cluster_lookup_remote_node(remote_uname);
     CRM_CHECK(remote_peer, return I_NULL);
 
     pcmk__update_peer_state(__func__, remote_peer,
                             remote_is_up ? CRM_NODE_MEMBER : CRM_NODE_LOST,
                             0);
 
-    conn_host = crm_element_value(msg, PCMK__XA_CONN_HOST);
+    conn_host = crm_element_value(msg, PCMK__XA_CONNECTION_HOST);
     if (conn_host) {
         pcmk__str_update(&remote_peer->conn_host, conn_host);
     } else if (remote_peer->conn_host) {
@@ -802,18 +819,18 @@ handle_ping(const xmlNode *msg)
 
     // Build reply
 
-    ping = create_xml_node(NULL, XML_CRM_TAG_PING);
-    value = crm_element_value(msg, F_CRM_SYS_TO);
-    crm_xml_add(ping, XML_PING_ATTR_SYSFROM, value);
+    ping = pcmk__xe_create(NULL, PCMK__XE_PING_RESPONSE);
+    value = crm_element_value(msg, PCMK__XA_CRM_SYS_TO);
+    crm_xml_add(ping, PCMK__XA_CRM_SUBSYSTEM, value);
 
     // Add controller state
     value = fsa_state2string(controld_globals.fsa_state);
-    crm_xml_add(ping, XML_PING_ATTR_CRMDSTATE, value);
+    crm_xml_add(ping, PCMK__XA_CRMD_STATE, value);
     crm_notice("Current ping state: %s", value); // CTS needs this
 
     // Add controller health
     // @TODO maybe do some checks to determine meaningful status
-    crm_xml_add(ping, XML_PING_ATTR_STATUS, "ok");
+    crm_xml_add(ping, PCMK_XA_RESULT, "ok");
 
     // Send reply
     reply = create_reply(msg, ping);
@@ -843,13 +860,13 @@ handle_node_list(const xmlNode *request)
     xmlNode *reply_data = NULL;
 
     // Create message data for reply
-    reply_data = create_xml_node(NULL, XML_CIB_TAG_NODES);
+    reply_data = pcmk__xe_create(NULL, PCMK_XE_NODES);
     g_hash_table_iter_init(&iter, crm_peer_cache);
     while (g_hash_table_iter_next(&iter, NULL, (gpointer *) & node)) {
-        xmlNode *xml = create_xml_node(reply_data, XML_CIB_TAG_NODE);
+        xmlNode *xml = pcmk__xe_create(reply_data, PCMK_XE_NODE);
 
-        crm_xml_add_ll(xml, XML_ATTR_ID, (long long) node->id); // uint32_t
-        crm_xml_add(xml, XML_ATTR_UNAME, node->uname);
+        crm_xml_add_ll(xml, PCMK_XA_ID, (long long) node->id); // uint32_t
+        crm_xml_add(xml, PCMK_XA_UNAME, node->uname);
         crm_xml_add(xml, PCMK__XA_IN_CCM, node->state);
     }
 
@@ -883,32 +900,32 @@ handle_node_info_request(const xmlNode *msg)
 
     // Build reply
 
-    reply_data = create_xml_node(NULL, XML_CIB_TAG_NODE);
-    crm_xml_add(reply_data, XML_PING_ATTR_SYSFROM, CRM_SYSTEM_CRMD);
+    reply_data = pcmk__xe_create(NULL, PCMK_XE_NODE);
+    crm_xml_add(reply_data, PCMK__XA_CRM_SUBSYSTEM, CRM_SYSTEM_CRMD);
 
     // Add whether current partition has quorum
-    pcmk__xe_set_bool_attr(reply_data, XML_ATTR_HAVE_QUORUM,
+    pcmk__xe_set_bool_attr(reply_data, PCMK_XA_HAVE_QUORUM,
                            pcmk_is_set(controld_globals.flags,
                                        controld_has_quorum));
 
     // Check whether client requested node info by ID and/or name
-    crm_element_value_int(msg, XML_ATTR_ID, &node_id);
+    crm_element_value_int(msg, PCMK_XA_ID, &node_id);
     if (node_id < 0) {
         node_id = 0;
     }
-    value = crm_element_value(msg, XML_ATTR_UNAME);
+    value = crm_element_value(msg, PCMK_XA_UNAME);
 
     // Default to local node if none given
     if ((node_id == 0) && (value == NULL)) {
         value = controld_globals.our_nodename;
     }
 
-    node = pcmk__search_node_caches(node_id, value, CRM_GET_PEER_ANY);
+    node = pcmk__search_node_caches(node_id, value, pcmk__node_search_any);
     if (node) {
-        crm_xml_add(reply_data, XML_ATTR_ID, node->uuid);
-        crm_xml_add(reply_data, XML_ATTR_UNAME, node->uname);
-        crm_xml_add(reply_data, PCMK__XA_CRMD, node->state);
-        pcmk__xe_set_bool_attr(reply_data, XML_NODE_IS_REMOTE,
+        crm_xml_add(reply_data, PCMK_XA_ID, node->uuid);
+        crm_xml_add(reply_data, PCMK_XA_UNAME, node->uname);
+        crm_xml_add(reply_data, PCMK_XA_CRMD, node->state);
+        pcmk__xe_set_bool_attr(reply_data, PCMK_XA_REMOTE_NODE,
                                pcmk_is_set(node->flags, crm_remote_node));
     }
 
@@ -927,7 +944,7 @@ handle_node_info_request(const xmlNode *msg)
 static void
 verify_feature_set(xmlNode *msg)
 {
-    const char *dc_version = crm_element_value(msg, XML_ATTR_CRM_VERSION);
+    const char *dc_version = crm_element_value(msg, PCMK_XA_CRM_FEATURE_SET);
 
     if (dc_version == NULL) {
         /* All we really know is that the DC feature set is older than 3.1.0,
@@ -953,7 +970,7 @@ verify_feature_set(xmlNode *msg)
 static enum crmd_fsa_input
 handle_shutdown_self_ack(xmlNode *stored_msg)
 {
-    const char *host_from = crm_element_value(stored_msg, F_CRM_HOST_FROM);
+    const char *host_from = crm_element_value(stored_msg, PCMK__XA_SRC);
 
     if (pcmk_is_set(controld_globals.fsa_input_register, R_SHUTDOWN)) {
         // The expected case -- we initiated own shutdown sequence
@@ -986,7 +1003,7 @@ handle_shutdown_self_ack(xmlNode *stored_msg)
 static enum crmd_fsa_input
 handle_shutdown_ack(xmlNode *stored_msg)
 {
-    const char *host_from = crm_element_value(stored_msg, F_CRM_HOST_FROM);
+    const char *host_from = crm_element_value(stored_msg, PCMK__XA_SRC);
 
     if (host_from == NULL) {
         crm_warn("Ignoring shutdown request without origin specified");
@@ -1016,19 +1033,20 @@ static enum crmd_fsa_input
 handle_request(xmlNode *stored_msg, enum crmd_fsa_cause cause)
 {
     xmlNode *msg = NULL;
-    const char *op = crm_element_value(stored_msg, F_CRM_TASK);
+    const char *op = crm_element_value(stored_msg, PCMK__XA_CRM_TASK);
 
     /* Optimize this for the DC - it has the most to do */
 
     crm_log_xml_trace(stored_msg, "request");
     if (op == NULL) {
-        crm_warn("Ignoring request without " F_CRM_TASK);
+        crm_warn("Ignoring request without " PCMK__XA_CRM_TASK);
         return I_NULL;
     }
 
     if (strcmp(op, CRM_OP_SHUTDOWN_REQ) == 0) {
-        const char *from = crm_element_value(stored_msg, F_CRM_HOST_FROM);
-        crm_node_t *node = pcmk__search_cluster_node_cache(0, from, NULL);
+        const char *from = crm_element_value(stored_msg, PCMK__XA_SRC);
+        crm_node_t *node =
+            pcmk__search_node_caches(0, from, pcmk__node_search_cluster_member);
 
         pcmk__update_peer_expected(__func__, node, CRMD_JOINSTATE_DOWN);
         if(AM_I_DC == FALSE) {
@@ -1099,11 +1117,13 @@ handle_request(xmlNode *stored_msg, enum crmd_fsa_cause cause)
 
     } else if (strcmp(op, CRM_OP_JOIN_OFFER) == 0) {
         verify_feature_set(stored_msg);
-        crm_debug("Raising I_JOIN_OFFER: join-%s", crm_element_value(stored_msg, F_CRM_JOIN_ID));
+        crm_debug("Raising I_JOIN_OFFER: join-%s",
+                  crm_element_value(stored_msg, PCMK__XA_JOIN_ID));
         return I_JOIN_OFFER;
 
     } else if (strcmp(op, CRM_OP_JOIN_ACKNAK) == 0) {
-        crm_debug("Raising I_JOIN_RESULT: join-%s", crm_element_value(stored_msg, F_CRM_JOIN_ID));
+        crm_debug("Raising I_JOIN_RESULT: join-%s",
+                  crm_element_value(stored_msg, PCMK__XA_JOIN_ID));
         return I_JOIN_RESULT;
 
     } else if (strcmp(op, CRM_OP_LRM_DELETE) == 0) {
@@ -1113,18 +1133,12 @@ handle_request(xmlNode *stored_msg, enum crmd_fsa_cause cause)
                || (strcmp(op, CRM_OP_LRM_REFRESH) == 0) // @COMPAT
                || (strcmp(op, CRM_OP_REPROBE) == 0)) {
 
-        crm_xml_add(stored_msg, F_CRM_SYS_TO, CRM_SYSTEM_LRMD);
+        crm_xml_add(stored_msg, PCMK__XA_CRM_SYS_TO, CRM_SYSTEM_LRMD);
         return I_ROUTER;
 
     } else if (strcmp(op, CRM_OP_NOOP) == 0) {
         return I_NULL;
 
-    } else if (strcmp(op, CRM_OP_LOCAL_SHUTDOWN) == 0) {
-
-        crm_shutdown(SIGTERM);
-        /*return I_SHUTDOWN; */
-        return I_NULL;
-
     } else if (strcmp(op, CRM_OP_PING) == 0) {
         return handle_ping(stored_msg);
 
@@ -1135,12 +1149,12 @@ handle_request(xmlNode *stored_msg, enum crmd_fsa_cause cause)
         int id = 0;
         const char *name = NULL;
 
-        crm_element_value_int(stored_msg, XML_ATTR_ID, &id);
-        name = crm_element_value(stored_msg, XML_ATTR_UNAME);
+        crm_element_value_int(stored_msg, PCMK_XA_ID, &id);
+        name = crm_element_value(stored_msg, PCMK_XA_UNAME);
 
         if(cause == C_IPC_MESSAGE) {
             msg = create_request(CRM_OP_RM_NODE_CACHE, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL);
-            if (send_cluster_message(NULL, crm_msg_crmd, msg, TRUE) == FALSE) {
+            if (!pcmk__cluster_send_message(NULL, crm_msg_crmd, msg)) {
                 crm_err("Could not instruct peers to remove references to node %s/%u", name, id);
             } else {
                 crm_notice("Instructing peers to remove references to node %s/%u", name, id);
@@ -1148,7 +1162,7 @@ handle_request(xmlNode *stored_msg, enum crmd_fsa_cause cause)
             free_xml(msg);
 
         } else {
-            reap_crm_member(id, name);
+            pcmk__cluster_forget_cluster_node(id, name);
 
             /* If we're forgetting this node, also forget any failures to fence
              * it, so we don't carry that over to any node added later with the
@@ -1158,7 +1172,9 @@ handle_request(xmlNode *stored_msg, enum crmd_fsa_cause cause)
         }
 
     } else if (strcmp(op, CRM_OP_MAINTENANCE_NODES) == 0) {
-        xmlNode *xml = get_message_xml(stored_msg, F_CRM_DATA);
+        xmlNode *wrapper = pcmk__xe_first_child(stored_msg, PCMK__XE_CRM_XML,
+                                                NULL, NULL);
+        xmlNode *xml = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
         remote_ra_process_maintenance_nodes(xml);
 
@@ -1183,15 +1199,15 @@ handle_request(xmlNode *stored_msg, enum crmd_fsa_cause cause)
 static void
 handle_response(xmlNode *stored_msg)
 {
-    const char *op = crm_element_value(stored_msg, F_CRM_TASK);
+    const char *op = crm_element_value(stored_msg, PCMK__XA_CRM_TASK);
 
     crm_log_xml_trace(stored_msg, "reply");
     if (op == NULL) {
-        crm_warn("Ignoring reply without " F_CRM_TASK);
+        crm_warn("Ignoring reply without " PCMK__XA_CRM_TASK);
 
     } else if (AM_I_DC && strcmp(op, CRM_OP_PECALC) == 0) {
         // Check whether scheduler answer been superseded by subsequent request
-        const char *msg_ref = crm_element_value(stored_msg, XML_ATTR_REFERENCE);
+        const char *msg_ref = crm_element_value(stored_msg, PCMK_XA_REFERENCE);
 
         if (msg_ref == NULL) {
             crm_err("%s - Ignoring calculation with no reference", op);
@@ -1212,7 +1228,7 @@ handle_response(xmlNode *stored_msg)
                || strcmp(op, CRM_OP_SHUTDOWN_REQ) == 0 || strcmp(op, CRM_OP_SHUTDOWN) == 0) {
 
     } else {
-        const char *host_from = crm_element_value(stored_msg, F_CRM_HOST_FROM);
+        const char *host_from = crm_element_value(stored_msg, PCMK__XA_SRC);
 
         crm_err("Unexpected response (op=%s, src=%s) sent to the %s",
                 op, host_from, AM_I_DC ? "DC" : "controller");
@@ -1230,7 +1246,7 @@ handle_shutdown_request(xmlNode * stored_msg)
      */
 
     char *now_s = NULL;
-    const char *host_from = crm_element_value(stored_msg, F_CRM_HOST_FROM);
+    const char *host_from = crm_element_value(stored_msg, PCMK__XA_SRC);
 
     if (host_from == NULL) {
         /* we're shutting down and the DC */
@@ -1242,7 +1258,7 @@ handle_shutdown_request(xmlNode * stored_msg)
     crm_log_xml_trace(stored_msg, "message");
 
     now_s = pcmk__ttoa(time(NULL));
-    update_attrd(host_from, XML_CIB_ATTR_SHUTDOWN, now_s, NULL, FALSE);
+    update_attrd(host_from, PCMK__NODE_ATTR_SHUTDOWN, now_s, NULL, FALSE);
     free(now_s);
 
     /* will be picked up by the TE as long as its running */
@@ -1258,8 +1274,8 @@ send_msg_via_ipc(xmlNode * msg, const char *sys)
 
     client_channel = pcmk__find_client_by_id(sys);
 
-    if (crm_element_value(msg, F_CRM_HOST_FROM) == NULL) {
-        crm_xml_add(msg, F_CRM_HOST_FROM, controld_globals.our_nodename);
+    if (crm_element_value(msg, PCMK__XA_SRC) == NULL) {
+        crm_xml_add(msg, PCMK__XA_SRC, controld_globals.our_nodename);
     }
 
     if (client_channel != NULL) {
@@ -1267,16 +1283,21 @@ send_msg_via_ipc(xmlNode * msg, const char *sys)
         pcmk__ipc_send_xml(client_channel, 0, msg, crm_ipc_server_event);
 
     } else if (pcmk__str_eq(sys, CRM_SYSTEM_TENGINE, pcmk__str_none)) {
-        xmlNode *data = get_message_xml(msg, F_CRM_DATA);
+        xmlNode *wrapper = pcmk__xe_first_child(msg, PCMK__XE_CRM_XML, NULL,
+                                                NULL);
+        xmlNode *data = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
         process_te_message(msg, data);
 
     } else if (pcmk__str_eq(sys, CRM_SYSTEM_LRMD, pcmk__str_none)) {
         fsa_data_t fsa_data;
         ha_msg_input_t fsa_input;
+        xmlNode *wrapper = NULL;
 
         fsa_input.msg = msg;
-        fsa_input.xml = get_message_xml(msg, F_CRM_DATA);
+
+        wrapper = pcmk__xe_first_child(msg, PCMK__XE_CRM_XML, NULL, NULL);
+        fsa_input.xml = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
         fsa_data.id = 0;
         fsa_data.actions = 0;
@@ -1323,14 +1344,15 @@ broadcast_remote_state_message(const char *node_name, bool node_up)
     crm_info("Notifying cluster of Pacemaker Remote node %s %s",
              node_name, node_up? "coming up" : "going down");
 
-    crm_xml_add(msg, XML_ATTR_ID, node_name);
+    crm_xml_add(msg, PCMK_XA_ID, node_name);
     pcmk__xe_set_bool_attr(msg, PCMK__XA_IN_CCM, node_up);
 
     if (node_up) {
-        crm_xml_add(msg, PCMK__XA_CONN_HOST, controld_globals.our_nodename);
+        crm_xml_add(msg, PCMK__XA_CONNECTION_HOST,
+                    controld_globals.our_nodename);
     }
 
-    send_cluster_message(NULL, crm_msg_crmd, msg, TRUE);
+    pcmk__cluster_send_message(NULL, crm_msg_crmd, msg);
     free_xml(msg);
 }
 
diff --git a/daemons/controld/controld_metadata.c b/daemons/controld/controld_metadata.c
index c813ceb..37df38c 100644
--- a/daemons/controld/controld_metadata.c
+++ b/daemons/controld/controld_metadata.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2023 the Pacemaker project contributors
+ * Copyright 2017-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -70,25 +70,18 @@ metadata_cache_reset(GHashTable *mdc)
 static struct ra_param_s *
 ra_param_from_xml(xmlNode *param_xml)
 {
-    const char *param_name = crm_element_value(param_xml, "name");
+    const char *param_name = crm_element_value(param_xml, PCMK_XA_NAME);
     struct ra_param_s *p;
 
-    p = calloc(1, sizeof(struct ra_param_s));
-    if (p == NULL) {
-        return NULL;
-    }
+    p = pcmk__assert_alloc(1, sizeof(struct ra_param_s));
 
-    p->rap_name = strdup(param_name);
-    if (p->rap_name == NULL) {
-        free(p);
-        return NULL;
-    }
+    p->rap_name = pcmk__str_copy(param_name);
 
-    if (pcmk__xe_attr_is_true(param_xml, "reloadable")) {
+    if (pcmk__xe_attr_is_true(param_xml, PCMK_XA_RELOADABLE)) {
         controld_set_ra_param_flags(p, ra_param_reloadable);
     }
 
-    if (pcmk__xe_attr_is_true(param_xml, "unique")) {
+    if (pcmk__xe_attr_is_true(param_xml, PCMK_XA_UNIQUE)) {
         controld_set_ra_param_flags(p, ra_param_unique);
     }
 
@@ -139,21 +132,19 @@ controld_cache_metadata(GHashTable *mdc, const lrmd_rsc_info_t *rsc,
         goto err;
     }
 
-    metadata = string2xml(metadata_str);
+    metadata = pcmk__xml_parse(metadata_str);
     if (!metadata) {
         reason = "Metadata is not valid XML";
         goto err;
     }
 
-    md = calloc(1, sizeof(struct ra_metadata_s));
-    if (md == NULL) {
-        reason = "Could not allocate memory";
-        goto err;
-    }
+    md = pcmk__assert_alloc(1, sizeof(struct ra_metadata_s));
 
     if (strcmp(rsc->standard, PCMK_RESOURCE_CLASS_OCF) == 0) {
         xmlChar *content = NULL;
-        xmlNode *version_element = first_named_child(metadata, "version");
+        xmlNode *version_element = pcmk__xe_first_child(metadata,
+                                                        PCMK_XE_VERSION, NULL,
+                                                        NULL);
 
         if (version_element != NULL) {
             content = xmlNodeGetContent(version_element);
@@ -166,11 +157,11 @@ controld_cache_metadata(GHashTable *mdc, const lrmd_rsc_info_t *rsc,
     }
 
     // Check supported actions
-    match = first_named_child(metadata, "actions");
-    for (match = first_named_child(match, "action"); match != NULL;
-         match = crm_next_same_xml(match)) {
+    match = pcmk__xe_first_child(metadata, PCMK_XE_ACTIONS, NULL, NULL);
+    for (match = pcmk__xe_first_child(match, PCMK_XE_ACTION, NULL, NULL);
+         match != NULL; match = pcmk__xe_next_same(match)) {
 
-        const char *action_name = crm_element_value(match, "name");
+        const char *action_name = crm_element_value(match, PCMK_XA_NAME);
 
         if (pcmk__str_eq(action_name, PCMK_ACTION_RELOAD_AGENT,
                          pcmk__str_none)) {
@@ -188,15 +179,15 @@ controld_cache_metadata(GHashTable *mdc, const lrmd_rsc_info_t *rsc,
     }
 
     // Build a parameter list
-    match = first_named_child(metadata, "parameters");
-    for (match = first_named_child(match, "parameter"); match != NULL;
-         match = crm_next_same_xml(match)) {
+    match = pcmk__xe_first_child(metadata, PCMK_XE_PARAMETERS, NULL, NULL);
+    for (match = pcmk__xe_first_child(match, PCMK_XE_PARAMETER, NULL, NULL);
+         match != NULL; match = pcmk__xe_next_same(match)) {
 
-        const char *param_name = crm_element_value(match, "name");
+        const char *param_name = crm_element_value(match, PCMK_XA_NAME);
 
         if (param_name == NULL) {
-            crm_warn("Metadata for %s:%s:%s has parameter without a name",
-                     rsc->standard, rsc->provider, rsc->type);
+            crm_warn("Metadata for %s:%s:%s has parameter without a "
+                     PCMK_XA_NAME, rsc->standard, rsc->provider, rsc->type);
         } else {
             struct ra_param_s *p = ra_param_from_xml(match);
 
diff --git a/daemons/controld/controld_remote_ra.c b/daemons/controld/controld_remote_ra.c
index d692ef6..4bbf80c 100644
--- a/daemons/controld/controld_remote_ra.c
+++ b/daemons/controld/controld_remote_ra.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2023 the Pacemaker project contributors
+ * Copyright 2013-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -10,7 +10,7 @@
 #include <crm_internal.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 #include <crm/common/xml_internal.h>
 #include <crm/lrmd.h>
 #include <crm/lrmd_internal.h>
@@ -206,7 +206,8 @@ should_purge_attributes(crm_node_t *node)
     /* Get the node that was hosting the remote connection resource from the
      * peer cache.  That's the one we really care about here.
      */
-    conn_node = crm_get_peer(0, node->conn_host);
+    conn_node = pcmk__get_node(0, node->conn_host, NULL,
+                               pcmk__node_search_cluster_member);
     if (conn_node == NULL) {
         return purge;
     }
@@ -296,7 +297,7 @@ remote_node_up(const char *node_name)
     update_attrd(node_name, CRM_OP_PROBED, NULL, NULL, TRUE);
 
     /* Ensure node is in the remote peer cache with member status */
-    node = crm_remote_peer_get(node_name);
+    node = pcmk__cluster_lookup_remote_node(node_name);
     CRM_CHECK(node != NULL, return);
 
     purge_remote_node_attrs(call_opt, node);
@@ -324,24 +325,24 @@ remote_node_up(const char *node_name)
      */
     broadcast_remote_state_message(node_name, true);
 
-    update = create_xml_node(NULL, XML_CIB_TAG_STATUS);
+    update = pcmk__xe_create(NULL, PCMK_XE_STATUS);
     state = create_node_state_update(node, node_update_cluster, update,
                                      __func__);
 
-    /* Clear the XML_NODE_IS_FENCED flag in the node state. If the node ever
+    /* Clear the PCMK__XA_NODE_FENCED flag in the node state. If the node ever
      * needs to be fenced, this flag will allow various actions to determine
      * whether the fencing has happened yet.
      */
-    crm_xml_add(state, XML_NODE_IS_FENCED, "0");
+    crm_xml_add(state, PCMK__XA_NODE_FENCED, "0");
 
     /* TODO: If the remote connection drops, and this (async) CIB update either
      * failed or has not yet completed, later actions could mistakenly think the
-     * node has already been fenced (if the XML_NODE_IS_FENCED attribute was
+     * node has already been fenced (if the PCMK__XA_NODE_FENCED attribute was
      * previously set, because it won't have been cleared). This could prevent
      * actual fencing or allow recurring monitor failures to be cleared too
      * soon. Ideally, we wouldn't rely on the CIB for the fenced status.
      */
-    controld_update_cib(XML_CIB_TAG_STATUS, update, call_opt, NULL);
+    controld_update_cib(PCMK_XE_STATUS, update, call_opt, NULL);
     free_xml(update);
 }
 
@@ -379,7 +380,7 @@ remote_node_down(const char *node_name, const enum down_opts opts)
     }
 
     /* Ensure node is in the remote peer cache with lost state */
-    node = crm_remote_peer_get(node_name);
+    node = pcmk__cluster_lookup_remote_node(node_name);
     CRM_CHECK(node != NULL, return);
     pcmk__update_peer_state(__func__, node, CRM_NODE_LOST, 0);
 
@@ -387,9 +388,9 @@ remote_node_down(const char *node_name, const enum down_opts opts)
     broadcast_remote_state_message(node_name, false);
 
     /* Update CIB node state */
-    update = create_xml_node(NULL, XML_CIB_TAG_STATUS);
+    update = pcmk__xe_create(NULL, PCMK_XE_STATUS);
     create_node_state_update(node, node_update_cluster, update, __func__);
-    controld_update_cib(XML_CIB_TAG_STATUS, update, call_opt, NULL);
+    controld_update_cib(PCMK_XE_STATUS, update, call_opt, NULL);
     free_xml(update);
 }
 
@@ -419,7 +420,7 @@ check_remote_node_state(const remote_ra_cmd_t *cmd)
          * it hasn't been tracking the remote node, and other code relies on
          * the cache to distinguish remote nodes from unseen cluster nodes.
          */
-        crm_node_t *node = crm_remote_peer_get(cmd->rsc_id);
+        crm_node_t *node = pcmk__cluster_lookup_remote_node(cmd->rsc_id);
 
         CRM_CHECK(node != NULL, return);
         pcmk__update_peer_state(__func__, node, CRM_NODE_MEMBER, 0);
@@ -437,7 +438,7 @@ check_remote_node_state(const remote_ra_cmd_t *cmd)
                  * so if the connection migrated elsewhere and we aren't DC,
                  * un-cache the node, so we don't have stale info
                  */
-                crm_remote_peer_cache_remove(cmd->rsc_id);
+                pcmk__cluster_forget_remote_node(cmd->rsc_id);
             }
         }
     }
@@ -493,7 +494,7 @@ report_remote_ra_result(remote_ra_cmd_t * cmd)
 
         op.params = pcmk__strkey_table(free, free);
         for (tmp = cmd->params; tmp; tmp = tmp->next) {
-            g_hash_table_insert(op.params, strdup(tmp->key), strdup(tmp->value));
+            pcmk__insert_dup(op.params, tmp->key, tmp->value);
         }
 
     }
@@ -861,12 +862,17 @@ handle_remote_ra_start(lrm_state_t * lrm_state, remote_ra_cmd_t * cmd, int timeo
     int rc = pcmk_rc_ok;
 
     for (tmp = cmd->params; tmp; tmp = tmp->next) {
-        if (pcmk__strcase_any_of(tmp->key, XML_RSC_ATTR_REMOTE_RA_ADDR,
-                                 XML_RSC_ATTR_REMOTE_RA_SERVER, NULL)) {
+        if (pcmk__strcase_any_of(tmp->key,
+                                 PCMK_REMOTE_RA_ADDR, PCMK_REMOTE_RA_SERVER,
+                                 NULL)) {
             server = tmp->value;
-        } else if (pcmk__str_eq(tmp->key, XML_RSC_ATTR_REMOTE_RA_PORT, pcmk__str_casei)) {
+
+        } else if (pcmk__str_eq(tmp->key, PCMK_REMOTE_RA_PORT,
+                                pcmk__str_none)) {
             port = atoi(tmp->value);
-        } else if (pcmk__str_eq(tmp->key, CRM_META "_" XML_RSC_ATTR_CONTAINER, pcmk__str_casei)) {
+
+        } else if (pcmk__str_eq(tmp->key, CRM_META "_" PCMK__META_CONTAINER,
+                                pcmk__str_none)) {
             lrm_remote_set_flags(lrm_state, controlling_guest);
         }
     }
@@ -967,9 +973,9 @@ handle_remote_ra_exec(gpointer user_data)
 
         } else if (pcmk__str_any_of(cmd->action, PCMK_ACTION_RELOAD,
                                     PCMK_ACTION_RELOAD_AGENT, NULL))  {
-            /* Currently the only reloadable parameter is reconnect_interval,
-             * which is only used by the scheduler via the CIB, so reloads are a
-             * no-op.
+            /* Currently the only reloadable parameter is
+             * PCMK_REMOTE_RA_RECONNECT_INTERVAL, which is only used by the
+             * scheduler via the CIB, so reloads are a no-op.
              *
              * @COMPAT DC <2.1.0: We only need to check for "reload" in case
              * we're in a rolling upgrade with a DC scheduling "reload" instead
@@ -995,7 +1001,7 @@ remote_ra_data_init(lrm_state_t * lrm_state)
         return;
     }
 
-    ra_data = calloc(1, sizeof(remote_ra_data_t));
+    ra_data = pcmk__assert_alloc(1, sizeof(remote_ra_data_t));
     ra_data->work = mainloop_add_trigger(G_PRIORITY_HIGH, handle_remote_ra_exec, lrm_state);
     lrm_state->remote_ra_data = ra_data;
 }
@@ -1041,12 +1047,12 @@ remote_ra_get_rsc_info(lrm_state_t * lrm_state, const char *rsc_id)
     lrmd_rsc_info_t *info = NULL;
 
     if ((lrm_state_find(rsc_id))) {
-        info = calloc(1, sizeof(lrmd_rsc_info_t));
+        info = pcmk__assert_alloc(1, sizeof(lrmd_rsc_info_t));
 
-        info->id = strdup(rsc_id);
-        info->type = strdup(REMOTE_LRMD_RA);
-        info->standard = strdup(PCMK_RESOURCE_CLASS_OCF);
-        info->provider = strdup("pacemaker");
+        info->id = pcmk__str_copy(rsc_id);
+        info->type = pcmk__str_copy(REMOTE_LRMD_RA);
+        info->standard = pcmk__str_copy(PCMK_RESOURCE_CLASS_OCF);
+        info->provider = pcmk__str_copy("pacemaker");
     }
 
     return info;
@@ -1202,7 +1208,7 @@ handle_dup:
     /* update the userdata */
     if (userdata) {
        free(cmd->userdata);
-       cmd->userdata = strdup(userdata);
+       cmd->userdata = pcmk__str_copy(userdata);
     }
 
     /* if we've already reported success, generate a new call id */
@@ -1280,23 +1286,12 @@ controld_execute_remote_agent(const lrm_state_t *lrm_state, const char *rsc_id,
         return pcmk_rc_ok;
     }
 
-    cmd = calloc(1, sizeof(remote_ra_cmd_t));
-    if (cmd == NULL) {
-        lrmd_key_value_freeall(params);
-        return ENOMEM;
-    }
-
-    cmd->owner = strdup(lrm_state->node_name);
-    cmd->rsc_id = strdup(rsc_id);
-    cmd->action = strdup(action);
-    cmd->userdata = strdup(userdata);
-    if ((cmd->owner == NULL) || (cmd->rsc_id == NULL) || (cmd->action == NULL)
-        || (cmd->userdata == NULL)) {
-        free_cmd(cmd);
-        lrmd_key_value_freeall(params);
-        return ENOMEM;
-    }
+    cmd = pcmk__assert_alloc(1, sizeof(remote_ra_cmd_t));
 
+    cmd->owner = pcmk__str_copy(lrm_state->node_name);
+    cmd->rsc_id = pcmk__str_copy(rsc_id);
+    cmd->action = pcmk__str_copy(action);
+    cmd->userdata = pcmk__str_copy(userdata);
     cmd->interval_ms = interval_ms;
     cmd->timeout = timeout_ms;
     cmd->start_delay = start_delay_ms;
@@ -1347,9 +1342,8 @@ remote_ra_fail(const char *node_name)
  *     </downed>
  *  </pseudo_event>
  */
-#define XPATH_PSEUDO_FENCE "/" XML_GRAPH_TAG_PSEUDO_EVENT \
-    "[@" XML_LRM_ATTR_TASK "='stonith']/" XML_GRAPH_TAG_DOWNED \
-    "/" XML_CIB_TAG_NODE
+#define XPATH_PSEUDO_FENCE "/" PCMK__XE_PSEUDO_EVENT \
+    "[@" PCMK_XA_OPERATION "='stonith']/" PCMK__XE_DOWNED "/" PCMK_XE_NODE
 
 /*!
  * \internal
@@ -1380,7 +1374,7 @@ remote_ra_process_pseudo(xmlNode *xml)
          * recovered.
          */
         if (result) {
-            const char *remote = ID(result);
+            const char *remote = pcmk__xe_id(result);
 
             if (remote) {
                 remote_node_down(remote, DOWN_ERASE_LRM);
@@ -1398,13 +1392,13 @@ remote_ra_maintenance(lrm_state_t * lrm_state, gboolean maintenance)
     crm_node_t *node;
 
     call_opt = crmd_cib_smart_opt();
-    node = crm_remote_peer_get(lrm_state->node_name);
+    node = pcmk__cluster_lookup_remote_node(lrm_state->node_name);
     CRM_CHECK(node != NULL, return);
-    update = create_xml_node(NULL, XML_CIB_TAG_STATUS);
+    update = pcmk__xe_create(NULL, PCMK_XE_STATUS);
     state = create_node_state_update(node, node_update_none, update,
                                      __func__);
-    crm_xml_add(state, XML_NODE_IS_MAINTENANCE, maintenance?"1":"0");
-    if (controld_update_cib(XML_CIB_TAG_STATUS, update, call_opt,
+    crm_xml_add(state, PCMK__XA_NODE_IN_MAINTENANCE, (maintenance? "1" : "0"));
+    if (controld_update_cib(PCMK_XE_STATUS, update, call_opt,
                             NULL) == pcmk_rc_ok) {
         /* TODO: still not 100% sure that async update will succeed ... */
         if (maintenance) {
@@ -1416,9 +1410,9 @@ remote_ra_maintenance(lrm_state_t * lrm_state, gboolean maintenance)
     free_xml(update);
 }
 
-#define XPATH_PSEUDO_MAINTENANCE "//" XML_GRAPH_TAG_PSEUDO_EVENT \
-    "[@" XML_LRM_ATTR_TASK "='" PCMK_ACTION_MAINTENANCE_NODES "']/" \
-    XML_GRAPH_TAG_MAINTENANCE
+#define XPATH_PSEUDO_MAINTENANCE "//" PCMK__XE_PSEUDO_EVENT         \
+    "[@" PCMK_XA_OPERATION "='" PCMK_ACTION_MAINTENANCE_NODES "']/" \
+    PCMK__XE_MAINTENANCE
 
 /*!
  * \internal
@@ -1435,25 +1429,29 @@ remote_ra_process_maintenance_nodes(xmlNode *xml)
         xmlNode *node;
         int cnt = 0, cnt_remote = 0;
 
-        for (node = first_named_child(getXpathResult(search, 0),
-                                      XML_CIB_TAG_NODE);
-             node != NULL; node = crm_next_same_xml(node)) {
+        for (node = pcmk__xe_first_child(getXpathResult(search, 0),
+                                         PCMK_XE_NODE, NULL, NULL);
+             node != NULL; node = pcmk__xe_next_same(node)) {
 
-            lrm_state_t *lrm_state = lrm_state_find(ID(node));
+            lrm_state_t *lrm_state = lrm_state_find(pcmk__xe_id(node));
 
             cnt++;
             if (lrm_state && lrm_state->remote_ra_data &&
                 pcmk_is_set(((remote_ra_data_t *) lrm_state->remote_ra_data)->status, remote_active)) {
-                int is_maint;
+
+                const char *in_maint_s = NULL;
+                int in_maint;
 
                 cnt_remote++;
-                pcmk__scan_min_int(crm_element_value(node, XML_NODE_IS_MAINTENANCE),
-                                   &is_maint, 0);
-                remote_ra_maintenance(lrm_state, is_maint);
+                in_maint_s = crm_element_value(node,
+                                               PCMK__XA_NODE_IN_MAINTENANCE);
+                pcmk__scan_min_int(in_maint_s, &in_maint, 0);
+                remote_ra_maintenance(lrm_state, in_maint);
             }
         }
-        crm_trace("Action holds %d nodes (%d remotes found) "
-                    "adjusting maintenance-mode", cnt, cnt_remote);
+        crm_trace("Action holds %d nodes (%d remotes found) adjusting "
+                  PCMK_OPT_MAINTENANCE_MODE,
+                  cnt, cnt_remote);
     }
     freeXpathObject(search);
 }
diff --git a/daemons/controld/controld_schedulerd.c b/daemons/controld/controld_schedulerd.c
index 8aca83f..3081304 100644
--- a/daemons/controld/controld_schedulerd.c
+++ b/daemons/controld/controld_schedulerd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -15,7 +15,6 @@
 #include <crm/cluster.h>
 #include <crm/common/xml.h>
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml_internal.h>
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_schedulerd.h>
@@ -65,7 +64,7 @@ save_cib_contents(xmlNode *msg, int call_id, int rc, xmlNode *output,
     if (rc == pcmk_ok) {
         char *filename = crm_strdup_printf(PE_STATE_DIR "/pe-core-%s.bz2", id);
 
-        if (write_xml_file(output, filename, TRUE) < 0) {
+        if (pcmk__xml_write_file(output, filename, true, NULL) != pcmk_rc_ok) {
             crm_err("Could not save Cluster Information Base to %s after scheduler crash",
                     filename);
         } else {
@@ -144,12 +143,13 @@ handle_reply(pcmk_schedulerd_api_reply_t *reply)
          *
          * The name of the top level element here is irrelevant.  Nothing checks it.
          */
-        fsa_input.msg = create_xml_node(NULL, "dummy-reply");
-        crm_xml_add(fsa_input.msg, XML_ATTR_REFERENCE, msg_ref);
-        crm_xml_add(fsa_input.msg, F_CRM_TGRAPH_INPUT, reply->data.graph.input);
+        fsa_input.msg = pcmk__xe_create(NULL, "dummy-reply");
+        crm_xml_add(fsa_input.msg, PCMK_XA_REFERENCE, msg_ref);
+        crm_xml_add(fsa_input.msg, PCMK__XA_CRM_TGRAPH_IN,
+                    reply->data.graph.input);
 
-        crm_data_node = create_xml_node(fsa_input.msg, F_CRM_DATA);
-        add_node_copy(crm_data_node, reply->data.graph.tgraph);
+        crm_data_node = pcmk__xe_create(fsa_input.msg, PCMK__XE_CRM_XML);
+        pcmk__xml_copy(crm_data_node, reply->data.graph.tgraph);
         register_fsa_input_later(C_IPC_MESSAGE, I_PE_SUCCESS, &fsa_input);
 
         free_xml(fsa_input.msg);
@@ -378,14 +378,14 @@ force_local_option(xmlNode *xml, const char *attr_name, const char *attr_value)
     char *xpath_string = NULL;
     xmlXPathObjectPtr xpathObj = NULL;
 
-    xpath_base = pcmk_cib_xpath_for(XML_CIB_TAG_CRMCONFIG);
+    xpath_base = pcmk_cib_xpath_for(PCMK_XE_CRM_CONFIG);
     if (xpath_base == NULL) {
-        crm_err(XML_CIB_TAG_CRMCONFIG " CIB element not known (bug?)");
+        crm_err(PCMK_XE_CRM_CONFIG " CIB element not known (bug?)");
         return;
     }
 
     xpath_string = crm_strdup_printf("%s//%s//nvpair[@name='%s']",
-                                     xpath_base, XML_CIB_TAG_PROPSET,
+                                     xpath_base, PCMK_XE_CLUSTER_PROPERTY_SET,
                                      attr_name);
     xpathObj = xpath_search(xml, xpath_string);
     max = numXpathResults(xpathObj);
@@ -393,8 +393,9 @@ force_local_option(xmlNode *xml, const char *attr_name, const char *attr_value)
 
     for (lpc = 0; lpc < max; lpc++) {
         xmlNode *match = getXpathResult(xpathObj, lpc);
-        crm_trace("Forcing %s/%s = %s", ID(match), attr_name, attr_value);
-        crm_xml_add(match, XML_NVPAIR_ATTR_VALUE, attr_value);
+        crm_trace("Forcing %s/%s = %s",
+                  pcmk__xe_id(match), attr_name, attr_value);
+        crm_xml_add(match, PCMK_XA_VALUE, attr_value);
     }
 
     if(max == 0) {
@@ -403,32 +404,37 @@ force_local_option(xmlNode *xml, const char *attr_name, const char *attr_value)
         xmlNode *cluster_property_set = NULL;
 
         crm_trace("Creating %s-%s for %s=%s",
-                  CIB_OPTIONS_FIRST, attr_name, attr_name, attr_value);
+                  PCMK_VALUE_CIB_BOOTSTRAP_OPTIONS, attr_name, attr_name,
+                  attr_value);
 
-        configuration = pcmk__xe_match(xml, XML_CIB_TAG_CONFIGURATION, NULL,
-                                       NULL);
+        configuration = pcmk__xe_first_child(xml, PCMK_XE_CONFIGURATION, NULL,
+                                             NULL);
         if (configuration == NULL) {
-            configuration = create_xml_node(xml, XML_CIB_TAG_CONFIGURATION);
+            configuration = pcmk__xe_create(xml, PCMK_XE_CONFIGURATION);
         }
 
-        crm_config = pcmk__xe_match(configuration, XML_CIB_TAG_CRMCONFIG, NULL,
-                                    NULL);
+        crm_config = pcmk__xe_first_child(configuration, PCMK_XE_CRM_CONFIG,
+                                          NULL, NULL);
         if (crm_config == NULL) {
-            crm_config = create_xml_node(configuration, XML_CIB_TAG_CRMCONFIG);
+            crm_config = pcmk__xe_create(configuration, PCMK_XE_CRM_CONFIG);
         }
 
-        cluster_property_set = pcmk__xe_match(crm_config, XML_CIB_TAG_PROPSET,
-                                              NULL, NULL);
+        cluster_property_set =
+            pcmk__xe_first_child(crm_config, PCMK_XE_CLUSTER_PROPERTY_SET, NULL,
+                                 NULL);
         if (cluster_property_set == NULL) {
-            cluster_property_set = create_xml_node(crm_config, XML_CIB_TAG_PROPSET);
-            crm_xml_add(cluster_property_set, XML_ATTR_ID, CIB_OPTIONS_FIRST);
+            cluster_property_set =
+                pcmk__xe_create(crm_config, PCMK_XE_CLUSTER_PROPERTY_SET);
+            crm_xml_add(cluster_property_set, PCMK_XA_ID,
+                        PCMK_VALUE_CIB_BOOTSTRAP_OPTIONS);
         }
 
-        xml = create_xml_node(cluster_property_set, XML_CIB_TAG_NVPAIR);
+        xml = pcmk__xe_create(cluster_property_set, PCMK_XE_NVPAIR);
 
-        crm_xml_set_id(xml, "%s-%s", CIB_OPTIONS_FIRST, attr_name);
-        crm_xml_add(xml, XML_NVPAIR_ATTR_NAME, attr_name);
-        crm_xml_add(xml, XML_NVPAIR_ATTR_VALUE, attr_value);
+        crm_xml_set_id(xml, "%s-%s",
+                       PCMK_VALUE_CIB_BOOTSTRAP_OPTIONS, attr_name);
+        crm_xml_add(xml, PCMK_XA_NAME, attr_name);
+        crm_xml_add(xml, PCMK_XA_VALUE, attr_value);
     }
     freeXpathObject(xpathObj);
 }
@@ -476,16 +482,16 @@ do_pe_invoke_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void
      * scheduler is invoked */
     pcmk__refresh_node_caches_from_cib(output);
 
-    crm_xml_add(output, XML_ATTR_DC_UUID, controld_globals.our_uuid);
-    pcmk__xe_set_bool_attr(output, XML_ATTR_HAVE_QUORUM,
+    crm_xml_add(output, PCMK_XA_DC_UUID, controld_globals.our_uuid);
+    pcmk__xe_set_bool_attr(output, PCMK_XA_HAVE_QUORUM,
                            pcmk_is_set(controld_globals.flags,
                                        controld_has_quorum));
 
-    force_local_option(output, XML_ATTR_HAVE_WATCHDOG, pcmk__btoa(watchdog));
+    force_local_option(output, PCMK_OPT_HAVE_WATCHDOG, pcmk__btoa(watchdog));
 
     if (pcmk_is_set(controld_globals.flags, controld_ever_had_quorum)
         && !crm_have_quorum) {
-        crm_xml_add_int(output, XML_ATTR_QUORUM_PANIC, 1);
+        crm_xml_add_int(output, PCMK_XA_NO_QUORUM_PANIC, 1);
     }
 
     rc = pcmk_rc2legacy(pcmk_schedulerd_api_graph(schedulerd_api, output, &ref));
@@ -498,8 +504,8 @@ do_pe_invoke_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void
         CRM_ASSERT(ref != NULL);
         controld_expect_sched_reply(ref);
         crm_debug("Invoking the scheduler: query=%d, ref=%s, seq=%llu, "
-                  "quorate=%s", fsa_pe_query, controld_globals.fsa_pe_ref,
-                  crm_peer_seq, pcmk__btoa(pcmk_is_set(controld_globals.flags,
-                                                       controld_has_quorum)));
+                  "quorate=%s",
+                  fsa_pe_query, controld_globals.fsa_pe_ref, crm_peer_seq,
+                  pcmk__flag_text(controld_globals.flags, controld_has_quorum));
     }
 }
diff --git a/daemons/controld/controld_te_actions.c b/daemons/controld/controld_te_actions.c
index fe6b744..a4c99fc 100644
--- a/daemons/controld/controld_te_actions.c
+++ b/daemons/controld/controld_te_actions.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -13,7 +13,6 @@
 #include <crm/crm.h>
 #include <crm/cib.h>
 #include <crm/lrmd.h>               // lrmd_event_data_t, lrmd_free_event()
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 #include <crm/cluster.h>
 
@@ -44,7 +43,7 @@ te_start_action_timer(const pcmk__graph_t *graph, pcmk__graph_action_t *action)
 static int
 execute_pseudo_action(pcmk__graph_t *graph, pcmk__graph_action_t *pseudo)
 {
-    const char *task = crm_element_value(pseudo->xml, XML_LRM_ATTR_TASK);
+    const char *task = crm_element_value(pseudo->xml, PCMK_XA_OPERATION);
 
     /* send to peers as well? */
     if (pcmk__str_eq(task, PCMK_ACTION_MAINTENANCE_NODES, pcmk__str_casei)) {
@@ -62,7 +61,7 @@ execute_pseudo_action(pcmk__graph_t *graph, pcmk__graph_action_t *pseudo)
 
             cmd = create_request(task, pseudo->xml, node->uname,
                                  CRM_SYSTEM_CRMD, CRM_SYSTEM_TENGINE, NULL);
-            send_cluster_message(node, crm_msg_crmd, cmd, FALSE);
+            pcmk__cluster_send_message(node, crm_msg_crmd, cmd);
             free_xml(cmd);
         }
 
@@ -73,7 +72,7 @@ execute_pseudo_action(pcmk__graph_t *graph, pcmk__graph_action_t *pseudo)
     }
 
     crm_debug("Pseudo-action %d (%s) fired and confirmed", pseudo->id,
-              crm_element_value(pseudo->xml, XML_LRM_ATTR_TASK_KEY));
+              crm_element_value(pseudo->xml, PCMK__XA_OPERATION_KEY));
     te_action_confirmed(pseudo, graph);
     return pcmk_rc_ok;
 }
@@ -83,7 +82,7 @@ get_target_rc(pcmk__graph_action_t *action)
 {
     int exit_status;
 
-    pcmk__scan_min_int(crm_meta_value(action->params, XML_ATTR_TE_TARGET_RC),
+    pcmk__scan_min_int(crm_meta_value(action->params, PCMK__META_OP_TARGET_RC),
                        &exit_status, 0);
     return exit_status;
 }
@@ -113,22 +112,24 @@ execute_cluster_action(pcmk__graph_t *graph, pcmk__graph_action_t *action)
     gboolean rc = TRUE;
     gboolean no_wait = FALSE;
 
-    id = ID(action->xml);
+    const crm_node_t *node = NULL;
+
+    id = pcmk__xe_id(action->xml);
     CRM_CHECK(!pcmk__str_empty(id), return EPROTO);
 
-    task = crm_element_value(action->xml, XML_LRM_ATTR_TASK);
+    task = crm_element_value(action->xml, PCMK_XA_OPERATION);
     CRM_CHECK(!pcmk__str_empty(task), return EPROTO);
 
-    on_node = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
+    on_node = crm_element_value(action->xml, PCMK__META_ON_NODE);
     CRM_CHECK(!pcmk__str_empty(on_node), return pcmk_rc_node_unknown);
 
-    router_node = crm_element_value(action->xml, XML_LRM_ATTR_ROUTER_NODE);
+    router_node = crm_element_value(action->xml, PCMK__XA_ROUTER_NODE);
     if (router_node == NULL) {
         router_node = on_node;
         if (pcmk__str_eq(task, PCMK_ACTION_LRM_DELETE, pcmk__str_none)) {
             const char *mode = crm_element_value(action->xml, PCMK__XA_MODE);
 
-            if (pcmk__str_eq(mode, XML_TAG_CIB, pcmk__str_none)) {
+            if (pcmk__str_eq(mode, PCMK__VALUE_CIB, pcmk__str_none)) {
                 router_node = controld_globals.our_nodename;
             }
         }
@@ -139,7 +140,7 @@ execute_cluster_action(pcmk__graph_t *graph, pcmk__graph_action_t *action)
         is_local = TRUE;
     }
 
-    value = crm_meta_value(action->params, XML_ATTR_TE_NOWAIT);
+    value = crm_meta_value(action->params, PCMK__META_OP_NO_WAIT);
     if (crm_is_true(value)) {
         no_wait = TRUE;
     }
@@ -158,7 +159,8 @@ execute_cluster_action(pcmk__graph_t *graph, pcmk__graph_action_t *action)
         return pcmk_rc_ok;
 
     } else if (pcmk__str_eq(task, PCMK_ACTION_DO_SHUTDOWN, pcmk__str_none)) {
-        crm_node_t *peer = crm_get_peer(0, router_node);
+        crm_node_t *peer = pcmk__get_node(0, router_node, NULL,
+                                          pcmk__node_search_cluster_member);
 
         pcmk__update_peer_expected(__func__, peer, CRMD_JOINSTATE_DOWN);
     }
@@ -168,9 +170,11 @@ execute_cluster_action(pcmk__graph_t *graph, pcmk__graph_action_t *action)
     counter = pcmk__transition_key(controld_globals.transition_graph->id,
                                    action->id, get_target_rc(action),
                                    controld_globals.te_uuid);
-    crm_xml_add(cmd, XML_ATTR_TRANSITION_KEY, counter);
+    crm_xml_add(cmd, PCMK__XA_TRANSITION_KEY, counter);
 
-    rc = send_cluster_message(crm_get_peer(0, router_node), crm_msg_crmd, cmd, TRUE);
+    node = pcmk__get_node(0, router_node, NULL,
+                          pcmk__node_search_cluster_member);
+    rc = pcmk__cluster_send_message(node, crm_msg_crmd, cmd);
     free(counter);
     free_xml(cmd);
 
@@ -213,16 +217,17 @@ static lrmd_event_data_t *
 synthesize_timeout_event(const pcmk__graph_action_t *action, int target_rc)
 {
     lrmd_event_data_t *op = NULL;
-    const char *target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
+    const char *target = crm_element_value(action->xml, PCMK__META_ON_NODE);
     const char *reason = NULL;
     char *dynamic_reason = NULL;
 
-    if (pcmk__str_eq(target, get_local_node_name(), pcmk__str_casei)) {
+    if (pcmk__str_eq(target, pcmk__cluster_local_node_name(),
+                     pcmk__str_casei)) {
         reason = "Local executor did not return result in time";
     } else {
         const char *router_node = NULL;
 
-        router_node = crm_element_value(action->xml, XML_LRM_ATTR_ROUTER_NODE);
+        router_node = crm_element_value(action->xml, PCMK__XA_ROUTER_NODE);
         if (router_node == NULL) {
             router_node = target;
         }
@@ -254,18 +259,21 @@ controld_record_action_event(pcmk__graph_action_t *action,
     int rc = pcmk_ok;
 
     const char *rsc_id = NULL;
-    const char *target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
-    const char *task_uuid = crm_element_value(action->xml, XML_LRM_ATTR_TASK_KEY);
-    const char *target_uuid = crm_element_value(action->xml, XML_LRM_ATTR_TARGET_UUID);
+    const char *target = crm_element_value(action->xml, PCMK__META_ON_NODE);
+    const char *task_uuid = crm_element_value(action->xml,
+                                              PCMK__XA_OPERATION_KEY);
+    const char *target_uuid = crm_element_value(action->xml,
+                                                PCMK__META_ON_NODE_UUID);
 
     int target_rc = get_target_rc(action);
 
-    action_rsc = find_xml_node(action->xml, XML_CIB_TAG_RESOURCE, TRUE);
+    action_rsc = pcmk__xe_first_child(action->xml, PCMK_XE_PRIMITIVE, NULL,
+                                      NULL);
     if (action_rsc == NULL) {
         return;
     }
 
-    rsc_id = ID(action_rsc);
+    rsc_id = pcmk__xe_id(action_rsc);
     CRM_CHECK(rsc_id != NULL,
               crm_log_xml_err(action->xml, "Bad:action"); return);
 
@@ -278,27 +286,27 @@ controld_record_action_event(pcmk__graph_action_t *action,
           <lrm_resource id="rsc2" last_op="start" op_code="0" target="hadev"/>
 */
 
-    state = create_xml_node(NULL, XML_CIB_TAG_STATE);
+    state = pcmk__xe_create(NULL, PCMK__XE_NODE_STATE);
 
-    crm_xml_add(state, XML_ATTR_ID, target_uuid);
-    crm_xml_add(state, XML_ATTR_UNAME, target);
+    crm_xml_add(state, PCMK_XA_ID, target_uuid);
+    crm_xml_add(state, PCMK_XA_UNAME, target);
 
-    rsc = create_xml_node(state, XML_CIB_TAG_LRM);
-    crm_xml_add(rsc, XML_ATTR_ID, target_uuid);
+    rsc = pcmk__xe_create(state, PCMK__XE_LRM);
+    crm_xml_add(rsc, PCMK_XA_ID, target_uuid);
 
-    rsc = create_xml_node(rsc, XML_LRM_TAG_RESOURCES);
-    rsc = create_xml_node(rsc, XML_LRM_TAG_RESOURCE);
-    crm_xml_add(rsc, XML_ATTR_ID, rsc_id);
+    rsc = pcmk__xe_create(rsc, PCMK__XE_LRM_RESOURCES);
+    rsc = pcmk__xe_create(rsc, PCMK__XE_LRM_RESOURCE);
+    crm_xml_add(rsc, PCMK_XA_ID, rsc_id);
 
 
-    crm_copy_xml_element(action_rsc, rsc, XML_ATTR_TYPE);
-    crm_copy_xml_element(action_rsc, rsc, XML_AGENT_ATTR_CLASS);
-    crm_copy_xml_element(action_rsc, rsc, XML_AGENT_ATTR_PROVIDER);
+    crm_copy_xml_element(action_rsc, rsc, PCMK_XA_TYPE);
+    crm_copy_xml_element(action_rsc, rsc, PCMK_XA_CLASS);
+    crm_copy_xml_element(action_rsc, rsc, PCMK_XA_PROVIDER);
 
     pcmk__create_history_xml(rsc, op, CRM_FEATURE_SET, target_rc, target,
                              __func__);
 
-    rc = cib_conn->cmds->modify(cib_conn, XML_CIB_TAG_STATUS, state,
+    rc = cib_conn->cmds->modify(cib_conn, PCMK_XE_STATUS, state,
                                 cib_scope_local);
     fsa_register_cib_callback(rc, NULL, cib_action_updated);
     free_xml(state);
@@ -313,8 +321,9 @@ controld_record_action_timeout(pcmk__graph_action_t *action)
 {
     lrmd_event_data_t *op = NULL;
 
-    const char *target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
-    const char *task_uuid = crm_element_value(action->xml, XML_LRM_ATTR_TASK_KEY);
+    const char *target = crm_element_value(action->xml, PCMK__META_ON_NODE);
+    const char *task_uuid = crm_element_value(action->xml,
+                                              PCMK__XA_OPERATION_KEY);
 
     int target_rc = get_target_rc(action);
 
@@ -362,17 +371,17 @@ execute_rsc_action(pcmk__graph_t *graph, pcmk__graph_action_t *action)
     CRM_ASSERT(action->xml != NULL);
 
     pcmk__clear_graph_action_flags(action, pcmk__graph_action_executed);
-    on_node = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
+    on_node = crm_element_value(action->xml, PCMK__META_ON_NODE);
 
     CRM_CHECK(!pcmk__str_empty(on_node),
               crm_err("Corrupted command(id=%s) %s: no node",
-                      ID(action->xml), pcmk__s(task, "without task"));
+                      pcmk__xe_id(action->xml), pcmk__s(task, "without task"));
               return pcmk_rc_node_unknown);
 
     rsc_op = action->xml;
-    task = crm_element_value(rsc_op, XML_LRM_ATTR_TASK);
-    task_uuid = crm_element_value(action->xml, XML_LRM_ATTR_TASK_KEY);
-    router_node = crm_element_value(rsc_op, XML_LRM_ATTR_ROUTER_NODE);
+    task = crm_element_value(rsc_op, PCMK_XA_OPERATION);
+    task_uuid = crm_element_value(action->xml, PCMK__XA_OPERATION_KEY);
+    router_node = crm_element_value(rsc_op, PCMK__XA_ROUTER_NODE);
 
     if (!router_node) {
         router_node = on_node;
@@ -381,14 +390,14 @@ execute_rsc_action(pcmk__graph_t *graph, pcmk__graph_action_t *action)
     counter = pcmk__transition_key(controld_globals.transition_graph->id,
                                    action->id, get_target_rc(action),
                                    controld_globals.te_uuid);
-    crm_xml_add(rsc_op, XML_ATTR_TRANSITION_KEY, counter);
+    crm_xml_add(rsc_op, PCMK__XA_TRANSITION_KEY, counter);
 
     if (pcmk__str_eq(router_node, controld_globals.our_nodename,
                      pcmk__str_casei)) {
         is_local = TRUE;
     }
 
-    value = crm_meta_value(action->params, XML_ATTR_TE_NOWAIT);
+    value = crm_meta_value(action->params, PCMK__META_OP_NO_WAIT);
     if (crm_is_true(value)) {
         no_wait = TRUE;
     }
@@ -421,7 +430,11 @@ execute_rsc_action(pcmk__graph_t *graph, pcmk__graph_action_t *action)
                       I_NULL, &msg);
 
     } else {
-        rc = send_cluster_message(crm_get_peer(0, router_node), crm_msg_lrmd, cmd, TRUE);
+        const crm_node_t *node =
+            pcmk__get_node(0, router_node, NULL,
+                           pcmk__node_search_cluster_member);
+
+        rc = pcmk__cluster_send_message(node, crm_msg_lrmd, cmd);
     }
 
     free(counter);
@@ -500,8 +513,8 @@ te_update_job_count_on(const char *target, int offset, bool migrate)
 
     r = g_hash_table_lookup(te_targets, target);
     if(r == NULL) {
-        r = calloc(1, sizeof(struct te_peer_s));
-        r->name = strdup(target);
+        r = pcmk__assert_alloc(1, sizeof(struct te_peer_s));
+        r->name = pcmk__str_copy(target);
         g_hash_table_insert(te_targets, r->name, r);
     }
 
@@ -515,8 +528,8 @@ te_update_job_count_on(const char *target, int offset, bool migrate)
 static void
 te_update_job_count(pcmk__graph_action_t *action, int offset)
 {
-    const char *task = crm_element_value(action->xml, XML_LRM_ATTR_TASK);
-    const char *target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
+    const char *task = crm_element_value(action->xml, PCMK_XA_OPERATION);
+    const char *target = crm_element_value(action->xml, PCMK__META_ON_NODE);
 
     if ((action->type != pcmk__rsc_graph_action) || (target == NULL)) {
         /* No limit on these */
@@ -527,19 +540,22 @@ te_update_job_count(pcmk__graph_action_t *action, int offset)
      * on a remote node. For now, we count all actions occurring on a
      * remote node against the job list on the cluster node hosting
      * the connection resources */
-    target = crm_element_value(action->xml, XML_LRM_ATTR_ROUTER_NODE);
+    target = crm_element_value(action->xml, PCMK__XA_ROUTER_NODE);
 
     if ((target == NULL)
         && pcmk__strcase_any_of(task, PCMK_ACTION_MIGRATE_TO,
                                 PCMK_ACTION_MIGRATE_FROM, NULL)) {
-        const char *t1 = crm_meta_value(action->params, XML_LRM_ATTR_MIGRATE_SOURCE);
-        const char *t2 = crm_meta_value(action->params, XML_LRM_ATTR_MIGRATE_TARGET);
+
+        const char *t1 = crm_meta_value(action->params,
+                                        PCMK__META_MIGRATE_SOURCE);
+        const char *t2 = crm_meta_value(action->params,
+                                        PCMK__META_MIGRATE_TARGET);
 
         te_update_job_count_on(t1, offset, TRUE);
         te_update_job_count_on(t2, offset, TRUE);
         return;
     } else if (target == NULL) {
-        target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
+        target = crm_element_value(action->xml, PCMK__META_ON_NODE);
     }
 
     te_update_job_count_on(target, offset, FALSE);
@@ -561,8 +577,8 @@ allowed_on_node(const pcmk__graph_t *graph, const pcmk__graph_action_t *action,
 {
     int limit = 0;
     struct te_peer_s *r = NULL;
-    const char *task = crm_element_value(action->xml, XML_LRM_ATTR_TASK);
-    const char *id = crm_element_value(action->xml, XML_LRM_ATTR_TASK_KEY);
+    const char *task = crm_element_value(action->xml, PCMK_XA_OPERATION);
+    const char *id = crm_element_value(action->xml, PCMK__XA_OPERATION_KEY);
 
     if(target == NULL) {
         /* No limit on these */
@@ -576,8 +592,8 @@ allowed_on_node(const pcmk__graph_t *graph, const pcmk__graph_action_t *action,
     limit = throttle_get_job_limit(target);
 
     if(r == NULL) {
-        r = calloc(1, sizeof(struct te_peer_s));
-        r->name = strdup(target);
+        r = pcmk__assert_alloc(1, sizeof(struct te_peer_s));
+        r->name = pcmk__str_copy(target);
         g_hash_table_insert(te_targets, r->name, r);
     }
 
@@ -613,7 +629,7 @@ static bool
 graph_action_allowed(pcmk__graph_t *graph, pcmk__graph_action_t *action)
 {
     const char *target = NULL;
-    const char *task = crm_element_value(action->xml, XML_LRM_ATTR_TASK);
+    const char *task = crm_element_value(action->xml, PCMK_XA_OPERATION);
 
     if (action->type != pcmk__rsc_graph_action) {
         /* No limit on these */
@@ -624,20 +640,20 @@ graph_action_allowed(pcmk__graph_t *graph, pcmk__graph_action_t *action)
      * on a remote node. For now, we count all actions occurring on a
      * remote node against the job list on the cluster node hosting
      * the connection resources */
-    target = crm_element_value(action->xml, XML_LRM_ATTR_ROUTER_NODE);
+    target = crm_element_value(action->xml, PCMK__XA_ROUTER_NODE);
 
     if ((target == NULL)
         && pcmk__strcase_any_of(task, PCMK_ACTION_MIGRATE_TO,
                                 PCMK_ACTION_MIGRATE_FROM, NULL)) {
-        target = crm_meta_value(action->params, XML_LRM_ATTR_MIGRATE_SOURCE);
+        target = crm_meta_value(action->params, PCMK__META_MIGRATE_SOURCE);
         if (!allowed_on_node(graph, action, target)) {
             return false;
         }
 
-        target = crm_meta_value(action->params, XML_LRM_ATTR_MIGRATE_TARGET);
+        target = crm_meta_value(action->params, PCMK__META_MIGRATE_TARGET);
 
     } else if (target == NULL) {
-        target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
+        target = crm_element_value(action->xml, PCMK__META_ON_NODE);
     }
 
     return allowed_on_node(graph, action, target);
@@ -654,7 +670,7 @@ te_action_confirmed(pcmk__graph_action_t *action, pcmk__graph_t *graph)
 {
     if (!pcmk_is_set(action->flags, pcmk__graph_action_confirmed)) {
         if ((action->type == pcmk__rsc_graph_action)
-            && (crm_element_value(action->xml, XML_LRM_ATTR_TARGET) != NULL)) {
+            && (crm_element_value(action->xml, PCMK__META_ON_NODE) != NULL)) {
             te_update_job_count(action, -1);
         }
         pcmk__set_graph_action_flags(action, pcmk__graph_action_confirmed);
diff --git a/daemons/controld/controld_te_callbacks.c b/daemons/controld/controld_te_callbacks.c
index c26e757..901d44d 100644
--- a/daemons/controld/controld_te_callbacks.c
+++ b/daemons/controld/controld_te_callbacks.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,23 +14,21 @@
 #include <crm/crm.h>
 #include <crm/common/xml.h>
 #include <crm/common/xml_internal.h>
-#include <crm/msg_xml.h>
-#include <crm/cluster.h>        /* For ONLINESTATUS etc */
 
 #include <pacemaker-controld.h>
 
 void te_update_confirm(const char *event, xmlNode * msg);
 
-#define RSC_OP_PREFIX "//" XML_TAG_DIFF_ADDED "//" XML_TAG_CIB \
-                      "//" XML_LRM_TAG_RSC_OP "[@" XML_ATTR_ID "='"
+#define RSC_OP_PREFIX "//" PCMK__XE_DIFF_ADDED "//" PCMK_XE_CIB \
+                      "//" PCMK__XE_LRM_RSC_OP "[@" PCMK_XA_ID "='"
 
-// An explicit shutdown-lock of 0 means the lock has been cleared
+// An explicit PCMK_OPT_SHUTDOWN_LOCK of 0 means the lock has been cleared
 static bool
 shutdown_lock_cleared(xmlNode *lrm_resource)
 {
     time_t shutdown_lock = 0;
 
-    return (crm_element_value_epoch(lrm_resource, XML_CONFIG_ATTR_SHUTDOWN_LOCK,
+    return (crm_element_value_epoch(lrm_resource, PCMK_OPT_SHUTDOWN_LOCK,
                                     &shutdown_lock) == pcmk_ok)
            && (shutdown_lock == 0);
 }
@@ -49,19 +47,21 @@ te_update_diff_v1(const char *event, xmlNode *diff)
                                          "xml-patchset", diff);
 
     if (cib__config_changed_v1(NULL, NULL, &diff)) {
-        abort_transition(INFINITY, pcmk__graph_restart, "Non-status change",
-                         diff);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Non-status change", diff);
         goto bail;              /* configuration changed */
     }
 
     /* Tickets Attributes - Added/Updated */
     xpathObj =
         xpath_search(diff,
-                     "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_ADDED "//" XML_CIB_TAG_TICKETS);
+                     "//" PCMK__XE_CIB_UPDATE_RESULT
+                     "//" PCMK__XE_DIFF_ADDED
+                     "//" PCMK_XE_TICKETS);
     if (numXpathResults(xpathObj) > 0) {
         xmlNode *aborted = getXpathResult(xpathObj, 0);
 
-        abort_transition(INFINITY, pcmk__graph_restart,
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                          "Ticket attribute: update", aborted);
         goto bail;
 
@@ -71,11 +71,13 @@ te_update_diff_v1(const char *event, xmlNode *diff)
     /* Tickets Attributes - Removed */
     xpathObj =
         xpath_search(diff,
-                     "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_REMOVED "//" XML_CIB_TAG_TICKETS);
+                     "//" PCMK__XE_CIB_UPDATE_RESULT
+                     "//" PCMK__XE_DIFF_REMOVED
+                     "//" PCMK_XE_TICKETS);
     if (numXpathResults(xpathObj) > 0) {
         xmlNode *aborted = getXpathResult(xpathObj, 0);
 
-        abort_transition(INFINITY, pcmk__graph_restart,
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                          "Ticket attribute: removal", aborted);
         goto bail;
     }
@@ -84,23 +86,24 @@ te_update_diff_v1(const char *event, xmlNode *diff)
     /* Transient Attributes - Removed */
     xpathObj =
         xpath_search(diff,
-                     "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_REMOVED "//"
-                     XML_TAG_TRANSIENT_NODEATTRS);
+                     "//" PCMK__XE_CIB_UPDATE_RESULT
+                     "//" PCMK__XE_DIFF_REMOVED
+                     "//" PCMK__XE_TRANSIENT_ATTRIBUTES);
     if (numXpathResults(xpathObj) > 0) {
         xmlNode *aborted = getXpathResult(xpathObj, 0);
 
-        abort_transition(INFINITY, pcmk__graph_restart,
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                          "Transient attribute: removal", aborted);
         goto bail;
 
     }
     freeXpathObject(xpathObj);
 
-    // Check for lrm_resource entries
+    // Check for PCMK__XE_LRM_RESOURCE entries
     xpathObj = xpath_search(diff,
-                            "//" F_CIB_UPDATE_RESULT
-                            "//" XML_TAG_DIFF_ADDED
-                            "//" XML_LRM_TAG_RESOURCE);
+                            "//" PCMK__XE_CIB_UPDATE_RESULT
+                            "//" PCMK__XE_DIFF_ADDED
+                            "//" PCMK__XE_LRM_RESOURCE);
     max = numXpathResults(xpathObj);
 
     /*
@@ -117,8 +120,8 @@ te_update_diff_v1(const char *event, xmlNode *diff)
         crm_debug("Ignoring resource operation updates due to history refresh of %d resources",
                   max);
         crm_log_xml_trace(diff, "lrm-refresh");
-        abort_transition(INFINITY, pcmk__graph_restart, "History refresh",
-                         NULL);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "History refresh", NULL);
         goto bail;
     }
 
@@ -127,7 +130,7 @@ te_update_diff_v1(const char *event, xmlNode *diff)
 
         if (shutdown_lock_cleared(lrm_resource)) {
             // @TODO would be more efficient to abort once after transition done
-            abort_transition(INFINITY, pcmk__graph_restart,
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                              "Shutdown lock cleared", lrm_resource);
             // Still process results, so we stop timers and update failcounts
         }
@@ -137,7 +140,9 @@ te_update_diff_v1(const char *event, xmlNode *diff)
     /* Process operation updates */
     xpathObj =
         xpath_search(diff,
-                     "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_ADDED "//" XML_LRM_TAG_RSC_OP);
+                     "//" PCMK__XE_CIB_UPDATE_RESULT
+                     "//" PCMK__XE_DIFF_ADDED
+                     "//" PCMK__XE_LRM_RSC_OP);
     max = numXpathResults(xpathObj);
     if (max > 0) {
         int lpc = 0;
@@ -152,7 +157,9 @@ te_update_diff_v1(const char *event, xmlNode *diff)
     freeXpathObject(xpathObj);
 
     /* Detect deleted (as opposed to replaced or added) actions - eg. crm_resource -C */
-    xpathObj = xpath_search(diff, "//" XML_TAG_DIFF_REMOVED "//" XML_LRM_TAG_RSC_OP);
+    xpathObj = xpath_search(diff,
+                            "//" PCMK__XE_DIFF_REMOVED
+                            "//" PCMK__XE_LRM_RSC_OP);
     max = numXpathResults(xpathObj);
     for (lpc = 0; lpc < max; lpc++) {
         const char *op_id = NULL;
@@ -162,7 +169,7 @@ te_update_diff_v1(const char *event, xmlNode *diff)
         CRM_LOG_ASSERT(match != NULL);
         if(match == NULL) { continue; };
 
-        op_id = ID(match);
+        op_id = pcmk__xe_id(match);
 
         if (rsc_op_xpath == NULL) {
             rsc_op_xpath = g_string_new(RSC_OP_PREFIX);
@@ -180,13 +187,14 @@ te_update_diff_v1(const char *event, xmlNode *diff)
             if (cancelled == NULL) {
                 crm_debug("No match for deleted action %s (%s on %s)",
                           (const char *) rsc_op_xpath->str, op_id, node);
-                abort_transition(INFINITY, pcmk__graph_restart,
+                abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                                  "Resource op removal", match);
                 freeXpathObject(op_match);
                 goto bail;
 
             } else {
-                crm_debug("Deleted lrm_rsc_op %s on %s was for graph event %d",
+                crm_debug("Deleted " PCMK__XE_LRM_RSC_OP " %s on %s was for "
+                          "graph event %d",
                           op_id, node, cancelled->id);
             }
         }
@@ -204,14 +212,14 @@ te_update_diff_v1(const char *event, xmlNode *diff)
 static void
 process_lrm_resource_diff(xmlNode *lrm_resource, const char *node)
 {
-    for (xmlNode *rsc_op = pcmk__xml_first_child(lrm_resource); rsc_op != NULL;
-         rsc_op = pcmk__xml_next(rsc_op)) {
+    for (xmlNode *rsc_op = pcmk__xe_first_child(lrm_resource, NULL, NULL, NULL);
+         rsc_op != NULL; rsc_op = pcmk__xe_next(rsc_op)) {
         process_graph_event(rsc_op, node);
     }
     if (shutdown_lock_cleared(lrm_resource)) {
         // @TODO would be more efficient to abort once after transition done
-        abort_transition(INFINITY, pcmk__graph_restart, "Shutdown lock cleared",
-                         lrm_resource);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Shutdown lock cleared", lrm_resource);
     }
 }
 
@@ -225,12 +233,12 @@ process_resource_updates(const char *node, xmlNode *xml, xmlNode *change,
         return;
     }
 
-    if (pcmk__xe_is(xml, XML_CIB_TAG_LRM)) {
-        xml = first_named_child(xml, XML_LRM_TAG_RESOURCES);
+    if (pcmk__xe_is(xml, PCMK__XE_LRM)) {
+        xml = pcmk__xe_first_child(xml, PCMK__XE_LRM_RESOURCES, NULL, NULL);
         CRM_CHECK(xml != NULL, return);
     }
 
-    CRM_CHECK(pcmk__xe_is(xml, XML_LRM_TAG_RESOURCES), return);
+    CRM_CHECK(pcmk__xe_is(xml, PCMK__XE_LRM_RESOURCES), return);
 
     /*
      * Updates by, or in response to, TE actions will never contain updates
@@ -248,31 +256,31 @@ process_resource_updates(const char *node, xmlNode *xml, xmlNode *change,
         && (xml->children != NULL) && (xml->children->next != NULL)) {
 
         crm_log_xml_trace(change, "lrm-refresh");
-        abort_transition(INFINITY, pcmk__graph_restart, "History refresh",
-                         NULL);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "History refresh", NULL);
         return;
     }
 
-    for (rsc = pcmk__xml_first_child(xml); rsc != NULL;
-         rsc = pcmk__xml_next(rsc)) {
-        crm_trace("Processing %s", ID(rsc));
+    for (rsc = pcmk__xe_first_child(xml, NULL, NULL, NULL); rsc != NULL;
+         rsc = pcmk__xe_next(rsc)) {
+        crm_trace("Processing %s", pcmk__xe_id(rsc));
         process_lrm_resource_diff(rsc, node);
     }
 }
 
 static char *extract_node_uuid(const char *xpath) 
 {
-    char *mutable_path = strdup(xpath);
+    char *mutable_path = pcmk__str_copy(xpath);
     char *node_uuid = NULL;
     char *search = NULL;
     char *match = NULL;
 
-    match = strstr(mutable_path, "node_state[@" XML_ATTR_ID "=\'");
+    match = strstr(mutable_path, PCMK__XE_NODE_STATE "[@" PCMK_XA_ID "=\'");
     if (match == NULL) {
         free(mutable_path);
         return NULL;
     }
-    match += strlen("node_state[@" XML_ATTR_ID "=\'");
+    match += strlen(PCMK__XE_NODE_STATE "[@" PCMK_XA_ID "=\'");
 
     search = strchr(match, '\'');
     if (search == NULL) {
@@ -281,7 +289,7 @@ static char *extract_node_uuid(const char *xpath)
     }
     search[0] = 0;
 
-    node_uuid = strdup(match);
+    node_uuid = pcmk__str_copy(match);
     free(mutable_path);
     return node_uuid;
 }
@@ -293,22 +301,25 @@ abort_unless_down(const char *xpath, const char *op, xmlNode *change,
     char *node_uuid = NULL;
     pcmk__graph_action_t *down = NULL;
 
-    if(!pcmk__str_eq(op, "delete", pcmk__str_casei)) {
-        abort_transition(INFINITY, pcmk__graph_restart, reason, change);
+    if (!pcmk__str_eq(op, PCMK_VALUE_DELETE, pcmk__str_none)) {
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart, reason,
+                         change);
         return;
     }
 
     node_uuid = extract_node_uuid(xpath);
     if(node_uuid == NULL) {
         crm_err("Could not extract node ID from %s", xpath);
-        abort_transition(INFINITY, pcmk__graph_restart, reason, change);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart, reason,
+                         change);
         return;
     }
 
     down = match_down_event(node_uuid);
     if (down == NULL) {
         crm_trace("Not expecting %s to be down (%s)", node_uuid, xpath);
-        abort_transition(INFINITY, pcmk__graph_restart, reason, change);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart, reason,
+                         change);
     } else {
         crm_trace("Expecting changes to %s (%s)", node_uuid, xpath);
     }
@@ -318,7 +329,7 @@ abort_unless_down(const char *xpath, const char *op, xmlNode *change,
 static void
 process_op_deletion(const char *xpath, xmlNode *change)
 {
-    char *mutable_key = strdup(xpath);
+    char *mutable_key = pcmk__str_copy(xpath);
     char *key;
     char *node_uuid;
 
@@ -338,7 +349,7 @@ process_op_deletion(const char *xpath, xmlNode *change)
 
     node_uuid = extract_node_uuid(xpath);
     if (confirm_cancel_action(key, node_uuid) == FALSE) {
-        abort_transition(INFINITY, pcmk__graph_restart,
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                          "Resource operation removal", change);
     }
     free(mutable_key);
@@ -348,13 +359,13 @@ process_op_deletion(const char *xpath, xmlNode *change)
 static void
 process_delete_diff(const char *xpath, const char *op, xmlNode *change)
 {
-    if (strstr(xpath, "/" XML_LRM_TAG_RSC_OP "[")) {
+    if (strstr(xpath, "/" PCMK__XE_LRM_RSC_OP "[")) {
         process_op_deletion(xpath, change);
 
-    } else if (strstr(xpath, "/" XML_CIB_TAG_LRM "[")) {
+    } else if (strstr(xpath, "/" PCMK__XE_LRM "[")) {
         abort_unless_down(xpath, op, change, "Resource state removal");
 
-    } else if (strstr(xpath, "/" XML_CIB_TAG_STATE "[")) {
+    } else if (strstr(xpath, "/" PCMK__XE_NODE_STATE "[")) {
         abort_unless_down(xpath, op, change, "Node state removal");
 
     } else {
@@ -366,17 +377,18 @@ static void
 process_node_state_diff(xmlNode *state, xmlNode *change, const char *op,
                         const char *xpath)
 {
-    xmlNode *lrm = first_named_child(state, XML_CIB_TAG_LRM);
+    xmlNode *lrm = pcmk__xe_first_child(state, PCMK__XE_LRM, NULL, NULL);
 
-    process_resource_updates(ID(state), lrm, change, op, xpath);
+    process_resource_updates(pcmk__xe_id(state), lrm, change, op, xpath);
 }
 
 static void
 process_status_diff(xmlNode *status, xmlNode *change, const char *op,
                     const char *xpath)
 {
-    for (xmlNode *state = pcmk__xml_first_child(status); state != NULL;
-         state = pcmk__xml_next(state)) {
+    for (xmlNode *state = pcmk__xe_first_child(status, NULL, NULL, NULL);
+         state != NULL; state = pcmk__xe_next(state)) {
+
         process_node_state_diff(state, change, op, xpath);
     }
 }
@@ -385,144 +397,152 @@ static void
 process_cib_diff(xmlNode *cib, xmlNode *change, const char *op,
                  const char *xpath)
 {
-    xmlNode *status = first_named_child(cib, XML_CIB_TAG_STATUS);
-    xmlNode *config = first_named_child(cib, XML_CIB_TAG_CONFIGURATION);
+    xmlNode *status = pcmk__xe_first_child(cib, PCMK_XE_STATUS, NULL, NULL);
+    xmlNode *config = pcmk__xe_first_child(cib, PCMK_XE_CONFIGURATION, NULL,
+                                           NULL);
 
     if (status) {
         process_status_diff(status, change, op, xpath);
     }
     if (config) {
-        abort_transition(INFINITY, pcmk__graph_restart,
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                          "Non-status-only change", change);
     }
 }
 
-static void
-te_update_diff_v2(xmlNode *diff)
+static int
+te_update_diff_element_v2(xmlNode *change, void *userdata)
 {
-    crm_log_xml_trace(diff, "Patch:Raw");
-
-    for (xmlNode *change = pcmk__xml_first_child(diff); change != NULL;
-         change = pcmk__xml_next(change)) {
-
-        xmlNode *match = NULL;
-        const char *name = NULL;
-        const char *xpath = crm_element_value(change, XML_DIFF_PATH);
-
-        // Possible ops: create, modify, delete, move
-        const char *op = crm_element_value(change, XML_DIFF_OP);
-
-        // Ignore uninteresting updates
-        if (op == NULL) {
-            continue;
-
-        } else if (xpath == NULL) {
-            crm_trace("Ignoring %s change for version field", op);
-            continue;
-
-        } else if ((strcmp(op, "move") == 0)
-                   && (strstr(xpath,
-                              "/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION
-                              "/" XML_CIB_TAG_RESOURCES) == NULL)) {
-            /* We still need to consider moves within the resources section,
-             * since they affect placement order.
-             */
-            crm_trace("Ignoring move change at %s", xpath);
-            continue;
+    xmlNode *match = NULL;
+    const char *name = NULL;
+    const char *xpath = crm_element_value(change, PCMK_XA_PATH);
+
+    // Possible ops: create, modify, delete, move
+    const char *op = crm_element_value(change, PCMK_XA_OPERATION);
+
+    // Ignore uninteresting updates
+    if (op == NULL) {
+        return pcmk_rc_ok;
+
+    } else if (xpath == NULL) {
+        crm_trace("Ignoring %s change for version field", op);
+        return pcmk_rc_ok;
+
+    } else if ((strcmp(op, PCMK_VALUE_MOVE) == 0)
+               && (strstr(xpath,
+                          "/" PCMK_XE_CIB "/" PCMK_XE_CONFIGURATION
+                          "/" PCMK_XE_RESOURCES) == NULL)) {
+        /* We still need to consider moves within the resources section,
+         * since they affect placement order.
+         */
+        crm_trace("Ignoring move change at %s", xpath);
+        return pcmk_rc_ok;
+    }
+
+    // Find the result of create/modify ops
+    if (strcmp(op, PCMK_VALUE_CREATE) == 0) {
+        match = change->children;
+
+    } else if (strcmp(op, PCMK_VALUE_MODIFY) == 0) {
+        match = pcmk__xe_first_child(change, PCMK_XE_CHANGE_RESULT, NULL, NULL);
+        if(match) {
+            match = match->children;
         }
 
-        // Find the result of create/modify ops
-        if (strcmp(op, "create") == 0) {
-            match = change->children;
-
-        } else if (strcmp(op, "modify") == 0) {
-            match = first_named_child(change, XML_DIFF_RESULT);
-            if(match) {
-                match = match->children;
-            }
-
-        } else if (!pcmk__str_any_of(op, "delete", "move", NULL)) {
-            crm_warn("Ignoring malformed CIB update (%s operation on %s is unrecognized)",
-                     op, xpath);
-            continue;
-        }
+    } else if (!pcmk__str_any_of(op,
+                                 PCMK_VALUE_DELETE, PCMK_VALUE_MOVE,
+                                 NULL)) {
+        crm_warn("Ignoring malformed CIB update (%s operation on %s is unrecognized)",
+                 op, xpath);
+        return pcmk_rc_ok;
+    }
 
-        if (match) {
-            if (match->type == XML_COMMENT_NODE) {
-                crm_trace("Ignoring %s operation for comment at %s", op, xpath);
-                continue;
-            }
-            name = (const char *)match->name;
+    if (match) {
+        if (match->type == XML_COMMENT_NODE) {
+            crm_trace("Ignoring %s operation for comment at %s", op, xpath);
+            return pcmk_rc_ok;
         }
+        name = (const char *)match->name;
+    }
 
-        crm_trace("Handling %s operation for %s%s%s",
-                  op, (xpath? xpath : "CIB"),
-                  (name? " matched by " : ""), (name? name : ""));
+    crm_trace("Handling %s operation for %s%s%s",
+              op, (xpath? xpath : "CIB"),
+              (name? " matched by " : ""), (name? name : ""));
 
-        if (strstr(xpath, "/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION)) {
-            abort_transition(INFINITY, pcmk__graph_restart,
-                             "Configuration change", change);
-            break; // Won't be packaged with operation results we may be waiting for
+    if (strstr(xpath, "/" PCMK_XE_CIB "/" PCMK_XE_CONFIGURATION)) {
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Configuration change", change);
+        return pcmk_rc_cib_modified; // Won't be packaged with operation results we may be waiting for
 
-        } else if (strstr(xpath, "/" XML_CIB_TAG_TICKETS)
-                   || pcmk__str_eq(name, XML_CIB_TAG_TICKETS, pcmk__str_none)) {
-            abort_transition(INFINITY, pcmk__graph_restart,
-                             "Ticket attribute change", change);
-            break; // Won't be packaged with operation results we may be waiting for
+    } else if (strstr(xpath, "/" PCMK_XE_TICKETS)
+               || pcmk__str_eq(name, PCMK_XE_TICKETS, pcmk__str_none)) {
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Ticket attribute change", change);
+        return pcmk_rc_cib_modified; // Won't be packaged with operation results we may be waiting for
 
-        } else if (strstr(xpath, "/" XML_TAG_TRANSIENT_NODEATTRS "[")
-                   || pcmk__str_eq(name, XML_TAG_TRANSIENT_NODEATTRS,
-                                   pcmk__str_none)) {
-            abort_unless_down(xpath, op, change, "Transient attribute change");
-            break; // Won't be packaged with operation results we may be waiting for
+    } else if (strstr(xpath, "/" PCMK__XE_TRANSIENT_ATTRIBUTES "[")
+               || pcmk__str_eq(name, PCMK__XE_TRANSIENT_ATTRIBUTES,
+                               pcmk__str_none)) {
+        abort_unless_down(xpath, op, change, "Transient attribute change");
+        return pcmk_rc_cib_modified; // Won't be packaged with operation results we may be waiting for
 
-        } else if (strcmp(op, "delete") == 0) {
-            process_delete_diff(xpath, op, change);
+    } else if (strcmp(op, PCMK_VALUE_DELETE) == 0) {
+        process_delete_diff(xpath, op, change);
 
-        } else if (name == NULL) {
-            crm_warn("Ignoring malformed CIB update (%s at %s has no result)",
-                     op, xpath);
+    } else if (name == NULL) {
+        crm_warn("Ignoring malformed CIB update (%s at %s has no result)",
+                 op, xpath);
 
-        } else if (strcmp(name, XML_TAG_CIB) == 0) {
-            process_cib_diff(match, change, op, xpath);
+    } else if (strcmp(name, PCMK_XE_CIB) == 0) {
+        process_cib_diff(match, change, op, xpath);
 
-        } else if (strcmp(name, XML_CIB_TAG_STATUS) == 0) {
-            process_status_diff(match, change, op, xpath);
+    } else if (strcmp(name, PCMK_XE_STATUS) == 0) {
+        process_status_diff(match, change, op, xpath);
 
-        } else if (strcmp(name, XML_CIB_TAG_STATE) == 0) {
-            process_node_state_diff(match, change, op, xpath);
+    } else if (strcmp(name, PCMK__XE_NODE_STATE) == 0) {
+        process_node_state_diff(match, change, op, xpath);
 
-        } else if (strcmp(name, XML_CIB_TAG_LRM) == 0) {
-            process_resource_updates(ID(match), match, change, op, xpath);
+    } else if (strcmp(name, PCMK__XE_LRM) == 0) {
+        process_resource_updates(pcmk__xe_id(match), match, change, op,
+                                 xpath);
 
-        } else if (strcmp(name, XML_LRM_TAG_RESOURCES) == 0) {
-            char *local_node = pcmk__xpath_node_id(xpath, "lrm");
+    } else if (strcmp(name, PCMK__XE_LRM_RESOURCES) == 0) {
+        char *local_node = pcmk__xpath_node_id(xpath, PCMK__XE_LRM);
 
-            process_resource_updates(local_node, match, change, op, xpath);
-            free(local_node);
+        process_resource_updates(local_node, match, change, op, xpath);
+        free(local_node);
 
-        } else if (strcmp(name, XML_LRM_TAG_RESOURCE) == 0) {
-            char *local_node = pcmk__xpath_node_id(xpath, "lrm");
+    } else if (strcmp(name, PCMK__XE_LRM_RESOURCE) == 0) {
+        char *local_node = pcmk__xpath_node_id(xpath, PCMK__XE_LRM);
 
-            process_lrm_resource_diff(match, local_node);
-            free(local_node);
+        process_lrm_resource_diff(match, local_node);
+        free(local_node);
 
-        } else if (strcmp(name, XML_LRM_TAG_RSC_OP) == 0) {
-            char *local_node = pcmk__xpath_node_id(xpath, "lrm");
+    } else if (strcmp(name, PCMK__XE_LRM_RSC_OP) == 0) {
+        char *local_node = pcmk__xpath_node_id(xpath, PCMK__XE_LRM);
 
-            process_graph_event(match, local_node);
-            free(local_node);
+        process_graph_event(match, local_node);
+        free(local_node);
 
-        } else {
-            crm_warn("Ignoring malformed CIB update (%s at %s has unrecognized result %s)",
-                     op, xpath, name);
-        }
+    } else {
+        crm_warn("Ignoring malformed CIB update (%s at %s has unrecognized result %s)",
+                 op, xpath, name);
     }
+
+    return pcmk_rc_ok;
+}
+
+static void
+te_update_diff_v2(xmlNode *diff)
+{
+    crm_log_xml_trace(diff, "Patch:Raw");
+    pcmk__xe_foreach_child(diff, NULL, te_update_diff_element_v2, NULL);
 }
 
 void
 te_update_diff(const char *event, xmlNode * msg)
 {
+    xmlNode *wrapper = NULL;
     xmlNode *diff = NULL;
     const char *op = NULL;
     int rc = -EINVAL;
@@ -531,7 +551,7 @@ te_update_diff(const char *event, xmlNode * msg)
     int p_del[] = { 0, 0, 0 };
 
     CRM_CHECK(msg != NULL, return);
-    crm_element_value_int(msg, F_CIB_RC, &rc);
+    crm_element_value_int(msg, PCMK__XA_CIB_RC, &rc);
 
     if (controld_globals.transition_graph == NULL) {
         crm_trace("No graph");
@@ -550,8 +570,10 @@ te_update_diff(const char *event, xmlNode * msg)
         return;
     }
 
-    op = crm_element_value(msg, F_CIB_OPERATION);
-    diff = get_message_xml(msg, F_CIB_UPDATE_RESULT);
+    op = crm_element_value(msg, PCMK__XA_CIB_OP);
+
+    wrapper = pcmk__xe_first_child(msg, PCMK__XE_CIB_UPDATE_RESULT, NULL, NULL);
+    diff = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
     xml_patch_versions(diff, p_add, p_del);
     crm_debug("Processing (%s) diff: %d.%d.%d -> %d.%d.%d (%s)", op,
@@ -583,7 +605,7 @@ process_te_message(xmlNode * msg, xmlNode * xml_data)
     CRM_CHECK(msg != NULL, return);
 
     // Transition requests must specify transition engine as subsystem
-    value = crm_element_value(msg, F_CRM_SYS_TO);
+    value = crm_element_value(msg, PCMK__XA_CRM_SYS_TO);
     if (pcmk__str_empty(value)
         || !pcmk__str_eq(value, CRM_SYSTEM_TENGINE, pcmk__str_none)) {
         crm_info("Received invalid transition request: subsystem '%s' not '"
@@ -592,7 +614,7 @@ process_te_message(xmlNode * msg, xmlNode * xml_data)
     }
 
     // Only the lrm_invoke command is supported as a transition request
-    value = crm_element_value(msg, F_CRM_TASK);
+    value = crm_element_value(msg, PCMK__XA_CRM_TASK);
     if (!pcmk__str_eq(value, CRM_OP_INVOKE_LRM, pcmk__str_none)) {
         crm_info("Received invalid transition request: command '%s' not '"
                  CRM_OP_INVOKE_LRM "'", pcmk__s(value, ""));
@@ -600,7 +622,7 @@ process_te_message(xmlNode * msg, xmlNode * xml_data)
     }
 
     // Transition requests must be marked as coming from the executor
-    value = crm_element_value(msg, F_CRM_SYS_FROM);
+    value = crm_element_value(msg, PCMK__XA_CRM_SYS_FROM);
     if (!pcmk__str_eq(value, CRM_SYSTEM_LRMD, pcmk__str_none)) {
         crm_info("Received invalid transition request: from '%s' not '"
                  CRM_SYSTEM_LRMD "'", pcmk__s(value, ""));
@@ -608,10 +630,10 @@ process_te_message(xmlNode * msg, xmlNode * xml_data)
     }
 
     crm_debug("Processing transition request with ref='%s' origin='%s'",
-              pcmk__s(crm_element_value(msg, F_CRM_REFERENCE), ""),
-              pcmk__s(crm_element_value(msg, F_ORIG), ""));
+              pcmk__s(crm_element_value(msg, PCMK_XA_REFERENCE), ""),
+              pcmk__s(crm_element_value(msg, PCMK__XA_SRC), ""));
 
-    xpathObj = xpath_search(xml_data, "//" XML_LRM_TAG_RSC_OP);
+    xpathObj = xpath_search(xml_data, "//" PCMK__XE_LRM_RSC_OP);
     nmatches = numXpathResults(xpathObj);
     if (nmatches == 0) {
         crm_err("Received transition request with no results (bug?)");
@@ -653,9 +675,9 @@ action_timer_callback(gpointer data)
 
     stop_te_timer(action);
 
-    task = crm_element_value(action->xml, XML_LRM_ATTR_TASK);
-    on_node = crm_element_value(action->xml, XML_LRM_ATTR_TARGET);
-    via_node = crm_element_value(action->xml, XML_LRM_ATTR_ROUTER_NODE);
+    task = crm_element_value(action->xml, PCMK_XA_OPERATION);
+    on_node = crm_element_value(action->xml, PCMK__META_ON_NODE);
+    via_node = crm_element_value(action->xml, PCMK__XA_ROUTER_NODE);
 
     if (controld_globals.transition_graph->complete) {
         crm_notice("Node %s did not send %s result (via %s) within %dms "
@@ -666,7 +688,7 @@ action_timer_callback(gpointer data)
         /* fail the action */
 
         crm_err("Node %s did not send %s result (via %s) within %dms "
-                "(action timeout plus cluster-delay)",
+                "(action timeout plus " PCMK_OPT_CLUSTER_DELAY ")",
                 (on_node? on_node : ""), (task? task : "unknown action"),
                 (via_node? via_node : "controller"),
                 (action->timeout
@@ -676,7 +698,8 @@ action_timer_callback(gpointer data)
         pcmk__set_graph_action_flags(action, pcmk__graph_action_failed);
 
         te_action_confirmed(action, controld_globals.transition_graph);
-        abort_transition(INFINITY, pcmk__graph_restart, "Action lost", NULL);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Action lost", NULL);
 
         // Record timeout in the CIB if appropriate
         if ((action->type == pcmk__rsc_graph_action)
diff --git a/daemons/controld/controld_te_events.c b/daemons/controld/controld_te_events.c
index 28977c0..49c09f6 100644
--- a/daemons/controld/controld_te_events.c
+++ b/daemons/controld/controld_te_events.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -12,12 +12,11 @@
 #include <sys/param.h>
 #include <crm/crm.h>
 #include <crm/cib.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 
 #include <pacemaker-controld.h>
 
-#include <crm/common/attrd_internal.h>
+#include <crm/common/attrs_internal.h>
 #include <crm/common/ipc_attrd_internal.h>
 
 /*!
@@ -109,17 +108,22 @@ fail_incompletable_actions(pcmk__graph_t *graph, const char *down_node)
                 || pcmk_is_set(action->flags, pcmk__graph_action_confirmed)) {
                 continue;
             } else if (action->type == pcmk__cluster_graph_action) {
-                const char *task = crm_element_value(action->xml, XML_LRM_ATTR_TASK);
+                const char *task = crm_element_value(action->xml,
+                                                     PCMK_XA_OPERATION);
 
                 if (pcmk__str_eq(task, PCMK_ACTION_STONITH, pcmk__str_casei)) {
                     continue;
                 }
             }
 
-            target_uuid = crm_element_value(action->xml, XML_LRM_ATTR_TARGET_UUID);
-            router = crm_element_value(action->xml, XML_LRM_ATTR_ROUTER_NODE);
+            target_uuid = crm_element_value(action->xml,
+                                            PCMK__META_ON_NODE_UUID);
+            router = crm_element_value(action->xml, PCMK__XA_ROUTER_NODE);
             if (router) {
-                crm_node_t *node = crm_get_peer(0, router);
+                const crm_node_t *node =
+                    pcmk__get_node(0, router, NULL,
+                                   pcmk__node_search_cluster_member);
+
                 if (node) {
                     router_uuid = node->uuid;
                 }
@@ -134,10 +138,15 @@ fail_incompletable_actions(pcmk__graph_t *graph, const char *down_node)
 
                 if (pcmk_is_set(synapse->flags, pcmk__synapse_executed)) {
                     crm_notice("Action %d (%s) was pending on %s (offline)",
-                               action->id, crm_element_value(action->xml, XML_LRM_ATTR_TASK_KEY), down_node);
+                               action->id,
+                               crm_element_value(action->xml,
+                                                 PCMK__XA_OPERATION_KEY),
+                               down_node);
                 } else {
                     crm_info("Action %d (%s) is scheduled for %s (offline)",
-                             action->id, crm_element_value(action->xml, XML_LRM_ATTR_TASK_KEY), down_node);
+                             action->id,
+                             crm_element_value(action->xml, PCMK__XA_OPERATION_KEY),
+                             down_node);
                 }
             }
         }
@@ -145,8 +154,8 @@ fail_incompletable_actions(pcmk__graph_t *graph, const char *down_node)
 
     if (last_action != NULL) {
         crm_info("Node %s shutdown resulted in un-runnable actions", down_node);
-        abort_transition(INFINITY, pcmk__graph_restart, "Node failure",
-                         last_action);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Node failure", last_action);
         return TRUE;
     }
 
@@ -176,9 +185,9 @@ update_failcount(const xmlNode *event, const char *event_node_uuid, int rc,
     char *rsc_id = NULL;
 
     const char *value = NULL;
-    const char *id = crm_element_value(event, XML_LRM_ATTR_TASK_KEY);
-    const char *on_uname = crm_peer_uname(event_node_uuid);
-    const char *origin = crm_element_value(event, XML_ATTR_ORIGIN);
+    const char *id = crm_element_value(event, PCMK__XA_OPERATION_KEY);
+    const char *on_uname = pcmk__node_name_from_uuid(event_node_uuid);
+    const char *origin = crm_element_value(event, PCMK_XA_CRM_DEBUG_ORIGIN);
 
     // Nothing needs to be done for success or status refresh
     if (rc == target_rc) {
@@ -192,7 +201,7 @@ update_failcount(const xmlNode *event, const char *event_node_uuid, int rc,
     /* Sanity check */
     CRM_CHECK(on_uname != NULL, return TRUE);
     CRM_CHECK(parse_op_key(id, &rsc_id, &task, &interval_ms),
-              crm_err("Couldn't parse: %s", ID(event)); goto bail);
+              crm_err("Couldn't parse: %s", pcmk__xe_id(event)); goto bail);
 
     /* Decide whether update is necessary and what value to use */
     if ((interval_ms > 0)
@@ -203,12 +212,12 @@ update_failcount(const xmlNode *event, const char *event_node_uuid, int rc,
     } else if (pcmk__str_eq(task, PCMK_ACTION_START, pcmk__str_none)) {
         do_update = TRUE;
         value = pcmk__s(controld_globals.transition_graph->failed_start_offset,
-                        CRM_INFINITY_S);
+                        PCMK_VALUE_INFINITY);
 
     } else if (pcmk__str_eq(task, PCMK_ACTION_STOP, pcmk__str_none)) {
         do_update = TRUE;
         value = pcmk__s(controld_globals.transition_graph->failed_stop_offset,
-                        CRM_INFINITY_S);
+                        PCMK_VALUE_INFINITY);
     }
 
     if (do_update) {
@@ -224,7 +233,7 @@ update_failcount(const xmlNode *event, const char *event_node_uuid, int rc,
 
         // Fail count will be either incremented or set to infinity
         if (!pcmk_str_is_infinity(value)) {
-            value = XML_NVPAIR_ATTR_VALUE "++";
+            value = PCMK_XA_VALUE "++";
         }
 
         if (g_hash_table_lookup(crm_remote_peer_cache, event_node_uuid)) {
@@ -237,8 +246,7 @@ update_failcount(const xmlNode *event, const char *event_node_uuid, int rc,
 
         /* Update the fail count, if we're not ignoring failures */
         if (!ignore_failures) {
-            fail_pair = calloc(1, sizeof(pcmk__attrd_query_pair_t));
-            CRM_ASSERT(fail_pair != NULL);
+            fail_pair = pcmk__assert_alloc(1, sizeof(pcmk__attrd_query_pair_t));
 
             fail_name = pcmk__failcount_name(rsc_id, task, interval_ms);
             fail_pair->name = fail_name;
@@ -251,8 +259,7 @@ update_failcount(const xmlNode *event, const char *event_node_uuid, int rc,
         /* Update the last failure time (even if we're ignoring failures,
          * so that failure can still be detected and shown, e.g. by crm_mon)
          */
-        last_pair = calloc(1, sizeof(pcmk__attrd_query_pair_t));
-        CRM_ASSERT(last_pair != NULL);
+        last_pair = pcmk__assert_alloc(1, sizeof(pcmk__attrd_query_pair_t));
 
         last_name = pcmk__lastfailure_name(rsc_id, task, interval_ms);
         last_pair->name = last_name;
@@ -313,18 +320,18 @@ get_cancel_action(const char *id, const char *node)
             const char *target = NULL;
             pcmk__graph_action_t *action = (pcmk__graph_action_t *) gIter2->data;
 
-            task = crm_element_value(action->xml, XML_LRM_ATTR_TASK);
+            task = crm_element_value(action->xml, PCMK_XA_OPERATION);
             if (!pcmk__str_eq(PCMK_ACTION_CANCEL, task, pcmk__str_casei)) {
                 continue;
             }
 
-            task = crm_element_value(action->xml, XML_LRM_ATTR_TASK_KEY);
+            task = crm_element_value(action->xml, PCMK__XA_OPERATION_KEY);
             if (!pcmk__str_eq(task, id, pcmk__str_casei)) {
                 crm_trace("Wrong key %s for %s on %s", task, id, node);
                 continue;
             }
 
-            target = crm_element_value(action->xml, XML_LRM_ATTR_TARGET_UUID);
+            target = crm_element_value(action->xml, PCMK__META_ON_NODE_UUID);
             if (node && !pcmk__str_eq(target, node, pcmk__str_casei)) {
                 crm_trace("Wrong node %s for %s on %s", target, id, node);
                 continue;
@@ -348,8 +355,8 @@ confirm_cancel_action(const char *id, const char *node_id)
     if (cancel == NULL) {
         return FALSE;
     }
-    op_key = crm_element_value(cancel->xml, XML_LRM_ATTR_TASK_KEY);
-    node_name = crm_element_value(cancel->xml, XML_LRM_ATTR_TARGET);
+    op_key = crm_element_value(cancel->xml, PCMK__XA_OPERATION_KEY);
+    node_name = crm_element_value(cancel->xml, PCMK__META_ON_NODE);
 
     stop_te_timer(cancel);
     te_action_confirmed(cancel, controld_globals.transition_graph);
@@ -360,8 +367,8 @@ confirm_cancel_action(const char *id, const char *node_id)
 }
 
 /* downed nodes are listed like: <downed> <node id="UUID1" /> ... </downed> */
-#define XPATH_DOWNED "//" XML_GRAPH_TAG_DOWNED \
-                     "/" XML_CIB_TAG_NODE "[@" XML_ATTR_ID "='%s']"
+#define XPATH_DOWNED "//" PCMK__XE_DOWNED \
+                     "/" PCMK_XE_NODE "[@" PCMK_XA_ID "='%s']"
 
 /*!
  * \brief Find a transition event that would have made a specified node down
@@ -405,7 +412,8 @@ match_down_event(const char *target)
 
     if (match != NULL) {
         crm_debug("Shutdown action %d (%s) found for node %s", match->id,
-                  crm_element_value(match->xml, XML_LRM_ATTR_TASK_KEY), target);
+                  crm_element_value(match->xml, PCMK__XA_OPERATION_KEY),
+                  target);
     } else {
         crm_debug("No reason to expect node %s to be down", target);
     }
@@ -434,20 +442,20 @@ process_graph_event(xmlNode *event, const char *event_node)
 <lrm_rsc_op id="rsc_east-05_last_0" operation_key="rsc_east-05_monitor_0" operation="monitor" crm-debug-origin="do_update_resource" crm_feature_set="3.0.6" transition-key="9:2:7:be2e97d9-05e2-439d-863e-48f7aecab2aa" transition-magic="0:7;9:2:7:be2e97d9-05e2-439d-863e-48f7aecab2aa" call-id="17" rc-code="7" op-status="0" interval="0" last-rc-change="1355361636" exec-time="128" queue-time="0" op-digest="c81f5f40b1c9e859c992e800b1aa6972"/>
 */
 
-    magic = crm_element_value(event, XML_ATTR_TRANSITION_KEY);
+    magic = crm_element_value(event, PCMK__XA_TRANSITION_KEY);
     if (magic == NULL) {
         /* non-change */
         return;
     }
 
-    crm_element_value_int(event, XML_LRM_ATTR_OPSTATUS, &status);
+    crm_element_value_int(event, PCMK__XA_OP_STATUS, &status);
     if (status == PCMK_EXEC_PENDING) {
         return;
     }
 
-    id = crm_element_value(event, XML_LRM_ATTR_TASK_KEY);
-    crm_element_value_int(event, XML_LRM_ATTR_RC, &rc);
-    crm_element_value_int(event, XML_LRM_ATTR_CALLID, &callid);
+    id = crm_element_value(event, PCMK__XA_OPERATION_KEY);
+    crm_element_value_int(event, PCMK__XA_RC_CODE, &rc);
+    crm_element_value_int(event, PCMK__XA_CALL_ID, &callid);
 
     rc = pcmk__effective_rc(rc);
 
@@ -456,7 +464,8 @@ process_graph_event(xmlNode *event, const char *event_node)
         // decode_transition_key() already logged the bad key
         crm_err("Can't process action %s result: Incompatible versions? "
                 CRM_XS " call-id=%d", id, callid);
-        abort_transition(INFINITY, pcmk__graph_restart, "Bad event", event);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Bad event", event);
         return;
     }
 
@@ -468,14 +477,15 @@ process_graph_event(xmlNode *event, const char *event_node)
             goto bail;
         }
         desc = "initiated outside of the cluster";
-        abort_transition(INFINITY, pcmk__graph_restart, "Unexpected event",
-                         event);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Unexpected event", event);
 
     } else if ((action_num < 0)
                || !pcmk__str_eq(update_te_uuid, controld_globals.te_uuid,
                                 pcmk__str_none)) {
         desc = "initiated by a different DC";
-        abort_transition(INFINITY, pcmk__graph_restart, "Foreign event", event);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Foreign event", event);
 
     } else if ((controld_globals.transition_graph->id != transition_num)
                || controld_globals.transition_graph->complete) {
@@ -496,16 +506,17 @@ process_graph_event(xmlNode *event, const char *event_node)
             }
 
             desc = "arrived after initial scheduling";
-            abort_transition(INFINITY, pcmk__graph_restart,
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                              "Change in recurring result", event);
 
         } else if (controld_globals.transition_graph->id != transition_num) {
             desc = "arrived really late";
-            abort_transition(INFINITY, pcmk__graph_restart, "Old event", event);
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                             "Old event", event);
         } else {
             desc = "arrived late";
-            abort_transition(INFINITY, pcmk__graph_restart, "Inactive graph",
-                             event);
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                             "Inactive graph", event);
         }
 
     } else {
@@ -515,8 +526,8 @@ process_graph_event(xmlNode *event, const char *event_node)
         if (action == NULL) {
             // Should never happen
             desc = "unknown";
-            abort_transition(INFINITY, pcmk__graph_restart, "Unknown event",
-                             event);
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                             "Unknown event", event);
 
         } else if (pcmk_is_set(action->flags, pcmk__graph_action_confirmed)) {
             /* Nothing further needs to be done if the action has already been
@@ -533,7 +544,8 @@ process_graph_event(xmlNode *event, const char *event_node)
              * (This is the only case where desc == NULL.)
              */
 
-            if (pcmk__str_eq(crm_meta_value(action->params, XML_OP_ATTR_ON_FAIL), "ignore", pcmk__str_casei)) {
+            if (pcmk__str_eq(crm_meta_value(action->params, PCMK_META_ON_FAIL),
+                             PCMK_VALUE_IGNORE, pcmk__str_casei)) {
                 ignore_failures = TRUE;
 
             } else if (rc != target_rc) {
@@ -553,7 +565,7 @@ process_graph_event(xmlNode *event, const char *event_node)
     if (id == NULL) {
         id = "unknown action";
     }
-    uname = crm_element_value(event, XML_LRM_ATTR_TARGET);
+    uname = crm_element_value(event, PCMK__META_ON_NODE);
     if (uname == NULL) {
         uname = "unknown node";
     }
diff --git a/daemons/controld/controld_te_utils.c b/daemons/controld/controld_te_utils.c
index 5a9f029..3e71209 100644
--- a/daemons/controld/controld_te_utils.c
+++ b/daemons/controld/controld_te_utils.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -9,7 +9,6 @@
 
 #include <crm_internal.h>
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 
 #include <pacemaker-controld.h>
@@ -192,8 +191,8 @@ node_pending_timer_popped(gpointer key)
         return FALSE;
     }
 
-    crm_warn("Node with id '%s' pending timed out (%us) on joining the process "
-             "group",
+    crm_warn("Node with " PCMK_XA_ID " '%s' pending timed out (%us) "
+             "on joining the process group",
              (const char *) key, controld_globals.node_pending_timeout);
 
     if (controld_globals.node_pending_timeout > 0) {
@@ -224,22 +223,19 @@ init_node_pending_timer(const crm_node_t *node, guint timeout)
         return;
     }
 
-    crm_notice("Waiting for pending %s with id '%s' to join the process "
-               "group (timeout=%us)",
+    crm_notice("Waiting for pending %s with " PCMK_XA_ID " '%s' "
+               "to join the process group (timeout=%us)",
                node->uname ? node->uname : "node", node->uuid,
                controld_globals.node_pending_timeout);
 
-    node_pending_timer = calloc(1, sizeof(struct abort_timer_s));
-    CRM_ASSERT(node_pending_timer != NULL);
+    key = pcmk__str_copy(node->uuid);
+    node_pending_timer = pcmk__assert_alloc(1, sizeof(struct abort_timer_s));
 
     node_pending_timer->aborted = FALSE;
-    node_pending_timer->priority = INFINITY;
+    node_pending_timer->priority = PCMK_SCORE_INFINITY;
     node_pending_timer->action = pcmk__graph_restart;
     node_pending_timer->text = "Node pending timed out";
 
-    key = strdup(node->uuid);
-    CRM_ASSERT(key != NULL);
-
     g_hash_table_replace(node_pending_timers, key, node_pending_timer);
 
     node_pending_timer->id = g_timeout_add_seconds(timeout,
@@ -264,8 +260,8 @@ controld_node_pending_timer(const crm_node_t *node)
     long long remaining_timeout = 0;
 
     /* If the node is not an active cluster node, is leaving the cluster, or is
-     * already part of CPG, or node-pending-timeout is disabled, free any
-     * node pending timer for it.
+     * already part of CPG, or PCMK_OPT_NODE_PENDING_TIMEOUT is disabled, free
+     * any node pending timer for it.
      */
     if (pcmk_is_set(node->flags, crm_remote_node)
         || (node->when_member <= 1) || (node->when_online > 0)
@@ -386,7 +382,7 @@ abort_transition_graph(int abort_priority, enum pcmk__graph_next abort_action,
         const xmlNode *search = NULL;
 
         for(search = reason; search; search = search->parent) {
-            if (pcmk__xe_is(search, XML_TAG_DIFF)) {
+            if (pcmk__xe_is(search, PCMK_XE_DIFF)) {
                 diff = search;
                 break;
             }
@@ -395,7 +391,7 @@ abort_transition_graph(int abort_priority, enum pcmk__graph_next abort_action,
         if(diff) {
             xml_patch_versions(diff, add, del);
             for(search = reason; search; search = search->parent) {
-                if (pcmk__xe_is(search, XML_DIFF_CHANGE)) {
+                if (pcmk__xe_is(search, PCMK_XE_CHANGE)) {
                     change = search;
                     break;
                 }
@@ -417,21 +413,22 @@ abort_transition_graph(int abort_priority, enum pcmk__graph_next abort_action,
         do_crm_log(level, "Transition %d aborted by %s.%s: %s "
                    CRM_XS " cib=%d.%d.%d source=%s:%d path=%s complete=%s",
                    controld_globals.transition_graph->id, reason->name,
-                   ID(reason), abort_text, add[0], add[1], add[2], fn, line,
-                   (const char *) local_path->str,
+                   pcmk__xe_id(reason), abort_text, add[0], add[1], add[2], fn,
+                   line, (const char *) local_path->str,
                    pcmk__btoa(controld_globals.transition_graph->complete));
         g_string_free(local_path, TRUE);
 
     } else {
-        const char *op = crm_element_value(change, XML_DIFF_OP);
-        const char *path = crm_element_value(change, XML_DIFF_PATH);
+        const char *op = crm_element_value(change, PCMK_XA_OPERATION);
+        const char *path = crm_element_value(change, PCMK_XA_PATH);
 
         if(change == reason) {
-            if(strcmp(op, "create") == 0) {
+            if (strcmp(op, PCMK_VALUE_CREATE) == 0) {
                 reason = reason->children;
 
-            } else if(strcmp(op, "modify") == 0) {
-                reason = first_named_child(reason, XML_DIFF_RESULT);
+            } else if (strcmp(op, PCMK_VALUE_MODIFY) == 0) {
+                reason = pcmk__xe_first_child(reason, PCMK_XE_CHANGE_RESULT,
+                                              NULL, NULL);
                 if(reason) {
                     reason = reason->children;
                 }
@@ -439,7 +436,7 @@ abort_transition_graph(int abort_priority, enum pcmk__graph_next abort_action,
             CRM_CHECK(reason != NULL, goto done);
         }
 
-        if(strcmp(op, "delete") == 0) {
+        if (strcmp(op, PCMK_VALUE_DELETE) == 0) {
             const char *shortpath = strrchr(path, '/');
 
             do_crm_log(level, "Transition %d aborted by deletion of %s: %s "
@@ -449,40 +446,42 @@ abort_transition_graph(int abort_priority, enum pcmk__graph_next abort_action,
                        add[0], add[1], add[2], fn, line, path,
                        pcmk__btoa(controld_globals.transition_graph->complete));
 
-        } else if (pcmk__xe_is(reason, XML_CIB_TAG_NVPAIR)) {
+        } else if (pcmk__xe_is(reason, PCMK_XE_NVPAIR)) {
             do_crm_log(level, "Transition %d aborted by %s doing %s %s=%s: %s "
                        CRM_XS " cib=%d.%d.%d source=%s:%d path=%s complete=%s",
                        controld_globals.transition_graph->id,
-                       crm_element_value(reason, XML_ATTR_ID), op,
-                       crm_element_value(reason, XML_NVPAIR_ATTR_NAME),
-                       crm_element_value(reason, XML_NVPAIR_ATTR_VALUE),
+                       crm_element_value(reason, PCMK_XA_ID), op,
+                       crm_element_value(reason, PCMK_XA_NAME),
+                       crm_element_value(reason, PCMK_XA_VALUE),
                        abort_text, add[0], add[1], add[2], fn, line, path,
                        pcmk__btoa(controld_globals.transition_graph->complete));
 
-        } else if (pcmk__xe_is(reason, XML_LRM_TAG_RSC_OP)) {
-            const char *magic = crm_element_value(reason, XML_ATTR_TRANSITION_MAGIC);
+        } else if (pcmk__xe_is(reason, PCMK__XE_LRM_RSC_OP)) {
+            const char *magic = crm_element_value(reason,
+                                                  PCMK__XA_TRANSITION_MAGIC);
 
             do_crm_log(level, "Transition %d aborted by operation %s '%s' on %s: %s "
                        CRM_XS " magic=%s cib=%d.%d.%d source=%s:%d complete=%s",
                        controld_globals.transition_graph->id,
-                       crm_element_value(reason, XML_LRM_ATTR_TASK_KEY), op,
-                       crm_element_value(reason, XML_LRM_ATTR_TARGET), abort_text,
+                       crm_element_value(reason, PCMK__XA_OPERATION_KEY), op,
+                       crm_element_value(reason, PCMK__META_ON_NODE),
+                       abort_text,
                        magic, add[0], add[1], add[2], fn, line,
                        pcmk__btoa(controld_globals.transition_graph->complete));
 
         } else if (pcmk__str_any_of((const char *) reason->name,
-                   XML_CIB_TAG_STATE, XML_CIB_TAG_NODE, NULL)) {
-            const char *uname = crm_peer_uname(ID(reason));
+                   PCMK__XE_NODE_STATE, PCMK_XE_NODE, NULL)) {
+            const char *uname = pcmk__node_name_from_uuid(pcmk__xe_id(reason));
 
             do_crm_log(level, "Transition %d aborted by %s '%s' on %s: %s "
                        CRM_XS " cib=%d.%d.%d source=%s:%d complete=%s",
                        controld_globals.transition_graph->id,
-                       reason->name, op, pcmk__s(uname, ID(reason)),
+                       reason->name, op, pcmk__s(uname, pcmk__xe_id(reason)),
                        abort_text, add[0], add[1], add[2], fn, line,
                        pcmk__btoa(controld_globals.transition_graph->complete));
 
         } else {
-            const char *id = ID(reason);
+            const char *id = pcmk__xe_id(reason);
 
             do_crm_log(level, "Transition %d aborted by %s.%s '%s': %s "
                        CRM_XS " cib=%d.%d.%d source=%s:%d path=%s complete=%s",
diff --git a/daemons/controld/controld_throttle.c b/daemons/controld/controld_throttle.c
index a4775e5..08ec329 100644
--- a/daemons/controld/controld_throttle.c
+++ b/daemons/controld/controld_throttle.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2021 the Pacemaker project contributors
+ * Copyright 2013-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -17,7 +17,7 @@
 #include <dirent.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 #include <crm/cluster.h>
 
 #include <pacemaker-controld.h>
@@ -160,7 +160,7 @@ throttle_cib_load(float *load)
     }
 
     if(fgets(buffer, sizeof(buffer), stream)) {
-        char *comm = calloc(1, 256);
+        char *comm = pcmk__assert_alloc(1, 256);
         char state = 0;
         int rc = 0, pid = 0, ppid = 0, pgrp = 0, session = 0, tty_nr = 0, tpgid = 0;
         unsigned long flags = 0, minflt = 0, cminflt = 0, majflt = 0, cmajflt = 0, utime = 0, stime = 0;
@@ -368,10 +368,10 @@ throttle_send_command(enum throttle_state_e mode)
         last = mode;
 
         xml = create_request(CRM_OP_THROTTLE, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL);
-        crm_xml_add_int(xml, F_CRM_THROTTLE_MODE, mode);
-        crm_xml_add_int(xml, F_CRM_THROTTLE_MAX, throttle_job_max);
+        crm_xml_add_int(xml, PCMK__XA_CRM_LIMIT_MODE, mode);
+        crm_xml_add_int(xml, PCMK__XA_CRM_LIMIT_MAX, throttle_job_max);
 
-        send_cluster_message(NULL, crm_msg_crmd, xml, TRUE);
+        pcmk__cluster_send_message(NULL, crm_msg_crmd, xml);
         free_xml(xml);
     }
 }
@@ -401,7 +401,8 @@ throttle_set_load_target(float target)
  * \internal
  * \brief Update the maximum number of simultaneous jobs
  *
- * \param[in] preference  Cluster-wide node-action-limit from the CIB
+ * \param[in] preference  Cluster-wide \c PCMK_OPT_NODE_ACTION_LIMIT from the
+ *                        CIB
  */
 static void
 throttle_update_job_max(const char *preference)
@@ -416,7 +417,7 @@ throttle_update_job_max(const char *preference)
         pcmk__scan_ll(preference, &max, 0LL);
     }
     if (max > 0) {
-        throttle_job_max = (int) max;
+        throttle_job_max = (max >= INT_MAX)? INT_MAX : (int) max;
     } else {
         // Default is based on the number of cores detected
         throttle_job_max = 2 * pcmk__procfs_num_cores();
@@ -444,13 +445,13 @@ throttle_init(void)
 void
 controld_configure_throttle(GHashTable *options)
 {
-    const char *value = g_hash_table_lookup(options, "load-threshold");
+    const char *value = g_hash_table_lookup(options, PCMK_OPT_LOAD_THRESHOLD);
 
     if (value != NULL) {
         throttle_set_load_target(strtof(value, NULL) / 100.0);
     }
 
-    value = g_hash_table_lookup(options, "node-action-limit");
+    value = g_hash_table_lookup(options, PCMK_OPT_NODE_ACTION_LIMIT);
     throttle_update_job_max(value);
 }
 
@@ -473,7 +474,7 @@ throttle_get_total_job_limit(int l)
     /* Cluster-wide limit */
     GHashTableIter iter;
     int limit = l;
-    int peers = crm_active_peers();
+    int peers = pcmk__cluster_num_active_nodes();
     struct throttle_record_s *r = NULL;
 
     g_hash_table_iter_init(&iter, throttle_records);
@@ -497,13 +498,12 @@ throttle_get_total_job_limit(int l)
         }
     }
     if(limit == l) {
-        /* crm_trace("No change to batch-limit=%d", limit); */
 
     } else if(l == 0) {
-        crm_trace("Using batch-limit=%d", limit);
+        crm_trace("Using " PCMK_OPT_BATCH_LIMIT "=%d", limit);
 
     } else {
-        crm_trace("Using batch-limit=%d instead of %d", limit, l);
+        crm_trace("Using " PCMK_OPT_BATCH_LIMIT "=%d instead of %d", limit, l);
     }
     return limit;
 }
@@ -516,8 +516,8 @@ throttle_get_job_limit(const char *node)
 
     r = g_hash_table_lookup(throttle_records, node);
     if(r == NULL) {
-        r = calloc(1, sizeof(struct throttle_record_s));
-        r->node = strdup(node);
+        r = pcmk__assert_alloc(1, sizeof(struct throttle_record_s));
+        r->node = pcmk__str_copy(node);
         r->mode = throttle_low;
         r->max = throttle_job_max;
         crm_trace("Defaulting to local values for unknown node %s", node);
@@ -552,16 +552,16 @@ throttle_update(xmlNode *xml)
     int max = 0;
     int mode = 0;
     struct throttle_record_s *r = NULL;
-    const char *from = crm_element_value(xml, F_CRM_HOST_FROM);
+    const char *from = crm_element_value(xml, PCMK__XA_SRC);
 
-    crm_element_value_int(xml, F_CRM_THROTTLE_MODE, &mode);
-    crm_element_value_int(xml, F_CRM_THROTTLE_MAX, &max);
+    crm_element_value_int(xml, PCMK__XA_CRM_LIMIT_MODE, &mode);
+    crm_element_value_int(xml, PCMK__XA_CRM_LIMIT_MAX, &max);
 
     r = g_hash_table_lookup(throttle_records, from);
 
     if(r == NULL) {
-        r = calloc(1, sizeof(struct throttle_record_s));
-        r->node = strdup(from);
+        r = pcmk__assert_alloc(1, sizeof(struct throttle_record_s));
+        r->node = pcmk__str_copy(from);
         g_hash_table_insert(throttle_records, r->node, r);
     }
 
diff --git a/daemons/controld/controld_timers.c b/daemons/controld/controld_timers.c
index a65bef5..0d387b9 100644
--- a/daemons/controld/controld_timers.c
+++ b/daemons/controld/controld_timers.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2022 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -13,7 +13,7 @@
 #include <stdlib.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 #include <pacemaker-controld.h>
 
 //! FSA mainloop timer type
@@ -38,10 +38,10 @@ static fsa_timer_t *election_timer = NULL;
 //! Delay start of new transition with expectation something else might happen
 static fsa_timer_t *transition_timer = NULL;
 
-//! join-integration-timeout
+//! \c PCMK_OPT_JOIN_INTEGRATION_TIMEOUT
 static fsa_timer_t *integration_timer = NULL;
 
-//! join-finalization-timeout
+//! \c PCMK_OPT_JOIN_FINALIZATION_TIMEOUT
 static fsa_timer_t *finalization_timer = NULL;
 
 // Wait for DC to stop all resources and give us the all-clear to shut down
@@ -229,40 +229,13 @@ crm_timer_popped(gpointer data)
 bool
 controld_init_fsa_timers(void)
 {
-    transition_timer = calloc(1, sizeof(fsa_timer_t));
-    if (transition_timer == NULL) {
-        return FALSE;
-    }
-
-    integration_timer = calloc(1, sizeof(fsa_timer_t));
-    if (integration_timer == NULL) {
-        return FALSE;
-    }
-
-    finalization_timer = calloc(1, sizeof(fsa_timer_t));
-    if (finalization_timer == NULL) {
-        return FALSE;
-    }
-
-    election_timer = calloc(1, sizeof(fsa_timer_t));
-    if (election_timer == NULL) {
-        return FALSE;
-    }
-
-    shutdown_escalation_timer = calloc(1, sizeof(fsa_timer_t));
-    if (shutdown_escalation_timer == NULL) {
-        return FALSE;
-    }
-
-    wait_timer = calloc(1, sizeof(fsa_timer_t));
-    if (wait_timer == NULL) {
-        return FALSE;
-    }
-
-    recheck_timer = calloc(1, sizeof(fsa_timer_t));
-    if (recheck_timer == NULL) {
-        return FALSE;
-    }
+    transition_timer = pcmk__assert_alloc(1, sizeof(fsa_timer_t));
+    integration_timer = pcmk__assert_alloc(1, sizeof(fsa_timer_t));
+    finalization_timer = pcmk__assert_alloc(1, sizeof(fsa_timer_t));
+    election_timer = pcmk__assert_alloc(1, sizeof(fsa_timer_t));
+    shutdown_escalation_timer = pcmk__assert_alloc(1, sizeof(fsa_timer_t));
+    wait_timer = pcmk__assert_alloc(1, sizeof(fsa_timer_t));
+    recheck_timer = pcmk__assert_alloc(1, sizeof(fsa_timer_t));
 
     election_timer->source_id = 0;
     election_timer->period_ms = 0;
@@ -332,30 +305,30 @@ controld_configure_fsa_timers(GHashTable *options)
     const char *value = NULL;
 
     // Election timer
-    value = g_hash_table_lookup(options, XML_CONFIG_ATTR_DC_DEADTIME);
-    election_timer->period_ms = crm_parse_interval_spec(value);
+    value = g_hash_table_lookup(options, PCMK_OPT_DC_DEADTIME);
+    pcmk_parse_interval_spec(value, &(election_timer->period_ms));
 
     // Integration timer
-    value = g_hash_table_lookup(options, "join-integration-timeout");
-    integration_timer->period_ms = crm_parse_interval_spec(value);
+    value = g_hash_table_lookup(options, PCMK_OPT_JOIN_INTEGRATION_TIMEOUT);
+    pcmk_parse_interval_spec(value, &(integration_timer->period_ms));
 
     // Finalization timer
-    value = g_hash_table_lookup(options, "join-finalization-timeout");
-    finalization_timer->period_ms = crm_parse_interval_spec(value);
+    value = g_hash_table_lookup(options, PCMK_OPT_JOIN_FINALIZATION_TIMEOUT);
+    pcmk_parse_interval_spec(value, &(finalization_timer->period_ms));
 
     // Shutdown escalation timer
-    value = g_hash_table_lookup(options, XML_CONFIG_ATTR_FORCE_QUIT);
-    shutdown_escalation_timer->period_ms = crm_parse_interval_spec(value);
+    value = g_hash_table_lookup(options, PCMK_OPT_SHUTDOWN_ESCALATION);
+    pcmk_parse_interval_spec(value, &(shutdown_escalation_timer->period_ms));
     crm_debug("Shutdown escalation occurs if DC has not responded to request "
               "in %ums", shutdown_escalation_timer->period_ms);
 
     // Transition timer
-    value = g_hash_table_lookup(options, "transition-delay");
-    transition_timer->period_ms = crm_parse_interval_spec(value);
+    value = g_hash_table_lookup(options, PCMK_OPT_TRANSITION_DELAY);
+    pcmk_parse_interval_spec(value, &(transition_timer->period_ms));
 
     // Recheck interval
-    value = g_hash_table_lookup(options, XML_CONFIG_ATTR_RECHECK);
-    recheck_interval_ms = crm_parse_interval_spec(value);
+    value = g_hash_table_lookup(options, PCMK_OPT_CLUSTER_RECHECK_INTERVAL);
+    pcmk_parse_interval_spec(value, &recheck_interval_ms);
     crm_debug("Re-run scheduler after %dms of inactivity", recheck_interval_ms);
 }
 
diff --git a/daemons/controld/controld_transition.c b/daemons/controld/controld_transition.c
index 897c6d3..184253d 100644
--- a/daemons/controld/controld_transition.c
+++ b/daemons/controld/controld_transition.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -10,7 +10,6 @@
 #include <crm_internal.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 
 #include <pacemaker-controld.h>
@@ -41,7 +40,8 @@ do_te_control(long long action,
         controld_globals.transition_graph = NULL;
 
         if (cib_conn != NULL) {
-            cib_conn->cmds->del_notify_callback(cib_conn, T_CIB_DIFF_NOTIFY,
+            cib_conn->cmds->del_notify_callback(cib_conn,
+                                                PCMK__VALUE_CIB_DIFF_NOTIFY,
                                                 te_update_diff);
         }
 
@@ -71,12 +71,11 @@ do_te_control(long long action,
         crm_err("Could not set CIB callbacks");
         init_ok = FALSE;
 
-    } else {
-        if (cib_conn->cmds->add_notify_callback(cib_conn, T_CIB_DIFF_NOTIFY,
-                                                te_update_diff) != pcmk_ok) {
-            crm_err("Could not set CIB notification callback");
-            init_ok = FALSE;
-        }
+    } else if (cib_conn->cmds->add_notify_callback(cib_conn,
+                                                   PCMK__VALUE_CIB_DIFF_NOTIFY,
+                                                   te_update_diff) != pcmk_ok) {
+        crm_err("Could not set CIB notification callback");
+        init_ok = FALSE;
     }
 
     if (init_ok) {
@@ -110,13 +109,15 @@ do_te_invoke(long long action,
     if (action & A_TE_CANCEL) {
         crm_debug("Cancelling the transition: %sactive",
                   controld_globals.transition_graph->complete? "in" : "");
-        abort_transition(INFINITY, pcmk__graph_restart, "Peer Cancelled", NULL);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                         "Peer Cancelled", NULL);
         if (!controld_globals.transition_graph->complete) {
             crmd_fsa_stall(FALSE);
         }
 
     } else if (action & A_TE_HALT) {
-        abort_transition(INFINITY, pcmk__graph_wait, "Peer Halt", NULL);
+        abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_wait, "Peer Halt",
+                         NULL);
         if (!controld_globals.transition_graph->complete) {
             crmd_fsa_stall(FALSE);
         }
@@ -124,11 +125,11 @@ do_te_invoke(long long action,
     } else if (action & A_TE_INVOKE) {
         ha_msg_input_t *input = fsa_typed_data(fsa_dt_ha_msg);
         xmlNode *graph_data = input->xml;
-        const char *ref = crm_element_value(input->msg, XML_ATTR_REFERENCE);
-        const char *graph_file = crm_element_value(input->msg, F_CRM_TGRAPH);
-        const char *graph_input = crm_element_value(input->msg, F_CRM_TGRAPH_INPUT);
+        const char *ref = crm_element_value(input->msg, PCMK_XA_REFERENCE);
+        const char *graph_input = crm_element_value(input->msg,
+                                                    PCMK__XA_CRM_TGRAPH_IN);
 
-        if (graph_file == NULL && graph_data == NULL) {
+        if (graph_data == NULL) {
             crm_log_xml_err(input->msg, "Bad command");
             register_fsa_error(C_FSA_INTERNAL, I_FAIL, NULL);
             return;
@@ -136,8 +137,8 @@ do_te_invoke(long long action,
 
         if (!controld_globals.transition_graph->complete) {
             crm_info("Another transition is already active");
-            abort_transition(INFINITY, pcmk__graph_restart, "Transition Active",
-                             NULL);
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
+                             "Transition Active", NULL);
             return;
         }
 
@@ -147,14 +148,10 @@ do_te_invoke(long long action,
             crm_info("Transition is redundant: %s expected but %s received",
                      pcmk__s(controld_globals.fsa_pe_ref, "no reference"),
                      pcmk__s(ref, "no reference"));
-            abort_transition(INFINITY, pcmk__graph_restart,
+            abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart,
                              "Transition Redundant", NULL);
         }
 
-        if (graph_data == NULL && graph_file != NULL) {
-            graph_data = filename2xml(graph_file);
-        }
-
         if (controld_is_started_transition_timer()) {
             crm_debug("The transitioner wait for a transition timer");
             return;
diff --git a/daemons/controld/controld_utils.c b/daemons/controld/controld_utils.c
index 9b306ee..fc0a8fd 100644
--- a/daemons/controld/controld_utils.c
+++ b/daemons/controld/controld_utils.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,6 @@
 
 #include <crm/crm.h>
 #include <crm/cib.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 
 #include <pacemaker-controld.h>
@@ -694,8 +693,8 @@ update_dc(xmlNode * msg)
     if (msg != NULL) {
         gboolean invalid = FALSE;
 
-        dc_version = crm_element_value(msg, F_CRM_VERSION);
-        welcome_from = crm_element_value(msg, F_CRM_HOST_FROM);
+        dc_version = crm_element_value(msg, PCMK_XA_VERSION);
+        welcome_from = crm_element_value(msg, PCMK__XA_SRC);
 
         CRM_CHECK(dc_version != NULL, return FALSE);
         CRM_CHECK(welcome_from != NULL, return FALSE);
@@ -734,7 +733,8 @@ update_dc(xmlNode * msg)
         /* do nothing */
 
     } else if (controld_globals.dc_name != NULL) {
-        crm_node_t *dc_node = crm_get_peer(0, controld_globals.dc_name);
+        crm_node_t *dc_node = pcmk__get_node(0, controld_globals.dc_name, NULL,
+                                             pcmk__node_search_cluster_member);
 
         crm_info("Set DC to %s (%s)",
                  controld_globals.dc_name,
@@ -828,10 +828,10 @@ get_node_id(xmlNode *lrm_rsc_op)
 {
     xmlNode *node = lrm_rsc_op;
 
-    while ((node != NULL) && !pcmk__xe_is(node, XML_CIB_TAG_STATE)) {
+    while ((node != NULL) && !pcmk__xe_is(node, PCMK__XE_NODE_STATE)) {
         node = node->parent;
     }
 
     CRM_CHECK(node != NULL, return NULL);
-    return ID(node);
+    return pcmk__xe_id(node);
 }
diff --git a/daemons/controld/pacemaker-controld.c b/daemons/controld/pacemaker-controld.c
index e4a72c2..913518b 100644
--- a/daemons/controld/pacemaker-controld.c
+++ b/daemons/controld/pacemaker-controld.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -46,11 +46,23 @@ static pcmk__supported_format_t formats[] = {
     { NULL, NULL, NULL }
 };
 
+/* @COMPAT Deprecated since 2.1.8. Use pcmk_list_cluster_options() or
+ * crm_attribute --list-options=cluster instead of querying daemon metadata.
+ */
+static int
+controld_metadata(pcmk__output_t *out)
+{
+    return pcmk__daemon_metadata(out, "pacemaker-controld",
+                                 "Pacemaker controller options",
+                                 "Cluster options used by Pacemaker's "
+                                 "controller",
+                                 pcmk__opt_controld);
+}
+
 static GOptionContext *
 build_arg_context(pcmk__common_args_t *args, GOptionGroup **group)
 {
-    return pcmk__build_arg_context(args, "text (default), xml", group,
-                                   "[metadata]");
+    return pcmk__build_arg_context(args, "text (default), xml", group, NULL);
 }
 
 int
@@ -96,8 +108,14 @@ main(int argc, char **argv)
 
     if ((g_strv_length(processed_args) >= 2)
         && pcmk__str_eq(processed_args[1], "metadata", pcmk__str_none)) {
-        crmd_metadata();
+
         initialize = false;
+        rc = controld_metadata(out);
+        if (rc != pcmk_rc_ok) {
+            exit_code = CRM_EX_FATAL;
+            g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
+                        "Unable to display metadata: %s", pcmk_rc_str(rc));
+        }
         goto done;
     }
 
@@ -178,7 +196,7 @@ crmd_init(void)
     init_dotfile();
     register_fsa_input(C_STARTUP, I_STARTUP, NULL);
 
-    crm_peer_init();
+    pcmk__cluster_init_node_caches();
     state = s_crmd_fsa(C_STARTUP);
 
     if (state == S_PENDING || state == S_STARTING) {
diff --git a/daemons/controld/pacemaker-controld.h b/daemons/controld/pacemaker-controld.h
index 2334cce..ba8dc8f 100644
--- a/daemons/controld/pacemaker-controld.h
+++ b/daemons/controld/pacemaker-controld.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -28,7 +28,6 @@
 #  define controld_trigger_config()  \
     controld_trigger_config_as(__func__, __LINE__)
 
-void crmd_metadata(void);
 void controld_trigger_config_as(const char *fn, int line);
 void controld_election_init(const char *uname);
 void controld_configure_election(GHashTable *options);
diff --git a/daemons/execd/Makefile.am b/daemons/execd/Makefile.am
index ab8544f..ce0e161 100644
--- a/daemons/execd/Makefile.am
+++ b/daemons/execd/Makefile.am
@@ -44,12 +44,14 @@ pacemaker_remoted_LDFLAGS	= $(LDFLAGS_HARDENED_EXE)
 
 pacemaker_remoted_LDADD = $(top_builddir)/lib/fencing/libstonithd.la
 pacemaker_remoted_LDADD	+= $(top_builddir)/lib/services/libcrmservice.la
+pacemaker_remoted_LDADD += $(top_builddir)/lib/cib/libcib.la
 pacemaker_remoted_LDADD += $(top_builddir)/lib/lrmd/liblrmd.la
 pacemaker_remoted_LDADD += $(top_builddir)/lib/common/libcrmcommon.la
 pacemaker_remoted_SOURCES	= $(pacemaker_execd_SOURCES) 	\
 				  remoted_tls.c 		\
 				  remoted_pidone.c 		\
-				  remoted_proxy.c
+				  remoted_proxy.c 		\
+				  remoted_schemas.c
 endif
 
 cts_exec_helper_LDADD = $(top_builddir)/lib/pengine/libpe_status.la
diff --git a/daemons/execd/cts-exec-helper.c b/daemons/execd/cts-exec-helper.c
index 6ebbedf..b8f4407 100644
--- a/daemons/execd/cts-exec-helper.c
+++ b/daemons/execd/cts-exec-helper.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the Pacemaker project contributors
+ * Copyright 2012-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -56,8 +56,8 @@ static struct {
 
 static gboolean
 interval_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **error) {
-    options.interval_ms = crm_parse_interval_spec(optarg);
-    return errno == 0;
+    return pcmk_parse_interval_spec(optarg,
+                                    &options.interval_ms) == pcmk_rc_ok;
 }
 
 static gboolean
@@ -461,9 +461,9 @@ generate_params(void)
     if (rc != pcmk_rc_ok) {
         return rc;
     }
-    if (!cli_config_update(&cib_xml_copy, NULL, FALSE)) {
-        crm_err("Could not update CIB");
-        return pcmk_rc_cib_corrupt;
+    rc = pcmk_update_configured_schema(&cib_xml_copy, false);
+    if (rc != pcmk_rc_ok) {
+        return rc;
     }
 
     // Calculate cluster status
@@ -472,7 +472,7 @@ generate_params(void)
         crm_crit("Could not allocate scheduler data");
         return ENOMEM;
     }
-    pe__set_working_set_flags(scheduler,
+    pcmk__set_scheduler_flags(scheduler,
                               pcmk_sched_no_counts|pcmk_sched_no_compat);
     scheduler->input = cib_xml_copy;
     scheduler->now = crm_time_new(NULL);
diff --git a/daemons/execd/execd_alerts.c b/daemons/execd/execd_alerts.c
index 5944d93..362f7a5 100644
--- a/daemons/execd/execd_alerts.c
+++ b/daemons/execd/execd_alerts.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2022 the Pacemaker project contributors
+ * Copyright 2016-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -17,7 +17,7 @@
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_internal.h>
 #include <crm/common/alerts_internal.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 
 #include "pacemaker-execd.h"
 
@@ -105,9 +105,11 @@ process_lrmd_alert_exec(pcmk__client_t *client, uint32_t id, xmlNode *request)
 {
     static int alert_sequence_no = 0;
 
-    xmlNode *alert_xml = get_xpath_object("//" F_LRMD_ALERT, request, LOG_ERR);
-    const char *alert_id = crm_element_value(alert_xml, F_LRMD_ALERT_ID);
-    const char *alert_path = crm_element_value(alert_xml, F_LRMD_ALERT_PATH);
+    xmlNode *alert_xml = get_xpath_object("//" PCMK__XE_LRMD_ALERT, request,
+                                          LOG_ERR);
+    const char *alert_id = crm_element_value(alert_xml, PCMK__XA_LRMD_ALERT_ID);
+    const char *alert_path = crm_element_value(alert_xml,
+                                               PCMK__XA_LRMD_ALERT_PATH);
     svc_action_t *action = NULL;
     int alert_timeout = 0;
     int rc = pcmk_ok;
@@ -116,13 +118,14 @@ process_lrmd_alert_exec(pcmk__client_t *client, uint32_t id, xmlNode *request)
 
     if ((alert_id == NULL) || (alert_path == NULL) ||
         (client == NULL) || (client->id == NULL)) { /* hint static analyzer */
-        return -EINVAL;
+        rc = -EINVAL;
+        goto err;
     }
     if (draining_alerts) {
         return pcmk_ok;
     }
 
-    crm_element_value_int(alert_xml, F_LRMD_TIMEOUT, &alert_timeout);
+    crm_element_value_int(alert_xml, PCMK__XA_LRMD_TIMEOUT, &alert_timeout);
 
     crm_info("Executing alert %s for %s", alert_id, client->id);
 
@@ -130,20 +133,11 @@ process_lrmd_alert_exec(pcmk__client_t *client, uint32_t id, xmlNode *request)
     pcmk__add_alert_key_int(params, PCMK__alert_key_node_sequence,
                             ++alert_sequence_no);
 
-    cb_data = calloc(1, sizeof(struct alert_cb_s));
-    if (cb_data == NULL) {
-        rc = -errno;
-        goto err;
-    }
+    cb_data = pcmk__assert_alloc(1, sizeof(struct alert_cb_s));
 
-    /* coverity[deref_ptr] False Positive */
-    cb_data->client_id = strdup(client->id);
-    if (cb_data->client_id == NULL) {
-        rc = -errno;
-        goto err;
-    }
+    cb_data->client_id = pcmk__str_copy(client->id);
 
-    crm_element_value_int(request, F_LRMD_CALLID, &(cb_data->call_id));
+    crm_element_value_int(request, PCMK__XA_LRMD_CALLID, &(cb_data->call_id));
 
     action = services_alert_create(alert_id, alert_path, alert_timeout, params,
                                    alert_sequence_no, cb_data);
@@ -165,9 +159,7 @@ process_lrmd_alert_exec(pcmk__client_t *client, uint32_t id, xmlNode *request)
 
 err:
     if (cb_data) {
-        if (cb_data->client_id) {
-            free(cb_data->client_id);
-        }
+        free(cb_data->client_id);
         free(cb_data);
     }
     services_action_free(action);
diff --git a/daemons/execd/execd_commands.c b/daemons/execd/execd_commands.c
index cf4503a..6b1ded1 100644
--- a/daemons/execd/execd_commands.c
+++ b/daemons/execd/execd_commands.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the Pacemaker project contributors
+ * Copyright 2012-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -28,7 +28,7 @@
 #include <crm/common/mainloop.h>
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_internal.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 
 #include "pacemaker-execd.h"
 
@@ -274,17 +274,17 @@ normalize_action_name(lrmd_rsc_t * rsc, const char *action)
 static lrmd_rsc_t *
 build_rsc_from_xml(xmlNode * msg)
 {
-    xmlNode *rsc_xml = get_xpath_object("//" F_LRMD_RSC, msg, LOG_ERR);
+    xmlNode *rsc_xml = get_xpath_object("//" PCMK__XE_LRMD_RSC, msg, LOG_ERR);
     lrmd_rsc_t *rsc = NULL;
 
-    rsc = calloc(1, sizeof(lrmd_rsc_t));
+    rsc = pcmk__assert_alloc(1, sizeof(lrmd_rsc_t));
 
-    crm_element_value_int(msg, F_LRMD_CALLOPTS, &rsc->call_opts);
+    crm_element_value_int(msg, PCMK__XA_LRMD_CALLOPT, &rsc->call_opts);
 
-    rsc->rsc_id = crm_element_value_copy(rsc_xml, F_LRMD_RSC_ID);
-    rsc->class = crm_element_value_copy(rsc_xml, F_LRMD_CLASS);
-    rsc->provider = crm_element_value_copy(rsc_xml, F_LRMD_PROVIDER);
-    rsc->type = crm_element_value_copy(rsc_xml, F_LRMD_TYPE);
+    rsc->rsc_id = crm_element_value_copy(rsc_xml, PCMK__XA_LRMD_RSC_ID);
+    rsc->class = crm_element_value_copy(rsc_xml, PCMK__XA_LRMD_CLASS);
+    rsc->provider = crm_element_value_copy(rsc_xml, PCMK__XA_LRMD_PROVIDER);
+    rsc->type = crm_element_value_copy(rsc_xml, PCMK__XA_LRMD_TYPE);
     rsc->work = mainloop_add_trigger(G_PRIORITY_HIGH, execute_resource_action,
                                      rsc);
 
@@ -298,29 +298,33 @@ static lrmd_cmd_t *
 create_lrmd_cmd(xmlNode *msg, pcmk__client_t *client)
 {
     int call_options = 0;
-    xmlNode *rsc_xml = get_xpath_object("//" F_LRMD_RSC, msg, LOG_ERR);
+    xmlNode *rsc_xml = get_xpath_object("//" PCMK__XE_LRMD_RSC, msg, LOG_ERR);
     lrmd_cmd_t *cmd = NULL;
 
-    cmd = calloc(1, sizeof(lrmd_cmd_t));
+    cmd = pcmk__assert_alloc(1, sizeof(lrmd_cmd_t));
 
-    crm_element_value_int(msg, F_LRMD_CALLOPTS, &call_options);
+    crm_element_value_int(msg, PCMK__XA_LRMD_CALLOPT, &call_options);
     cmd->call_opts = call_options;
-    cmd->client_id = strdup(client->id);
-
-    crm_element_value_int(msg, F_LRMD_CALLID, &cmd->call_id);
-    crm_element_value_ms(rsc_xml, F_LRMD_RSC_INTERVAL, &cmd->interval_ms);
-    crm_element_value_int(rsc_xml, F_LRMD_TIMEOUT, &cmd->timeout);
-    crm_element_value_int(rsc_xml, F_LRMD_RSC_START_DELAY, &cmd->start_delay);
+    cmd->client_id = pcmk__str_copy(client->id);
+
+    crm_element_value_int(msg, PCMK__XA_LRMD_CALLID, &cmd->call_id);
+    crm_element_value_ms(rsc_xml, PCMK__XA_LRMD_RSC_INTERVAL,
+                         &cmd->interval_ms);
+    crm_element_value_int(rsc_xml, PCMK__XA_LRMD_TIMEOUT, &cmd->timeout);
+    crm_element_value_int(rsc_xml, PCMK__XA_LRMD_RSC_START_DELAY,
+                          &cmd->start_delay);
     cmd->timeout_orig = cmd->timeout;
 
-    cmd->origin = crm_element_value_copy(rsc_xml, F_LRMD_ORIGIN);
-    cmd->action = crm_element_value_copy(rsc_xml, F_LRMD_RSC_ACTION);
-    cmd->userdata_str = crm_element_value_copy(rsc_xml, F_LRMD_RSC_USERDATA_STR);
-    cmd->rsc_id = crm_element_value_copy(rsc_xml, F_LRMD_RSC_ID);
+    cmd->origin = crm_element_value_copy(rsc_xml, PCMK__XA_LRMD_ORIGIN);
+    cmd->action = crm_element_value_copy(rsc_xml, PCMK__XA_LRMD_RSC_ACTION);
+    cmd->userdata_str = crm_element_value_copy(rsc_xml,
+                                               PCMK__XA_LRMD_RSC_USERDATA_STR);
+    cmd->rsc_id = crm_element_value_copy(rsc_xml, PCMK__XA_LRMD_RSC_ID);
 
     cmd->params = xml2list(rsc_xml);
 
-    if (pcmk__str_eq(g_hash_table_lookup(cmd->params, "CRM_meta_on_fail"), "block", pcmk__str_casei)) {
+    if (pcmk__str_eq(g_hash_table_lookup(cmd->params, "CRM_meta_on_fail"),
+                     PCMK_VALUE_BLOCK, pcmk__str_casei)) {
         crm_debug("Setting flag to leave pid group on timeout and "
                   "only kill action pid for " PCMK__OP_FMT,
                   cmd->rsc_id, cmd->action, cmd->interval_ms);
@@ -535,11 +539,11 @@ schedule_lrmd_cmd(lrmd_rsc_t * rsc, lrmd_cmd_t * cmd)
 static xmlNode *
 create_lrmd_reply(const char *origin, int rc, int call_id)
 {
-    xmlNode *reply = create_xml_node(NULL, T_LRMD_REPLY);
+    xmlNode *reply = pcmk__xe_create(NULL, PCMK__XE_LRMD_REPLY);
 
-    crm_xml_add(reply, F_LRMD_ORIGIN, origin);
-    crm_xml_add_int(reply, F_LRMD_RC, rc);
-    crm_xml_add_int(reply, F_LRMD_CALLID, call_id);
+    crm_xml_add(reply, PCMK__XA_LRMD_ORIGIN, origin);
+    crm_xml_add_int(reply, PCMK__XA_LRMD_RC, rc);
+    crm_xml_add_int(reply, PCMK__XA_LRMD_CALLID, call_id);
     return reply;
 }
 
@@ -614,41 +618,44 @@ send_cmd_complete_notify(lrmd_cmd_t * cmd)
     cmd->last_notify_rc = cmd->result.exit_status;
     cmd->last_notify_op_status = cmd->result.execution_status;
 
-    notify = create_xml_node(NULL, T_LRMD_NOTIFY);
+    notify = pcmk__xe_create(NULL, PCMK__XE_LRMD_NOTIFY);
 
-    crm_xml_add(notify, F_LRMD_ORIGIN, __func__);
-    crm_xml_add_int(notify, F_LRMD_TIMEOUT, cmd->timeout);
-    crm_xml_add_ms(notify, F_LRMD_RSC_INTERVAL, cmd->interval_ms);
-    crm_xml_add_int(notify, F_LRMD_RSC_START_DELAY, cmd->start_delay);
-    crm_xml_add_int(notify, F_LRMD_EXEC_RC, cmd->result.exit_status);
-    crm_xml_add_int(notify, F_LRMD_OP_STATUS, cmd->result.execution_status);
-    crm_xml_add_int(notify, F_LRMD_CALLID, cmd->call_id);
-    crm_xml_add_int(notify, F_LRMD_RSC_DELETED, cmd->rsc_deleted);
+    crm_xml_add(notify, PCMK__XA_LRMD_ORIGIN, __func__);
+    crm_xml_add_int(notify, PCMK__XA_LRMD_TIMEOUT, cmd->timeout);
+    crm_xml_add_ms(notify, PCMK__XA_LRMD_RSC_INTERVAL, cmd->interval_ms);
+    crm_xml_add_int(notify, PCMK__XA_LRMD_RSC_START_DELAY, cmd->start_delay);
+    crm_xml_add_int(notify, PCMK__XA_LRMD_EXEC_RC, cmd->result.exit_status);
+    crm_xml_add_int(notify, PCMK__XA_LRMD_EXEC_OP_STATUS,
+                    cmd->result.execution_status);
+    crm_xml_add_int(notify, PCMK__XA_LRMD_CALLID, cmd->call_id);
+    crm_xml_add_int(notify, PCMK__XA_LRMD_RSC_DELETED, cmd->rsc_deleted);
 
-    crm_xml_add_ll(notify, F_LRMD_RSC_RUN_TIME,
+    crm_xml_add_ll(notify, PCMK__XA_LRMD_RUN_TIME,
                    (long long) cmd->epoch_last_run);
-    crm_xml_add_ll(notify, F_LRMD_RSC_RCCHANGE_TIME,
+    crm_xml_add_ll(notify, PCMK__XA_LRMD_RCCHANGE_TIME,
                    (long long) cmd->epoch_rcchange);
 #ifdef PCMK__TIME_USE_CGT
-    crm_xml_add_int(notify, F_LRMD_RSC_EXEC_TIME, exec_time);
-    crm_xml_add_int(notify, F_LRMD_RSC_QUEUE_TIME, queue_time);
+    crm_xml_add_int(notify, PCMK__XA_LRMD_EXEC_TIME, exec_time);
+    crm_xml_add_int(notify, PCMK__XA_LRMD_QUEUE_TIME, queue_time);
 #endif
 
-    crm_xml_add(notify, F_LRMD_OPERATION, LRMD_OP_RSC_EXEC);
-    crm_xml_add(notify, F_LRMD_RSC_ID, cmd->rsc_id);
+    crm_xml_add(notify, PCMK__XA_LRMD_OP, LRMD_OP_RSC_EXEC);
+    crm_xml_add(notify, PCMK__XA_LRMD_RSC_ID, cmd->rsc_id);
     if(cmd->real_action) {
-        crm_xml_add(notify, F_LRMD_RSC_ACTION, cmd->real_action);
+        crm_xml_add(notify, PCMK__XA_LRMD_RSC_ACTION, cmd->real_action);
     } else {
-        crm_xml_add(notify, F_LRMD_RSC_ACTION, cmd->action);
+        crm_xml_add(notify, PCMK__XA_LRMD_RSC_ACTION, cmd->action);
     }
-    crm_xml_add(notify, F_LRMD_RSC_USERDATA_STR, cmd->userdata_str);
-    crm_xml_add(notify, F_LRMD_RSC_EXIT_REASON, cmd->result.exit_reason);
+    crm_xml_add(notify, PCMK__XA_LRMD_RSC_USERDATA_STR, cmd->userdata_str);
+    crm_xml_add(notify, PCMK__XA_LRMD_RSC_EXIT_REASON, cmd->result.exit_reason);
 
     if (cmd->result.action_stderr != NULL) {
-        crm_xml_add(notify, F_LRMD_RSC_OUTPUT, cmd->result.action_stderr);
+        crm_xml_add(notify, PCMK__XA_LRMD_RSC_OUTPUT,
+                    cmd->result.action_stderr);
 
     } else if (cmd->result.action_stdout != NULL) {
-        crm_xml_add(notify, F_LRMD_RSC_OUTPUT, cmd->result.action_stdout);
+        crm_xml_add(notify, PCMK__XA_LRMD_RSC_OUTPUT,
+                    cmd->result.action_stdout);
     }
 
     if (cmd->params) {
@@ -656,7 +663,7 @@ send_cmd_complete_notify(lrmd_cmd_t * cmd)
         char *value = NULL;
         GHashTableIter iter;
 
-        xmlNode *args = create_xml_node(notify, XML_TAG_ATTRS);
+        xmlNode *args = pcmk__xe_create(notify, PCMK__XE_ATTRIBUTES);
 
         g_hash_table_iter_init(&iter, cmd->params);
         while (g_hash_table_iter_next(&iter, (gpointer *) & key, (gpointer *) & value)) {
@@ -684,18 +691,19 @@ send_generic_notify(int rc, xmlNode * request)
     if (pcmk__ipc_client_count() != 0) {
         int call_id = 0;
         xmlNode *notify = NULL;
-        xmlNode *rsc_xml = get_xpath_object("//" F_LRMD_RSC, request, LOG_ERR);
-        const char *rsc_id = crm_element_value(rsc_xml, F_LRMD_RSC_ID);
-        const char *op = crm_element_value(request, F_LRMD_OPERATION);
+        xmlNode *rsc_xml = get_xpath_object("//" PCMK__XE_LRMD_RSC, request,
+                                            LOG_ERR);
+        const char *rsc_id = crm_element_value(rsc_xml, PCMK__XA_LRMD_RSC_ID);
+        const char *op = crm_element_value(request, PCMK__XA_LRMD_OP);
 
-        crm_element_value_int(request, F_LRMD_CALLID, &call_id);
+        crm_element_value_int(request, PCMK__XA_LRMD_CALLID, &call_id);
 
-        notify = create_xml_node(NULL, T_LRMD_NOTIFY);
-        crm_xml_add(notify, F_LRMD_ORIGIN, __func__);
-        crm_xml_add_int(notify, F_LRMD_RC, rc);
-        crm_xml_add_int(notify, F_LRMD_CALLID, call_id);
-        crm_xml_add(notify, F_LRMD_OPERATION, op);
-        crm_xml_add(notify, F_LRMD_RSC_ID, rsc_id);
+        notify = pcmk__xe_create(NULL, PCMK__XE_LRMD_NOTIFY);
+        crm_xml_add(notify, PCMK__XA_LRMD_ORIGIN, __func__);
+        crm_xml_add_int(notify, PCMK__XA_LRMD_RC, rc);
+        crm_xml_add_int(notify, PCMK__XA_LRMD_CALLID, call_id);
+        crm_xml_add(notify, PCMK__XA_LRMD_OP, op);
+        crm_xml_add(notify, PCMK__XA_LRMD_RSC_ID, rsc_id);
 
         pcmk__foreach_ipc_client(send_client_notify, notify);
 
@@ -778,9 +786,9 @@ notify_of_new_client(pcmk__client_t *new_client)
     struct notify_new_client_data data;
 
     data.new_client = new_client;
-    data.notify = create_xml_node(NULL, T_LRMD_NOTIFY);
-    crm_xml_add(data.notify, F_LRMD_ORIGIN, __func__);
-    crm_xml_add(data.notify, F_LRMD_OPERATION, LRMD_OP_NEW_CLIENT);
+    data.notify = pcmk__xe_create(NULL, PCMK__XE_LRMD_NOTIFY);
+    crm_xml_add(data.notify, PCMK__XA_LRMD_ORIGIN, __func__);
+    crm_xml_add(data.notify, PCMK__XA_LRMD_OP, LRMD_OP_NEW_CLIENT);
     pcmk__foreach_ipc_client(notify_one_client, &data);
     free_xml(data.notify);
 }
@@ -853,7 +861,7 @@ action_complete(svc_action_t * action)
              */
             goagain = true;
             cmd->real_action = cmd->action;
-            cmd->action = strdup(PCMK_ACTION_MONITOR);
+            cmd->action = pcmk__str_copy(PCMK_ACTION_MONITOR);
 
         } else if (cmd->real_action != NULL) {
             // This is follow-up monitor to check whether start/stop completed
@@ -1479,23 +1487,33 @@ process_lrmd_signon(pcmk__client_t *client, xmlNode *request, int call_id,
 {
     int rc = pcmk_ok;
     time_t now = time(NULL);
-    const char *protocol_version = crm_element_value(request, F_LRMD_PROTOCOL_VERSION);
+    const char *protocol_version =
+        crm_element_value(request, PCMK__XA_LRMD_PROTOCOL_VERSION);
     const char *start_state = pcmk__env_option(PCMK__ENV_NODE_START_STATE);
 
-    if (compare_version(protocol_version, LRMD_MIN_PROTOCOL_VERSION) < 0) {
+    if (compare_version(protocol_version, LRMD_COMPATIBLE_PROTOCOL) < 0) {
         crm_err("Cluster API version must be greater than or equal to %s, not %s",
-                LRMD_MIN_PROTOCOL_VERSION, protocol_version);
+                LRMD_COMPATIBLE_PROTOCOL, protocol_version);
         rc = -EPROTO;
     }
 
-    if (pcmk__xe_attr_is_true(request, F_LRMD_IS_IPC_PROVIDER)) {
+    if (pcmk__xe_attr_is_true(request, PCMK__XA_LRMD_IS_IPC_PROVIDER)) {
 #ifdef PCMK__COMPILE_REMOTE
         if ((client->remote != NULL)
             && pcmk_is_set(client->flags,
                            pcmk__client_tls_handshake_complete)) {
+            const char *op = crm_element_value(request, PCMK__XA_LRMD_OP);
 
             // This is a remote connection from a cluster node's controller
             ipc_proxy_add_provider(client);
+
+            /* If this was a register operation, also ask for new schema files but
+             * only if it's supported by the protocol version.
+             */
+            if (pcmk__str_eq(op, CRM_OP_REGISTER, pcmk__str_none) &&
+                LRMD_SUPPORTS_SCHEMA_XFER(protocol_version)) {
+                remoted_request_cib_schema_files();
+            }
         } else {
             rc = -EACCES;
         }
@@ -1505,9 +1523,9 @@ process_lrmd_signon(pcmk__client_t *client, xmlNode *request, int call_id,
     }
 
     *reply = create_lrmd_reply(__func__, rc, call_id);
-    crm_xml_add(*reply, F_LRMD_OPERATION, CRM_OP_REGISTER);
-    crm_xml_add(*reply, F_LRMD_CLIENTID, client->id);
-    crm_xml_add(*reply, F_LRMD_PROTOCOL_VERSION, LRMD_PROTOCOL_VERSION);
+    crm_xml_add(*reply, PCMK__XA_LRMD_OP, CRM_OP_REGISTER);
+    crm_xml_add(*reply, PCMK__XA_LRMD_CLIENTID, client->id);
+    crm_xml_add(*reply, PCMK__XA_LRMD_PROTOCOL_VERSION, LRMD_PROTOCOL_VERSION);
     crm_xml_add_ll(*reply, PCMK__XA_UPTIME, now - start_time);
 
     if (start_state) {
@@ -1542,8 +1560,9 @@ static xmlNode *
 process_lrmd_get_rsc_info(xmlNode *request, int call_id)
 {
     int rc = pcmk_ok;
-    xmlNode *rsc_xml = get_xpath_object("//" F_LRMD_RSC, request, LOG_ERR);
-    const char *rsc_id = crm_element_value(rsc_xml, F_LRMD_RSC_ID);
+    xmlNode *rsc_xml = get_xpath_object("//" PCMK__XE_LRMD_RSC, request,
+                                        LOG_ERR);
+    const char *rsc_id = crm_element_value(rsc_xml, PCMK__XA_LRMD_RSC_ID);
     xmlNode *reply = NULL;
     lrmd_rsc_t *rsc = NULL;
 
@@ -1559,10 +1578,10 @@ process_lrmd_get_rsc_info(xmlNode *request, int call_id)
 
     reply = create_lrmd_reply(__func__, rc, call_id);
     if (rsc) {
-        crm_xml_add(reply, F_LRMD_RSC_ID, rsc->rsc_id);
-        crm_xml_add(reply, F_LRMD_CLASS, rsc->class);
-        crm_xml_add(reply, F_LRMD_PROVIDER, rsc->provider);
-        crm_xml_add(reply, F_LRMD_TYPE, rsc->type);
+        crm_xml_add(reply, PCMK__XA_LRMD_RSC_ID, rsc->rsc_id);
+        crm_xml_add(reply, PCMK__XA_LRMD_CLASS, rsc->class);
+        crm_xml_add(reply, PCMK__XA_LRMD_PROVIDER, rsc->provider);
+        crm_xml_add(reply, PCMK__XA_LRMD_TYPE, rsc->type);
     }
     return reply;
 }
@@ -1573,8 +1592,9 @@ process_lrmd_rsc_unregister(pcmk__client_t *client, uint32_t id,
 {
     int rc = pcmk_ok;
     lrmd_rsc_t *rsc = NULL;
-    xmlNode *rsc_xml = get_xpath_object("//" F_LRMD_RSC, request, LOG_ERR);
-    const char *rsc_id = crm_element_value(rsc_xml, F_LRMD_RSC_ID);
+    xmlNode *rsc_xml = get_xpath_object("//" PCMK__XE_LRMD_RSC, request,
+                                        LOG_ERR);
+    const char *rsc_id = crm_element_value(rsc_xml, PCMK__XA_LRMD_RSC_ID);
 
     if (!rsc_id) {
         return -ENODEV;
@@ -1604,8 +1624,9 @@ process_lrmd_rsc_exec(pcmk__client_t *client, uint32_t id, xmlNode *request)
 {
     lrmd_rsc_t *rsc = NULL;
     lrmd_cmd_t *cmd = NULL;
-    xmlNode *rsc_xml = get_xpath_object("//" F_LRMD_RSC, request, LOG_ERR);
-    const char *rsc_id = crm_element_value(rsc_xml, F_LRMD_RSC_ID);
+    xmlNode *rsc_xml = get_xpath_object("//" PCMK__XE_LRMD_RSC, request,
+                                        LOG_ERR);
+    const char *rsc_id = crm_element_value(rsc_xml, PCMK__XA_LRMD_RSC_ID);
     int call_id;
 
     if (!rsc_id) {
@@ -1727,12 +1748,13 @@ cancel_all_recurring(lrmd_rsc_t * rsc, const char *client_id)
 static int
 process_lrmd_rsc_cancel(pcmk__client_t *client, uint32_t id, xmlNode *request)
 {
-    xmlNode *rsc_xml = get_xpath_object("//" F_LRMD_RSC, request, LOG_ERR);
-    const char *rsc_id = crm_element_value(rsc_xml, F_LRMD_RSC_ID);
-    const char *action = crm_element_value(rsc_xml, F_LRMD_RSC_ACTION);
+    xmlNode *rsc_xml = get_xpath_object("//" PCMK__XE_LRMD_RSC, request,
+                                        LOG_ERR);
+    const char *rsc_id = crm_element_value(rsc_xml, PCMK__XA_LRMD_RSC_ID);
+    const char *action = crm_element_value(rsc_xml, PCMK__XA_LRMD_RSC_ACTION);
     guint interval_ms = 0;
 
-    crm_element_value_ms(rsc_xml, F_LRMD_RSC_INTERVAL, &interval_ms);
+    crm_element_value_ms(rsc_xml, PCMK__XA_LRMD_RSC_INTERVAL, &interval_ms);
 
     if (!rsc_id || !action) {
         return -EINVAL;
@@ -1744,17 +1766,17 @@ process_lrmd_rsc_cancel(pcmk__client_t *client, uint32_t id, xmlNode *request)
 static void
 add_recurring_op_xml(xmlNode *reply, lrmd_rsc_t *rsc)
 {
-    xmlNode *rsc_xml = create_xml_node(reply, F_LRMD_RSC);
+    xmlNode *rsc_xml = pcmk__xe_create(reply, PCMK__XE_LRMD_RSC);
 
-    crm_xml_add(rsc_xml, F_LRMD_RSC_ID, rsc->rsc_id);
+    crm_xml_add(rsc_xml, PCMK__XA_LRMD_RSC_ID, rsc->rsc_id);
     for (GList *item = rsc->recurring_ops; item != NULL; item = item->next) {
         lrmd_cmd_t *cmd = item->data;
-        xmlNode *op_xml = create_xml_node(rsc_xml, T_LRMD_RSC_OP);
+        xmlNode *op_xml = pcmk__xe_create(rsc_xml, PCMK__XE_LRMD_RSC_OP);
 
-        crm_xml_add(op_xml, F_LRMD_RSC_ACTION,
-                    (cmd->real_action? cmd->real_action : cmd->action));
-        crm_xml_add_ms(op_xml, F_LRMD_RSC_INTERVAL, cmd->interval_ms);
-        crm_xml_add_int(op_xml, F_LRMD_TIMEOUT, cmd->timeout_orig);
+        crm_xml_add(op_xml, PCMK__XA_LRMD_RSC_ACTION,
+                    pcmk__s(cmd->real_action, cmd->action));
+        crm_xml_add_ms(op_xml, PCMK__XA_LRMD_RSC_INTERVAL, cmd->interval_ms);
+        crm_xml_add_int(op_xml, PCMK__XA_LRMD_TIMEOUT, cmd->timeout_orig);
     }
 }
 
@@ -1768,12 +1790,12 @@ process_lrmd_get_recurring(xmlNode *request, int call_id)
     xmlNode *rsc_xml = NULL;
 
     // Resource ID is optional
-    rsc_xml = first_named_child(request, F_LRMD_CALLDATA);
+    rsc_xml = pcmk__xe_first_child(request, PCMK__XE_LRMD_CALLDATA, NULL, NULL);
     if (rsc_xml) {
-        rsc_xml = first_named_child(rsc_xml, F_LRMD_RSC);
+        rsc_xml = pcmk__xe_first_child(rsc_xml, PCMK__XE_LRMD_RSC, NULL, NULL);
     }
     if (rsc_xml) {
-        rsc_id = crm_element_value(rsc_xml, F_LRMD_RSC_ID);
+        rsc_id = crm_element_value(rsc_xml, PCMK__XA_LRMD_RSC_ID);
     }
 
     // If resource ID is specified, resource must exist
@@ -1809,7 +1831,7 @@ process_lrmd_message(pcmk__client_t *client, uint32_t id, xmlNode *request)
 {
     int rc = pcmk_ok;
     int call_id = 0;
-    const char *op = crm_element_value(request, F_LRMD_OPERATION);
+    const char *op = crm_element_value(request, PCMK__XA_LRMD_OP);
     int do_reply = 0;
     int do_notify = 0;
     xmlNode *reply = NULL;
@@ -1821,7 +1843,7 @@ process_lrmd_message(pcmk__client_t *client, uint32_t id, xmlNode *request)
     bool allowed = pcmk_is_set(client->flags, pcmk__client_privileged);
 
     crm_trace("Processing %s operation from %s", op, client->id);
-    crm_element_value_int(request, F_LRMD_CALLID, &call_id);
+    crm_element_value_int(request, PCMK__XA_LRMD_CALLID, &call_id);
 
     if (pcmk__str_eq(op, CRM_OP_IPC_FWD, pcmk__str_none)) {
 #ifdef PCMK__COMPILE_REMOTE
@@ -1882,10 +1904,16 @@ process_lrmd_message(pcmk__client_t *client, uint32_t id, xmlNode *request)
         do_reply = 1;
     } else if (pcmk__str_eq(op, LRMD_OP_CHECK, pcmk__str_none)) {
         if (allowed) {
-            xmlNode *data = get_message_xml(request, F_LRMD_CALLDATA);
+            xmlNode *wrapper = pcmk__xe_first_child(request,
+                                                    PCMK__XE_LRMD_CALLDATA,
+                                                    NULL, NULL);
+            xmlNode *data = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
+
+            const char *timeout = NULL;
 
             CRM_LOG_ASSERT(data != NULL);
-            pcmk__valid_sbd_timeout(crm_element_value(data, F_LRMD_WATCHDOG));
+            timeout = crm_element_value(data, PCMK__XA_LRMD_WATCHDOG);
+            pcmk__valid_stonith_watchdog_timeout(timeout);
         } else {
             rc = -EACCES;
         }
diff --git a/daemons/execd/pacemaker-execd.c b/daemons/execd/pacemaker-execd.c
index e7e30eb..926e278 100644
--- a/daemons/execd/pacemaker-execd.c
+++ b/daemons/execd/pacemaker-execd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the Pacemaker project contributors
+ * Copyright 2012-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,7 @@
 #include <sys/types.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 #include <crm/services.h>
 #include <crm/common/cmdline_internal.h>
 #include <crm/common/ipc.h>
@@ -89,9 +89,11 @@ get_stonith_connection(void)
             stonith_api_delete(stonith_api);
             stonith_api = NULL;
         } else {
-            stonith_api->cmds->register_notification(stonith_api,
-                                                     T_STONITH_NOTIFY_DISCONNECT,
-                                                     stonith_connection_destroy_cb);
+            stonith_api_operations_t *cmds = stonith_api->cmds;
+
+            cmds->register_notification(stonith_api,
+                                        PCMK__VALUE_ST_NOTIFY_DISCONNECT,
+                                        stonith_connection_destroy_cb);
         }
     }
     return stonith_api;
@@ -102,7 +104,7 @@ lrmd_ipc_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
 {
     crm_trace("Connection %p", c);
     if (pcmk__new_client(c, uid, gid) == NULL) {
-        return -EIO;
+        return -ENOMEM;
     }
     return 0;
 }
@@ -141,12 +143,13 @@ lrmd_ipc_dispatch(qb_ipcs_connection_t * c, void *data, size_t size)
     }
 
     if (!client->name) {
-        const char *value = crm_element_value(request, F_LRMD_CLIENTNAME);
+        const char *value = crm_element_value(request,
+                                              PCMK__XA_LRMD_CLIENTNAME);
 
         if (value == NULL) {
             client->name = pcmk__itoa(pcmk__client_pid(c));
         } else {
-            client->name = strdup(value);
+            client->name = pcmk__str_copy(value);
         }
     }
 
@@ -155,9 +158,9 @@ lrmd_ipc_dispatch(qb_ipcs_connection_t * c, void *data, size_t size)
         lrmd_call_id = 1;
     }
 
-    crm_xml_add(request, F_LRMD_CLIENTID, client->id);
-    crm_xml_add(request, F_LRMD_CLIENTNAME, client->name);
-    crm_xml_add_int(request, F_LRMD_CALLID, lrmd_call_id);
+    crm_xml_add(request, PCMK__XA_LRMD_CLIENTID, client->id);
+    crm_xml_add(request, PCMK__XA_LRMD_CLIENTNAME, client->name);
+    crm_xml_add_int(request, PCMK__XA_LRMD_CALLID, lrmd_call_id);
 
     process_lrmd_message(client, id, request);
 
@@ -281,11 +284,7 @@ static gboolean
 lrmd_exit(gpointer data)
 {
     crm_info("Terminating with %d clients", pcmk__ipc_client_count());
-    if (stonith_api) {
-        stonith_api->cmds->remove_notification(stonith_api, T_STONITH_NOTIFY_DISCONNECT);
-        stonith_api->cmds->disconnect(stonith_api);
-        stonith_api_delete(stonith_api);
-    }
+    stonith_api_delete(stonith_api);
     if (ipcs) {
         mainloop_del_ipc_server(ipcs);
     }
@@ -443,19 +442,23 @@ main(int argc, char **argv, char **envp)
     GError *error = NULL;
 
     GOptionGroup *output_group = NULL;
-    pcmk__common_args_t *args = pcmk__new_common_args(SUMMARY);
-#ifdef PCMK__COMPILE_REMOTE
-    gchar **processed_args = pcmk__cmdline_preproc(argv, "lp");
-#else
-    gchar **processed_args = pcmk__cmdline_preproc(argv, "l");
-#endif  // PCMK__COMPILE_REMOTE
-    GOptionContext *context = build_arg_context(args, &output_group);
+    pcmk__common_args_t *args = NULL;
+    gchar **processed_args = NULL;
+    GOptionContext *context = NULL;
 
 #ifdef PCMK__COMPILE_REMOTE
     // If necessary, create PID 1 now before any file descriptors are opened
     remoted_spawn_pidone(argc, argv, envp);
 #endif
 
+    args = pcmk__new_common_args(SUMMARY);
+#ifdef PCMK__COMPILE_REMOTE
+    processed_args = pcmk__cmdline_preproc(argv, "lp");
+#else
+    processed_args = pcmk__cmdline_preproc(argv, "l");
+#endif  // PCMK__COMPILE_REMOTE
+    context = build_arg_context(args, &output_group);
+
     crm_log_preinit(EXECD_NAME, argc, argv);
 
     pcmk__register_formats(output_group, formats);
@@ -495,7 +498,7 @@ main(int argc, char **argv, char **envp)
 
     // ocf_log() (in resource-agents) uses the capitalized env options below
     option = pcmk__env_option(PCMK__ENV_LOGFACILITY);
-    if (!pcmk__str_eq(option, PCMK__VALUE_NONE,
+    if (!pcmk__str_eq(option, PCMK_VALUE_NONE,
                       pcmk__str_casei|pcmk__str_null_matches)
         && !pcmk__str_eq(option, "/dev/null", pcmk__str_none)) {
 
@@ -503,7 +506,7 @@ main(int argc, char **argv, char **envp)
     }
 
     option = pcmk__env_option(PCMK__ENV_LOGFILE);
-    if (!pcmk__str_eq(option, PCMK__VALUE_NONE,
+    if (!pcmk__str_eq(option, PCMK_VALUE_NONE,
                       pcmk__str_casei|pcmk__str_null_matches)) {
         pcmk__set_env_option("LOGFILE", option, true);
 
diff --git a/daemons/execd/pacemaker-execd.h b/daemons/execd/pacemaker-execd.h
index 9c1d173..6fb8ef4 100644
--- a/daemons/execd/pacemaker-execd.h
+++ b/daemons/execd/pacemaker-execd.h
@@ -101,6 +101,7 @@ void ipc_proxy_forward_client(pcmk__client_t *client, xmlNode *xml);
 pcmk__client_t *ipc_proxy_get_provider(void);
 int ipc_proxy_shutdown_req(pcmk__client_t *ipc_proxy);
 void remoted_spawn_pidone(int argc, char **argv, char **envp);
+void remoted_request_cib_schema_files(void);
 #endif
 
 int process_lrmd_alert_exec(pcmk__client_t *client, uint32_t id,
diff --git a/daemons/execd/remoted_pidone.c b/daemons/execd/remoted_pidone.c
index 08271bf..0a6c251 100644
--- a/daemons/execd/remoted_pidone.c
+++ b/daemons/execd/remoted_pidone.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2023 the Pacemaker project contributors
+ * Copyright 2017-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -25,7 +25,7 @@ static pid_t main_pid = 0;
 static void
 sigdone(void)
 {
-    exit(CRM_EX_OK);
+    crm_exit(CRM_EX_OK);
 }
 
 static void
@@ -44,9 +44,9 @@ sigreap(void)
         if (pid == main_pid) {
             /* Exit when pacemaker-remote exits and use the same return code */
             if (WIFEXITED(status)) {
-                exit(WEXITSTATUS(status));
+                crm_exit(WEXITSTATUS(status));
             }
-            exit(CRM_EX_ERROR);
+            crm_exit(CRM_EX_ERROR);
         }
     } while (pid > 0);
 }
@@ -203,7 +203,7 @@ remoted_spawn_pidone(int argc, char **argv, char **envp)
      *   from /etc/pacemaker/pcmk-init.env, which could be useful for testing or
      *   containers with a custom PID 1 script that launches pacemaker-remoted.
      */
-    const char *pid1 = "default";
+    const char *pid1 = PCMK_VALUE_DEFAULT;
 
     if (getpid() != 1) {
         pid1 = pcmk__env_option(PCMK__ENV_REMOTE_PID1);
diff --git a/daemons/execd/remoted_proxy.c b/daemons/execd/remoted_proxy.c
index 62c8c3a..40dfdc6 100644
--- a/daemons/execd/remoted_proxy.c
+++ b/daemons/execd/remoted_proxy.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the Pacemaker project contributors
+ * Copyright 2012-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,7 @@
 
 #include "pacemaker-execd.h"
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 #include <crm/services.h>
 #include <crm/common/mainloop.h>
 #include <crm/common/ipc.h>
@@ -81,12 +81,12 @@ ipc_proxy_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid, const char *ipc
      */
     client = pcmk__new_client(c, uid, gid);
     if (client == NULL) {
-        return -EREMOTEIO;
+        return -ENOMEM;
     }
 
     /* This ipc client is bound to a single ipc provider. If the
      * provider goes away, this client is disconnected */
-    client->userdata = strdup(ipc_proxy->id);
+    client->userdata = pcmk__str_copy(ipc_proxy->id);
     client->name = crm_strdup_printf("proxy-%s-%d-%.8s", ipc_channel, client->pid, client->id);
 
     /* Allow remote executor to distinguish between proxied local clients and
@@ -96,10 +96,10 @@ ipc_proxy_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid, const char *ipc
 
     g_hash_table_insert(ipc_clients, client->id, client);
 
-    msg = create_xml_node(NULL, T_LRMD_IPC_PROXY);
-    crm_xml_add(msg, F_LRMD_IPC_OP, LRMD_IPC_OP_NEW);
-    crm_xml_add(msg, F_LRMD_IPC_IPC_SERVER, ipc_channel);
-    crm_xml_add(msg, F_LRMD_IPC_SESSION, client->id);
+    msg = pcmk__xe_create(NULL, PCMK__XE_LRMD_IPC_PROXY);
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_OP, LRMD_IPC_OP_NEW);
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_SERVER, ipc_channel);
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_SESSION, client->id);
     lrmd_server_send_notify(ipc_proxy, msg);
     free_xml(msg);
     crm_debug("Accepted IPC proxy connection (session ID %s) "
@@ -117,7 +117,7 @@ crmd_proxy_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
 static int32_t
 attrd_proxy_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
 {
-    return ipc_proxy_accept(c, uid, gid, T_ATTRD);
+    return ipc_proxy_accept(c, uid, gid, PCMK__VALUE_ATTRD);
 }
 
 static int32_t
@@ -147,9 +147,13 @@ cib_proxy_accept_ro(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
 void
 ipc_proxy_forward_client(pcmk__client_t *ipc_proxy, xmlNode *xml)
 {
-    const char *session = crm_element_value(xml, F_LRMD_IPC_SESSION);
-    const char *msg_type = crm_element_value(xml, F_LRMD_IPC_OP);
-    xmlNode *msg = get_message_xml(xml, F_LRMD_IPC_MSG);
+    const char *session = crm_element_value(xml, PCMK__XA_LRMD_IPC_SESSION);
+    const char *msg_type = crm_element_value(xml, PCMK__XA_LRMD_IPC_OP);
+
+    xmlNode *wrapper = pcmk__xe_first_child(xml, PCMK__XE_LRMD_IPC_MSG, NULL,
+                                            NULL);
+    xmlNode *msg = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
+
     pcmk__client_t *ipc_client;
     int rc = pcmk_rc_ok;
 
@@ -169,9 +173,9 @@ ipc_proxy_forward_client(pcmk__client_t *ipc_proxy, xmlNode *xml)
 
     ipc_client = pcmk__find_client_by_id(session);
     if (ipc_client == NULL) {
-        xmlNode *msg = create_xml_node(NULL, T_LRMD_IPC_PROXY);
-        crm_xml_add(msg, F_LRMD_IPC_OP, LRMD_IPC_OP_DESTROY);
-        crm_xml_add(msg, F_LRMD_IPC_SESSION, session);
+        xmlNode *msg = pcmk__xe_create(NULL, PCMK__XE_LRMD_IPC_PROXY);
+        crm_xml_add(msg, PCMK__XA_LRMD_IPC_OP, LRMD_IPC_OP_DESTROY);
+        crm_xml_add(msg, PCMK__XA_LRMD_IPC_SESSION, session);
         lrmd_server_send_notify(ipc_proxy, msg);
         free_xml(msg);
         return;
@@ -198,7 +202,7 @@ ipc_proxy_forward_client(pcmk__client_t *ipc_proxy, xmlNode *xml)
     } else if (pcmk__str_eq(msg_type, LRMD_IPC_OP_RESPONSE, pcmk__str_casei)) {
         int msg_id = 0;
 
-        crm_element_value_int(xml, F_LRMD_IPC_MSG_ID, &msg_id);
+        crm_element_value_int(xml, PCMK__XA_LRMD_IPC_MSG_ID, &msg_id);
         crm_trace("Sending response to %d - %s", ipc_client->request_id, ipc_client->id);
         rc = pcmk__ipc_send_xml(ipc_client, msg_id, msg, FALSE);
 
@@ -225,6 +229,7 @@ ipc_proxy_dispatch(qb_ipcs_connection_t * c, void *data, size_t size)
     uint32_t flags = 0;
     pcmk__client_t *client = pcmk__find_client(c);
     pcmk__client_t *ipc_proxy = pcmk__find_client_by_id(client->userdata);
+    xmlNode *wrapper = NULL;
     xmlNode *request = NULL;
     xmlNode *msg = NULL;
 
@@ -263,18 +268,22 @@ ipc_proxy_dispatch(qb_ipcs_connection_t * c, void *data, size_t size)
     pcmk__set_ipc_flags(flags, pcmk__client_name(client), crm_ipc_proxied);
     client->request_id = id;
 
-    msg = create_xml_node(NULL, T_LRMD_IPC_PROXY);
-    crm_xml_add(msg, F_LRMD_IPC_OP, LRMD_IPC_OP_REQUEST);
-    crm_xml_add(msg, F_LRMD_IPC_SESSION, client->id);
-    crm_xml_add(msg, F_LRMD_IPC_CLIENT, pcmk__client_name(client));
-    crm_xml_add(msg, F_LRMD_IPC_USER, client->user);
-    crm_xml_add_int(msg, F_LRMD_IPC_MSG_ID, id);
-    crm_xml_add_int(msg, F_LRMD_IPC_MSG_FLAGS, flags);
-    add_message_xml(msg, F_LRMD_IPC_MSG, request);
+    msg = pcmk__xe_create(NULL, PCMK__XE_LRMD_IPC_PROXY);
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_OP, LRMD_IPC_OP_REQUEST);
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_SESSION, client->id);
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_CLIENT, pcmk__client_name(client));
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_USER, client->user);
+    crm_xml_add_int(msg, PCMK__XA_LRMD_IPC_MSG_ID, id);
+    crm_xml_add_int(msg, PCMK__XA_LRMD_IPC_MSG_FLAGS, flags);
+
+    wrapper = pcmk__xe_create(msg, PCMK__XE_LRMD_IPC_MSG);
+
+    pcmk__xml_copy(wrapper, request);
+
     lrmd_server_send_notify(ipc_proxy, msg);
+
     free_xml(request);
     free_xml(msg);
-
     return 0;
 }
 
@@ -289,15 +298,15 @@ ipc_proxy_dispatch(qb_ipcs_connection_t * c, void *data, size_t size)
 int
 ipc_proxy_shutdown_req(pcmk__client_t *ipc_proxy)
 {
-    xmlNode *msg = create_xml_node(NULL, T_LRMD_IPC_PROXY);
+    xmlNode *msg = pcmk__xe_create(NULL, PCMK__XE_LRMD_IPC_PROXY);
     int rc;
 
-    crm_xml_add(msg, F_LRMD_IPC_OP, LRMD_IPC_OP_SHUTDOWN_REQ);
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_OP, LRMD_IPC_OP_SHUTDOWN_REQ);
 
     /* We don't really have a session, but the controller needs this attribute
      * to recognize this as proxy communication.
      */
-    crm_xml_add(msg, F_LRMD_IPC_SESSION, "0");
+    crm_xml_add(msg, PCMK__XA_LRMD_IPC_SESSION, "0");
 
     rc = (lrmd_server_send_notify(ipc_proxy, msg) != pcmk_rc_ok)? -1 : 0;
     free_xml(msg);
@@ -319,9 +328,9 @@ ipc_proxy_closed(qb_ipcs_connection_t * c)
     crm_trace("Connection %p", c);
 
     if (ipc_proxy) {
-        xmlNode *msg = create_xml_node(NULL, T_LRMD_IPC_PROXY);
-        crm_xml_add(msg, F_LRMD_IPC_OP, LRMD_IPC_OP_DESTROY);
-        crm_xml_add(msg, F_LRMD_IPC_SESSION, client->id);
+        xmlNode *msg = pcmk__xe_create(NULL, PCMK__XE_LRMD_IPC_PROXY);
+        crm_xml_add(msg, PCMK__XA_LRMD_IPC_OP, LRMD_IPC_OP_DESTROY);
+        crm_xml_add(msg, PCMK__XA_LRMD_IPC_SESSION, client->id);
         lrmd_server_send_notify(ipc_proxy, msg);
         free_xml(msg);
     }
diff --git a/daemons/execd/remoted_schemas.c b/daemons/execd/remoted_schemas.c
new file mode 100644
index 0000000..f0ec068
--- /dev/null
+++ b/daemons/execd/remoted_schemas.c
@@ -0,0 +1,286 @@
+/*
+ * Copyright 2023-2024 the Pacemaker project contributors
+ *
+ * The version control history for this file may have further details.
+ *
+ * This source code is licensed under the GNU Lesser General Public License
+ * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
+ */
+
+#include <crm_internal.h>
+
+#include <ftw.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include <crm/cib.h>
+#include <crm/cib/cib_types.h>
+#include <crm/cib/internal.h>
+#include <crm/crm.h>
+#include <crm/common/mainloop.h>
+#include <crm/common/xml.h>
+
+#include "pacemaker-execd.h"
+
+static pid_t schema_fetch_pid = 0;
+
+static int
+rm_files(const char *pathname, const struct stat *sbuf, int type, struct FTW *ftwb)
+{
+    /* Don't delete PCMK__REMOTE_SCHEMA_DIR . */
+    if (ftwb->level == 0) {
+        return 0;
+    }
+
+    if (remove(pathname) != 0) {
+        int rc = errno;
+        crm_err("Could not remove %s: %s", pathname, pcmk_rc_str(rc));
+        return -1;
+    }
+
+    return 0;
+}
+
+static void
+clean_up_extra_schema_files(void)
+{
+    const char *remote_schema_dir = pcmk__remote_schema_dir();
+    struct stat sb;
+    int rc;
+
+    rc = stat(remote_schema_dir, &sb);
+
+    if (rc == -1) {
+        if (errno == ENOENT) {
+            /* If the directory doesn't exist, try to make it first. */
+            if (mkdir(remote_schema_dir, 0755) != 0) {
+                rc = errno;
+                crm_err("Could not create directory for schemas: %s",
+                        pcmk_rc_str(rc));
+            }
+
+        } else {
+            rc = errno;
+            crm_err("Could not create directory for schemas: %s",
+                    pcmk_rc_str(rc));
+        }
+
+    } else if (!S_ISDIR(sb.st_mode)) {
+        /* If something exists with the same name that's not a directory, that's
+         * an error.
+         */
+        crm_err("%s already exists but is not a directory", remote_schema_dir);
+
+    } else {
+        /* It's a directory - clear it out so we can download potentially new
+         * schema files.
+         */
+        rc = nftw(remote_schema_dir, rm_files, 10, FTW_DEPTH|FTW_MOUNT|FTW_PHYS);
+
+        if (rc != 0) {
+            crm_err("Could not remove %s: %s", remote_schema_dir, pcmk_rc_str(rc));
+        }
+    }
+}
+
+static void
+write_extra_schema_file(xmlNode *xml, void *user_data)
+{
+    const char *remote_schema_dir = pcmk__remote_schema_dir();
+    const char *file = NULL;
+    char *path = NULL;
+    int rc;
+
+    file = crm_element_value(xml, PCMK_XA_PATH);
+    if (file == NULL) {
+        crm_warn("No destination path given in schema request");
+        return;
+    }
+
+    path = crm_strdup_printf("%s/%s", remote_schema_dir, file);
+
+    /* The schema is a CDATA node, which is a child of the <file> node.  Traverse
+     * all children and look for the first CDATA child.  There can't be more than
+     * one because we only have one file attribute on the parent.
+     */
+    for (xmlNode *child = xml->children; child != NULL; child = child->next) {
+        FILE *stream = NULL;
+
+        if (child->type != XML_CDATA_SECTION_NODE) {
+            continue;
+        }
+
+        stream = fopen(path, "w+");
+        if (stream == NULL) {
+            crm_warn("Could not write schema file %s: %s", path, strerror(errno));
+        } else {
+            rc = fprintf(stream, "%s", child->content);
+
+            if (rc < 0) {
+                crm_warn("Could not write schema file %s: %s", path, strerror(errno));
+            }
+
+            fclose(stream);
+        }
+
+        break;
+    }
+
+    free(path);
+}
+
+static void
+get_schema_files(void)
+{
+    int rc = pcmk_rc_ok;
+    cib_t *cib = NULL;
+    xmlNode *reply;
+
+    cib = cib_new();
+    if (cib == NULL) {
+        _exit(ENOTCONN);
+    }
+
+    rc = cib->cmds->signon(cib, crm_system_name, cib_query);
+    if (rc != pcmk_ok) {
+        crm_err("Could not connect to the CIB manager: %s", pcmk_strerror(rc));
+        _exit(pcmk_rc2exitc(rc));
+    }
+
+    rc = cib->cmds->fetch_schemas(cib, &reply, pcmk__highest_schema_name(),
+                                  cib_sync_call);
+    if (rc != pcmk_ok) {
+        crm_err("Could not get schema files: %s", pcmk_strerror(rc));
+        rc = pcmk_legacy2rc(rc);
+
+    } else if (reply->children != NULL) {
+        /* The returned document looks something like this:
+         * <cib_command>
+         *   <cib_calldata>
+         *     <schemas>
+         *       <schema version="pacemaker-1.1">
+         *         <file path="foo-1.1">
+         *         </file>
+         *         <file path="bar-1.1">
+         *         </file>
+         *         ...
+         *       </schema>
+         *       <schema version="pacemaker-1.2">
+         *       </schema>
+         *       ...
+         *     </schemas>
+         *   </cib_calldata>
+         * </cib_command>
+         *
+         * All the <schemas> and <schema> tags are really just there for organizing
+         * the XML a little better.  What we really care about are the <file> nodes,
+         * and specifically the path attributes and the CDATA children (not shown)
+         * of each.  We can use an xpath query to reach down and get all the <file>
+         * nodes at once.
+         *
+         * If we already have the latest schema version, or we asked for one later
+         * than what the cluster supports, we'll get back an empty <schemas> node,
+         * so all this will continue to work.  It just won't do anything.
+         */
+        crm_foreach_xpath_result(reply, "//" PCMK_XA_FILE,
+                                 write_extra_schema_file, NULL);
+    }
+
+    free_xml(reply);
+    cib__clean_up_connection(&cib);
+    _exit(pcmk_rc2exitc(rc));
+}
+
+/* Load any additional schema files when the child is finished fetching and
+ * saving them to disk.
+ */
+static void
+get_schema_files_complete(mainloop_child_t *p, pid_t pid, int core, int signo, int exitcode)
+{
+    const char *errmsg = "Could not load additional schema files";
+
+    if ((signo == 0) && (exitcode == 0)) {
+        const char *remote_schema_dir = pcmk__remote_schema_dir();
+
+        /* Don't just crm_schema_init here because that will load the base
+         * schemas again too.  Instead just load the things we fetched.
+         */
+        pcmk__load_schemas_from_dir(remote_schema_dir);
+        pcmk__sort_schemas();
+        crm_info("Fetching extra schema files completed successfully");
+
+    } else {
+        if (signo == 0) {
+            crm_err("%s: process %d exited %d", errmsg, (int) pid, exitcode);
+
+        } else {
+            crm_err("%s: process %d terminated with signal %d (%s)%s",
+                    errmsg, (int) pid, signo, strsignal(signo),
+                    (core? " and dumped core" : ""));
+        }
+
+        /* Clean up any incomplete schema data we might have been downloading when
+         * the process timed out or crashed.  We don't need to do any extra cleanup
+         * because we never loaded the extra schemas, and we don't need to call
+         * crm_schema_init because that was called in remoted_request_cib_schema_files
+         * before this function.
+         */
+        clean_up_extra_schema_files();
+    }
+}
+
+void
+remoted_request_cib_schema_files(void)
+{
+    pid_t pid;
+    int rc;
+
+    /* If a previous schema-fetch process is still running when we're called
+     * again, it's hung.  Attempt to kill it before cleaning up the extra
+     * directory.
+     */
+    if (schema_fetch_pid != 0) {
+        if (mainloop_child_kill(schema_fetch_pid) == FALSE) {
+            crm_warn("Unable to kill pre-existing schema-fetch process");
+            return;
+        }
+
+        schema_fetch_pid = 0;
+    }
+
+    /* Clean up any extra schema files we downloaded from a previous cluster
+     * connection.  After the files are gone, we need to wipe them from
+     * known_schemas, but there's no opposite operation for add_schema().
+     *
+     * Instead, unload all the schemas.  This means we'll also forget about all
+     * installed schemas as well, which means that pcmk__highest_schema_name()
+     * would fail. So we need to load the base schemas right now.
+     */
+    clean_up_extra_schema_files();
+    crm_schema_cleanup();
+    crm_schema_init();
+
+    crm_info("Fetching extra schema files from cluster");
+    pid = fork();
+
+    switch (pid) {
+        case -1: {
+            rc = errno;
+            crm_warn("Could not spawn process to get schema files: %s", pcmk_rc_str(rc));
+            break;
+        }
+
+        case 0:
+            /* child */
+            get_schema_files();
+            break;
+
+        default:
+            /* parent */
+            schema_fetch_pid = pid;
+            mainloop_child_add_with_flags(pid, 5 * 60 * 1000, "schema-fetch", NULL,
+                                          mainloop_leave_pid_group,
+                                          get_schema_files_complete);
+            break;
+    }
+}
diff --git a/daemons/execd/remoted_tls.c b/daemons/execd/remoted_tls.c
index 23a2dcf..e98991f 100644
--- a/daemons/execd/remoted_tls.c
+++ b/daemons/execd/remoted_tls.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the Pacemaker project contributors
+ * Copyright 2012-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -13,10 +13,8 @@
 #include <unistd.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
-#include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/mainloop.h>
+#include <crm/common/xml.h>
 #include <crm/common/remote_internal.h>
 #include <crm/lrmd_internal.h>
 
@@ -111,14 +109,11 @@ lrmd_remote_client_msg(gpointer data)
 
     request = pcmk__remote_message_xml(client->remote);
     while (request) {
-        crm_element_value_int(request, F_LRMD_REMOTE_MSG_ID, &id);
+        crm_element_value_int(request, PCMK__XA_LRMD_REMOTE_MSG_ID, &id);
         crm_trace("Processing remote client request %d", id);
         if (!client->name) {
-            const char *value = crm_element_value(request, F_LRMD_CLIENTNAME);
-
-            if (value) {
-                client->name = strdup(value);
-            }
+            client->name = crm_element_value_copy(request,
+                                                  PCMK__XA_LRMD_CLIENTNAME);
         }
 
         lrmd_call_id++;
@@ -126,9 +121,9 @@ lrmd_remote_client_msg(gpointer data)
             lrmd_call_id = 1;
         }
 
-        crm_xml_add(request, F_LRMD_CLIENTID, client->id);
-        crm_xml_add(request, F_LRMD_CLIENTNAME, client->name);
-        crm_xml_add_int(request, F_LRMD_CALLID, lrmd_call_id);
+        crm_xml_add(request, PCMK__XA_LRMD_CLIENTID, client->id);
+        crm_xml_add(request, PCMK__XA_LRMD_CLIENTNAME, client->name);
+        crm_xml_add_int(request, PCMK__XA_LRMD_CALLID, lrmd_call_id);
 
         process_lrmd_message(client, id, request);
         free_xml(request);
@@ -175,6 +170,7 @@ lrmd_remote_client_destroy(gpointer user_data)
         gnutls_bye(*client->remote->tls_session, GNUTLS_SHUT_RDWR);
         gnutls_deinit(*client->remote->tls_session);
         gnutls_free(client->remote->tls_session);
+        client->remote->tls_session = NULL;
         close(csock);
     }
 
@@ -229,7 +225,7 @@ lrmd_remote_listen(gpointer data)
     }
 
     new_client = pcmk__new_unauth_client(NULL);
-    new_client->remote = calloc(1, sizeof(pcmk__remote_t));
+    new_client->remote = pcmk__assert_alloc(1, sizeof(pcmk__remote_t));
     pcmk__set_client_flags(new_client, pcmk__client_tls);
     new_client->remote->tls_session = session;
 
diff --git a/daemons/fenced/cts-fence-helper.c b/daemons/fenced/cts-fence-helper.c
index 07bd500..edde8ca 100644
--- a/daemons/fenced/cts-fence-helper.c
+++ b/daemons/fenced/cts-fence-helper.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2023 the Pacemaker project contributors
+ * Copyright 2009-2024 the Pacemaker project contributors
  *
  * This source code is licensed under the GNU General Public License version 2
  * or later (GPLv2+) WITHOUT ANY WARRANTY.
@@ -20,7 +20,6 @@
 #include <fcntl.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/ipc.h>
 #include <crm/cluster/internal.h>
 
@@ -164,8 +163,10 @@ passive_test(void)
         stonith_api_delete(st);
         crm_exit(CRM_EX_DISCONNECT);
     }
-    st->cmds->register_notification(st, T_STONITH_NOTIFY_DISCONNECT, st_callback);
-    st->cmds->register_notification(st, T_STONITH_NOTIFY_FENCE, st_callback);
+    st->cmds->register_notification(st, PCMK__VALUE_ST_NOTIFY_DISCONNECT,
+                                    st_callback);
+    st->cmds->register_notification(st, PCMK__VALUE_ST_NOTIFY_FENCE,
+                                    st_callback);
     st->cmds->register_notification(st, STONITH_OP_DEVICE_ADD, st_callback);
     st->cmds->register_notification(st, STONITH_OP_DEVICE_DEL, st_callback);
     st->cmds->register_callback(st, 0, 120, st_opt_timeout_updates, NULL, "st_global_callback",
@@ -325,8 +326,10 @@ sanity_tests(void)
         stonith_api_delete(st);
         crm_exit(CRM_EX_DISCONNECT);
     }
-    st->cmds->register_notification(st, T_STONITH_NOTIFY_DISCONNECT, st_callback);
-    st->cmds->register_notification(st, T_STONITH_NOTIFY_FENCE, st_callback);
+    st->cmds->register_notification(st, PCMK__VALUE_ST_NOTIFY_DISCONNECT,
+                                    st_callback);
+    st->cmds->register_notification(st, PCMK__VALUE_ST_NOTIFY_FENCE,
+                                    st_callback);
     st->cmds->register_notification(st, STONITH_OP_DEVICE_ADD, st_callback);
     st->cmds->register_notification(st, STONITH_OP_DEVICE_DEL, st_callback);
     st->cmds->register_callback(st, 0, 120, st_opt_timeout_updates, NULL, "st_global_callback",
diff --git a/daemons/fenced/fenced_cib.c b/daemons/fenced/fenced_cib.c
index e11bf68..6bf0e6f 100644
--- a/daemons/fenced/fenced_cib.c
+++ b/daemons/fenced/fenced_cib.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2023 the Pacemaker project contributors
+ * Copyright 2009-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -15,7 +15,6 @@
 #include <libxml/xpath.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/xml.h>
 
 #include <crm/cluster/internal.h>
@@ -55,11 +54,12 @@ node_has_attr(const char *node, const char *name, const char *value)
      */
     xpath = g_string_sized_new(256);
     pcmk__g_strcat(xpath,
-                   "//" XML_CIB_TAG_NODES "/" XML_CIB_TAG_NODE
-                   "[@" XML_ATTR_UNAME "='", node, "']/" XML_TAG_ATTR_SETS
-                   "/" XML_CIB_TAG_NVPAIR
-                   "[@" XML_NVPAIR_ATTR_NAME "='", name, "' "
-                   "and @" XML_NVPAIR_ATTR_VALUE "='", value, "']", NULL);
+                   "//" PCMK_XE_NODES "/" PCMK_XE_NODE
+                   "[@" PCMK_XA_UNAME "='", node, "']"
+                   "/" PCMK_XE_INSTANCE_ATTRIBUTES
+                   "/" PCMK_XE_NVPAIR
+                   "[@" PCMK_XA_NAME "='", name, "' "
+                   "and @" PCMK_XA_VALUE "='", value, "']", NULL);
 
     match = get_xpath_object((const char *) xpath->str, local_cib, LOG_NEVER);
 
@@ -76,7 +76,7 @@ add_topology_level(xmlNode *match)
     CRM_CHECK(match != NULL, return);
 
     fenced_register_level(match, &desc, &result);
-    fenced_send_level_notification(STONITH_OP_LEVEL_ADD, &result, desc);
+    fenced_send_config_notification(STONITH_OP_LEVEL_ADD, &result, desc);
     pcmk__reset_result(&result);
     free(desc);
 }
@@ -86,14 +86,14 @@ topology_remove_helper(const char *node, int level)
 {
     char *desc = NULL;
     pcmk__action_result_t result = PCMK__UNKNOWN_RESULT;
-    xmlNode *data = create_xml_node(NULL, XML_TAG_FENCING_LEVEL);
+    xmlNode *data = pcmk__xe_create(NULL, PCMK_XE_FENCING_LEVEL);
 
-    crm_xml_add(data, F_STONITH_ORIGIN, __func__);
-    crm_xml_add_int(data, XML_ATTR_STONITH_INDEX, level);
-    crm_xml_add(data, XML_ATTR_STONITH_TARGET, node);
+    crm_xml_add(data, PCMK__XA_ST_ORIGIN, __func__);
+    crm_xml_add_int(data, PCMK_XA_INDEX, level);
+    crm_xml_add(data, PCMK_XA_TARGET, node);
 
     fenced_unregister_level(data, &desc, &result);
-    fenced_send_level_notification(STONITH_OP_LEVEL_DEL, &result, desc);
+    fenced_send_config_notification(STONITH_OP_LEVEL_DEL, &result, desc);
     pcmk__reset_result(&result);
     free_xml(data);
     free(desc);
@@ -108,7 +108,7 @@ remove_topology_level(xmlNode *match)
     CRM_CHECK(match != NULL, return);
 
     key = stonith_level_key(match, fenced_target_by_unknown);
-    crm_element_value_int(match, XML_ATTR_STONITH_INDEX, &index);
+    crm_element_value_int(match, PCMK_XA_INDEX, &index);
     topology_remove_helper(key, index);
     free(key);
 }
@@ -149,7 +149,7 @@ void
 fencing_topology_init(void)
 {
     xmlXPathObjectPtr xpathObj = NULL;
-    const char *xpath = "//" XML_TAG_FENCING_LEVEL;
+    const char *xpath = "//" PCMK_XE_FENCING_LEVEL;
 
     crm_trace("Full topology refresh");
     free_topology_list();
@@ -174,37 +174,41 @@ remove_cib_device(xmlXPathObjectPtr xpathObj)
 
         CRM_LOG_ASSERT(match != NULL);
         if(match != NULL) {
-            standard = crm_element_value(match, XML_AGENT_ATTR_CLASS);
+            standard = crm_element_value(match, PCMK_XA_CLASS);
         }
 
         if (!pcmk__str_eq(standard, PCMK_RESOURCE_CLASS_STONITH, pcmk__str_casei)) {
             continue;
         }
 
-        rsc_id = crm_element_value(match, XML_ATTR_ID);
+        rsc_id = crm_element_value(match, PCMK_XA_ID);
 
         stonith_device_remove(rsc_id, true);
     }
 }
 
+#define XPATH_WATCHDOG_TIMEOUT "//" PCMK_XE_NVPAIR      \
+                               "[@" PCMK_XA_NAME "='"   \
+                                    PCMK_OPT_STONITH_WATCHDOG_TIMEOUT "']"
+
 static void
 update_stonith_watchdog_timeout_ms(xmlNode *cib)
 {
-    long timeout_ms = 0;
+    long long timeout_ms = 0;
     xmlNode *stonith_watchdog_xml = NULL;
     const char *value = NULL;
 
-    stonith_watchdog_xml = get_xpath_object("//nvpair[@name='stonith-watchdog-timeout']",
-					    cib, LOG_NEVER);
+    stonith_watchdog_xml = get_xpath_object(XPATH_WATCHDOG_TIMEOUT, cib,
+                                            LOG_NEVER);
     if (stonith_watchdog_xml) {
-        value = crm_element_value(stonith_watchdog_xml, XML_NVPAIR_ATTR_VALUE);
+        value = crm_element_value(stonith_watchdog_xml, PCMK_XA_VALUE);
     }
     if (value) {
         timeout_ms = crm_get_msec(value);
     }
 
     if (timeout_ms < 0) {
-        timeout_ms = pcmk__auto_watchdog_timeout();
+        timeout_ms = pcmk__auto_stonith_watchdog_timeout();
     }
 
     stonith_watchdog_timeout_ms = timeout_ms;
@@ -221,9 +225,9 @@ cib_devices_update(void)
     stonith_device_t *device = NULL;
 
     crm_info("Updating devices to version %s.%s.%s",
-             crm_element_value(local_cib, XML_ATTR_GENERATION_ADMIN),
-             crm_element_value(local_cib, XML_ATTR_GENERATION),
-             crm_element_value(local_cib, XML_ATTR_NUMUPDATES));
+             crm_element_value(local_cib, PCMK_XA_ADMIN_EPOCH),
+             crm_element_value(local_cib, PCMK_XA_EPOCH),
+             crm_element_value(local_cib, PCMK_XA_NUM_UPDATES));
 
     g_hash_table_iter_init(&iter, device_list);
     while (g_hash_table_iter_next(&iter, NULL, (void **)&device)) {
@@ -256,7 +260,9 @@ update_cib_stonith_devices_v1(const char *event, xmlNode * msg)
     xmlXPathObjectPtr xpath_obj = NULL;
 
     /* process new constraints */
-    xpath_obj = xpath_search(msg, "//" F_CIB_UPDATE_RESULT "//" XML_CONS_TAG_RSC_LOCATION);
+    xpath_obj = xpath_search(msg,
+                             "//" PCMK__XE_CIB_UPDATE_RESULT
+                             "//" PCMK_XE_RSC_LOCATION);
     if (numXpathResults(xpath_obj) > 0) {
         int max = numXpathResults(xpath_obj), lpc = 0;
 
@@ -273,14 +279,20 @@ update_cib_stonith_devices_v1(const char *event, xmlNode * msg)
     freeXpathObject(xpath_obj);
 
     /* process deletions */
-    xpath_obj = xpath_search(msg, "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_REMOVED "//" XML_CIB_TAG_RESOURCE);
+    xpath_obj = xpath_search(msg,
+                             "//" PCMK__XE_CIB_UPDATE_RESULT
+                             "//" PCMK__XE_DIFF_REMOVED
+                             "//" PCMK_XE_PRIMITIVE);
     if (numXpathResults(xpath_obj) > 0) {
         remove_cib_device(xpath_obj);
     }
     freeXpathObject(xpath_obj);
 
     /* process additions */
-    xpath_obj = xpath_search(msg, "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_ADDED "//" XML_CIB_TAG_RESOURCE);
+    xpath_obj = xpath_search(msg,
+                             "//" PCMK__XE_CIB_UPDATE_RESULT
+                             "//" PCMK__XE_DIFF_ADDED
+                             "//" PCMK_XE_PRIMITIVE);
     if (numXpathResults(xpath_obj) > 0) {
         int max = numXpathResults(xpath_obj), lpc = 0;
 
@@ -289,8 +301,8 @@ update_cib_stonith_devices_v1(const char *event, xmlNode * msg)
             const char *standard = NULL;
             xmlNode *match = getXpathResult(xpath_obj, lpc);
 
-            rsc_id = crm_element_value(match, XML_ATTR_ID);
-            standard = crm_element_value(match, XML_AGENT_ATTR_CLASS);
+            rsc_id = crm_element_value(match, PCMK_XA_ID);
+            standard = crm_element_value(match, PCMK_XA_CLASS);
 
             if (!pcmk__str_eq(standard, PCMK_RESOURCE_CLASS_STONITH, pcmk__str_casei)) {
                 continue;
@@ -314,35 +326,39 @@ update_cib_stonith_devices_v2(const char *event, xmlNode * msg)
 {
     xmlNode *change = NULL;
     char *reason = NULL;
-    bool needs_update = FALSE;
-    xmlNode *patchset = get_message_xml(msg, F_CIB_UPDATE_RESULT);
+    xmlNode *wrapper = pcmk__xe_first_child(msg, PCMK__XE_CIB_UPDATE_RESULT,
+                                            NULL, NULL);
+    xmlNode *patchset = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
+
+    for (change = pcmk__xe_first_child(patchset, NULL, NULL, NULL);
+         change != NULL; change = pcmk__xe_next(change)) {
 
-    for (change = pcmk__xml_first_child(patchset); change != NULL;
-         change = pcmk__xml_next(change)) {
-        const char *op = crm_element_value(change, XML_DIFF_OP);
-        const char *xpath = crm_element_value(change, XML_DIFF_PATH);
+        const char *op = crm_element_value(change, PCMK_XA_OPERATION);
+        const char *xpath = crm_element_value(change, PCMK_XA_PATH);
         const char *shortpath = NULL;
 
-        if ((op == NULL) ||
-            (strcmp(op, "move") == 0) ||
-            strstr(xpath, "/"XML_CIB_TAG_STATUS)) {
+        if (pcmk__str_eq(op, PCMK_VALUE_MOVE, pcmk__str_null_matches)
+            || (strstr(xpath, "/" PCMK_XE_STATUS) != NULL)) {
             continue;
-        } else if (pcmk__str_eq(op, "delete", pcmk__str_casei) && strstr(xpath, "/"XML_CIB_TAG_RESOURCE)) {
+        }
+
+        if (pcmk__str_eq(op, PCMK_VALUE_DELETE, pcmk__str_none)
+            && (strstr(xpath, "/" PCMK_XE_PRIMITIVE) != NULL)) {
             const char *rsc_id = NULL;
             char *search = NULL;
             char *mutable = NULL;
 
-            if (strstr(xpath, XML_TAG_ATTR_SETS) ||
-                strstr(xpath, XML_TAG_META_SETS)) {
-                needs_update = TRUE;
-                pcmk__str_update(&reason,
-                                 "(meta) attribute deleted from resource");
+            if ((strstr(xpath, PCMK_XE_INSTANCE_ATTRIBUTES) != NULL)
+                || (strstr(xpath, PCMK_XE_META_ATTRIBUTES) != NULL)) {
+
+                reason = pcmk__str_copy("(meta) attribute deleted from "
+                                        "resource");
                 break;
             }
-            pcmk__str_update(&mutable, xpath);
-            rsc_id = strstr(mutable, "primitive[@" XML_ATTR_ID "=\'");
+            mutable = pcmk__str_copy(xpath);
+            rsc_id = strstr(mutable, PCMK_XE_PRIMITIVE "[@" PCMK_XA_ID "=\'");
             if (rsc_id != NULL) {
-                rsc_id += strlen("primitive[@" XML_ATTR_ID "=\'");
+                rsc_id += strlen(PCMK_XE_PRIMITIVE "[@" PCMK_XA_ID "=\'");
                 search = strchr(rsc_id, '\'');
             }
             if (search != NULL) {
@@ -355,30 +371,31 @@ update_cib_stonith_devices_v2(const char *event, xmlNode * msg)
             }
             free(mutable);
 
-        } else if (strstr(xpath, "/"XML_CIB_TAG_RESOURCES) ||
-                   strstr(xpath, "/"XML_CIB_TAG_CONSTRAINTS) ||
-                   strstr(xpath, "/"XML_CIB_TAG_RSCCONFIG)) {
+        } else if (strstr(xpath, "/" PCMK_XE_RESOURCES)
+                   || strstr(xpath, "/" PCMK_XE_CONSTRAINTS)
+                   || strstr(xpath, "/" PCMK_XE_RSC_DEFAULTS)) {
             shortpath = strrchr(xpath, '/'); CRM_ASSERT(shortpath);
             reason = crm_strdup_printf("%s %s", op, shortpath+1);
-            needs_update = TRUE;
             break;
         }
     }
 
-    if(needs_update) {
+    if (reason != NULL) {
         crm_info("Updating device list from CIB: %s", reason);
         cib_devices_update();
+        free(reason);
     } else {
         crm_trace("No updates for device list found in CIB");
     }
-    free(reason);
 }
 
 static void
 update_cib_stonith_devices(const char *event, xmlNode * msg)
 {
     int format = 1;
-    xmlNode *patchset = get_message_xml(msg, F_CIB_UPDATE_RESULT);
+    xmlNode *wrapper = pcmk__xe_first_child(msg, PCMK__XE_CIB_UPDATE_RESULT,
+                                            NULL, NULL);
+    xmlNode *patchset = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
     CRM_ASSERT(patchset);
     crm_element_value_int(patchset, PCMK_XA_FORMAT, &format);
@@ -465,17 +482,19 @@ remove_fencing_topology(xmlXPathObjectPtr xpathObj)
         xmlNode *match = getXpathResult(xpathObj, lpc);
 
         CRM_LOG_ASSERT(match != NULL);
-        if (match && crm_element_value(match, XML_DIFF_MARKER)) {
+        if (match && crm_element_value(match, PCMK__XA_CRM_DIFF_MARKER)) {
             /* Deletion */
             int index = 0;
             char *target = stonith_level_key(match, fenced_target_by_unknown);
 
-            crm_element_value_int(match, XML_ATTR_STONITH_INDEX, &index);
+            crm_element_value_int(match, PCMK_XA_INDEX, &index);
             if (target == NULL) {
-                crm_err("Invalid fencing target in element %s", ID(match));
+                crm_err("Invalid fencing target in element %s",
+                        pcmk__xe_id(match));
 
             } else if (index <= 0) {
-                crm_err("Invalid level for %s in element %s", target, ID(match));
+                crm_err("Invalid level for %s in element %s",
+                        target, pcmk__xe_id(match));
 
             } else {
                 topology_remove_helper(target, index);
@@ -491,21 +510,27 @@ update_fencing_topology(const char *event, xmlNode * msg)
     int format = 1;
     const char *xpath;
     xmlXPathObjectPtr xpathObj = NULL;
-    xmlNode *patchset = get_message_xml(msg, F_CIB_UPDATE_RESULT);
+    xmlNode *wrapper = pcmk__xe_first_child(msg, PCMK__XE_CIB_UPDATE_RESULT,
+                                            NULL, NULL);
+    xmlNode *patchset = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
     CRM_ASSERT(patchset);
     crm_element_value_int(patchset, PCMK_XA_FORMAT, &format);
 
     if(format == 1) {
         /* Process deletions (only) */
-        xpath = "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_REMOVED "//" XML_TAG_FENCING_LEVEL;
+        xpath = "//" PCMK__XE_CIB_UPDATE_RESULT
+                "//" PCMK__XE_DIFF_REMOVED
+                "//" PCMK_XE_FENCING_LEVEL;
         xpathObj = xpath_search(msg, xpath);
 
         remove_fencing_topology(xpathObj);
         freeXpathObject(xpathObj);
 
         /* Process additions and changes */
-        xpath = "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_ADDED "//" XML_TAG_FENCING_LEVEL;
+        xpath = "//" PCMK__XE_CIB_UPDATE_RESULT
+                "//" PCMK__XE_DIFF_ADDED
+                "//" PCMK_XE_FENCING_LEVEL;
         xpathObj = xpath_search(msg, xpath);
 
         register_fencing_topology(xpathObj);
@@ -518,33 +543,36 @@ update_fencing_topology(const char *event, xmlNode * msg)
 
         xml_patch_versions(patchset, add, del);
 
-        for (change = pcmk__xml_first_child(patchset); change != NULL;
-             change = pcmk__xml_next(change)) {
-            const char *op = crm_element_value(change, XML_DIFF_OP);
-            const char *xpath = crm_element_value(change, XML_DIFF_PATH);
+        for (change = pcmk__xe_first_child(patchset, NULL, NULL, NULL);
+             change != NULL; change = pcmk__xe_next(change)) {
+
+            const char *op = crm_element_value(change, PCMK_XA_OPERATION);
+            const char *xpath = crm_element_value(change, PCMK_XA_PATH);
 
             if(op == NULL) {
                 continue;
 
-            } else if(strstr(xpath, "/" XML_TAG_FENCING_LEVEL) != NULL) {
+            } else if(strstr(xpath, "/" PCMK_XE_FENCING_LEVEL) != NULL) {
                 /* Change to a specific entry */
 
                 crm_trace("Handling %s operation %d.%d.%d for %s", op, add[0], add[1], add[2], xpath);
-                if(strcmp(op, "move") == 0) {
+                if (strcmp(op, PCMK_VALUE_MOVE) == 0) {
                     continue;
 
-                } else if(strcmp(op, "create") == 0) {
+                } else if (strcmp(op, PCMK_VALUE_CREATE) == 0) {
                     add_topology_level(change->children);
 
-                } else if(strcmp(op, "modify") == 0) {
-                    xmlNode *match = first_named_child(change, XML_DIFF_RESULT);
+                } else if (strcmp(op, PCMK_VALUE_MODIFY) == 0) {
+                    xmlNode *match = pcmk__xe_first_child(change,
+                                                          PCMK_XE_CHANGE_RESULT,
+                                                          NULL, NULL);
 
                     if(match) {
                         remove_topology_level(match->children);
                         add_topology_level(match->children);
                     }
 
-                } else if(strcmp(op, "delete") == 0) {
+                } else if (strcmp(op, PCMK_VALUE_DELETE) == 0) {
                     /* Nuclear option, all we have is the path and an id... not enough to remove a specific entry */
                     crm_info("Re-initializing fencing topology after %s operation %d.%d.%d for %s",
                              op, add[0], add[1], add[2], xpath);
@@ -552,20 +580,23 @@ update_fencing_topology(const char *event, xmlNode * msg)
                     return;
                 }
 
-            } else if (strstr(xpath, "/" XML_TAG_FENCING_TOPOLOGY) != NULL) {
+            } else if (strstr(xpath, "/" PCMK_XE_FENCING_TOPOLOGY) != NULL) {
                 /* Change to the topology in general */
                 crm_info("Re-initializing fencing topology after top-level %s operation  %d.%d.%d for %s",
                          op, add[0], add[1], add[2], xpath);
                 fencing_topology_init();
                 return;
 
-            } else if (strstr(xpath, "/" XML_CIB_TAG_CONFIGURATION)) {
+            } else if (strstr(xpath, "/" PCMK_XE_CONFIGURATION)) {
                 /* Changes to the whole config section, possibly including the topology as a whild */
-                if(first_named_child(change, XML_TAG_FENCING_TOPOLOGY) == NULL) {
+                if (pcmk__xe_first_child(change, PCMK_XE_FENCING_TOPOLOGY, NULL,
+                                         NULL) == NULL) {
                     crm_trace("Nothing for us in %s operation %d.%d.%d for %s.",
                               op, add[0], add[1], add[2], xpath);
 
-                } else if(strcmp(op, "delete") == 0 || strcmp(op, "create") == 0) {
+                } else if (pcmk__str_any_of(op,
+                                            PCMK_VALUE_DELETE,
+                                            PCMK_VALUE_CREATE, NULL)) {
                     crm_info("Re-initializing fencing topology after top-level %s operation %d.%d.%d for %s.",
                              op, add[0], add[1], add[2], xpath);
                     fencing_topology_init();
@@ -586,7 +617,7 @@ update_fencing_topology(const char *event, xmlNode * msg)
 static void
 update_cib_cache_cb(const char *event, xmlNode * msg)
 {
-    long timeout_ms_saved = stonith_watchdog_timeout_ms;
+    long long timeout_ms_saved = stonith_watchdog_timeout_ms;
     bool need_full_refresh = false;
 
     if(!have_cib_devices) {
@@ -603,14 +634,18 @@ update_cib_cache_cb(const char *event, xmlNode * msg)
      */
     if (local_cib != NULL) {
         int rc = pcmk_ok;
+        xmlNode *wrapper = NULL;
         xmlNode *patchset = NULL;
 
-        crm_element_value_int(msg, F_CIB_RC, &rc);
+        crm_element_value_int(msg, PCMK__XA_CIB_RC, &rc);
         if (rc != pcmk_ok) {
             return;
         }
 
-        patchset = get_message_xml(msg, F_CIB_UPDATE_RESULT);
+        wrapper = pcmk__xe_first_child(msg, PCMK__XE_CIB_UPDATE_RESULT, NULL,
+                                       NULL);
+        patchset = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
+
         rc = xml_apply_patchset(local_cib, patchset, TRUE);
         switch (rc) {
             case pcmk_ok:
@@ -660,7 +695,7 @@ init_cib_cache_cb(xmlNode * msg, int call_id, int rc, xmlNode * output, void *us
 {
     crm_info("Updating device list from CIB");
     have_cib_devices = TRUE;
-    local_cib = copy_xml(output);
+    local_cib = pcmk__xml_copy(NULL, output);
 
     pcmk__refresh_node_caches_from_cib(local_cib);
     update_stonith_watchdog_timeout_ms(local_cib);
@@ -693,7 +728,7 @@ void
 fenced_cib_cleanup(void)
 {
     if (cib_api != NULL) {
-        cib_api->cmds->del_notify_callback(cib_api, T_CIB_DIFF_NOTIFY,
+        cib_api->cmds->del_notify_callback(cib_api, PCMK__VALUE_CIB_DIFF_NOTIFY,
                                            update_cib_cache_cb);
         cib__clean_up_connection(&cib_api);
     }
@@ -719,16 +754,20 @@ setup_cib(void)
 
     if (rc != pcmk_ok) {
         crm_err("Could not connect to the CIB manager: %s (%d)", pcmk_strerror(rc), rc);
+        return;
+    }
 
-    } else if (pcmk_ok !=
-               cib_api->cmds->add_notify_callback(cib_api, T_CIB_DIFF_NOTIFY, update_cib_cache_cb)) {
+    rc = cib_api->cmds->add_notify_callback(cib_api,
+                                            PCMK__VALUE_CIB_DIFF_NOTIFY,
+                                            update_cib_cache_cb);
+    if (rc != pcmk_ok) {
         crm_err("Could not set CIB notification callback");
-
-    } else {
-        rc = cib_api->cmds->query(cib_api, NULL, NULL, cib_scope_local);
-        cib_api->cmds->register_callback(cib_api, rc, 120, FALSE, NULL, "init_cib_cache_cb",
-                                         init_cib_cache_cb);
-        cib_api->cmds->set_connection_dnotify(cib_api, cib_connection_destroy);
-        crm_info("Watching for fencing topology changes");
+        return;
     }
+
+    rc = cib_api->cmds->query(cib_api, NULL, NULL, cib_scope_local);
+    cib_api->cmds->register_callback(cib_api, rc, 120, FALSE, NULL,
+                                     "init_cib_cache_cb", init_cib_cache_cb);
+    cib_api->cmds->set_connection_dnotify(cib_api, cib_connection_destroy);
+    crm_info("Watching for fencing topology changes");
 }
diff --git a/daemons/fenced/fenced_commands.c b/daemons/fenced/fenced_commands.c
index 7a62ed6..223a701 100644
--- a/daemons/fenced/fenced_commands.c
+++ b/daemons/fenced/fenced_commands.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2023 the Pacemaker project contributors
+ * Copyright 2009-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -23,7 +23,6 @@
 #include <ctype.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_internal.h>
 #include <crm/cluster/internal.h>
@@ -129,7 +128,7 @@ static int
 get_action_delay_max(const stonith_device_t *device, const char *action)
 {
     const char *value = NULL;
-    int delay_max = 0;
+    guint delay_max = 0U;
 
     if (!pcmk__is_fencing_action(action)) {
         return 0;
@@ -137,10 +136,11 @@ get_action_delay_max(const stonith_device_t *device, const char *action)
 
     value = g_hash_table_lookup(device->params, PCMK_STONITH_DELAY_MAX);
     if (value) {
-       delay_max = crm_parse_interval_spec(value) / 1000;
+        pcmk_parse_interval_spec(value, &delay_max);
+        delay_max /= 1000;
     }
 
-    return delay_max;
+    return (int) delay_max;
 }
 
 static int
@@ -148,7 +148,7 @@ get_action_delay_base(const stonith_device_t *device, const char *action,
                       const char *target)
 {
     char *hash_value = NULL;
-    int delay_base = 0;
+    guint delay_base = 0U;
 
     if (!pcmk__is_fencing_action(action)) {
         return 0;
@@ -157,11 +157,9 @@ get_action_delay_base(const stonith_device_t *device, const char *action,
     hash_value = g_hash_table_lookup(device->params, PCMK_STONITH_DELAY_BASE);
 
     if (hash_value) {
-        char *value = strdup(hash_value);
+        char *value = pcmk__str_copy(hash_value);
         char *valptr = value;
 
-        CRM_ASSERT(value != NULL);
-
         if (target != NULL) {
             for (char *val = strtok(value, "; \t"); val != NULL; val = strtok(NULL, "; \t")) {
                 char *mapval = strchr(val, ':');
@@ -181,13 +179,14 @@ get_action_delay_base(const stonith_device_t *device, const char *action,
         }
 
         if (strchr(value, ':') == 0) {
-           delay_base = crm_parse_interval_spec(value) / 1000;
+            pcmk_parse_interval_spec(value, &delay_base);
+            delay_base /= 1000;
         }
 
         free(valptr);
     }
 
-    return delay_base;
+    return (int) delay_base;
 }
 
 /*!
@@ -232,7 +231,8 @@ get_action_timeout(const stonith_device_t *device, const char *action,
         snprintf(buffer, sizeof(buffer), "pcmk_%s_timeout", action);
         value = g_hash_table_lookup(device->params, buffer);
         if (value) {
-            return atoi(value);
+            long long timeout_ms = crm_get_msec(value);
+            return (int) QB_MIN(timeout_ms / 1000, INT_MAX);
         }
     }
     return default_timeout;
@@ -345,34 +345,33 @@ create_async_command(xmlNode *msg)
         return NULL;
     }
 
-    op = get_xpath_object("//@" F_STONITH_ACTION, msg, LOG_ERR);
+    op = get_xpath_object("//@" PCMK__XE_ST_DEVICE_ACTION, msg, LOG_ERR);
     if (op == NULL) {
         return NULL;
     }
 
-    cmd = calloc(1, sizeof(async_command_t));
-    CRM_ASSERT(cmd != NULL);
+    cmd = pcmk__assert_alloc(1, sizeof(async_command_t));
 
     // All messages must include these
-    cmd->action = crm_element_value_copy(op, F_STONITH_ACTION);
-    cmd->op = crm_element_value_copy(msg, F_STONITH_OPERATION);
-    cmd->client = crm_element_value_copy(msg, F_STONITH_CLIENTID);
+    cmd->action = crm_element_value_copy(op, PCMK__XA_ST_DEVICE_ACTION);
+    cmd->op = crm_element_value_copy(msg, PCMK__XA_ST_OP);
+    cmd->client = crm_element_value_copy(msg, PCMK__XA_ST_CLIENTID);
     if ((cmd->action == NULL) || (cmd->op == NULL) || (cmd->client == NULL)) {
         free_async_command(cmd);
         return NULL;
     }
 
-    crm_element_value_int(msg, F_STONITH_CALLID, &(cmd->id));
-    crm_element_value_int(msg, F_STONITH_CALLOPTS, &(cmd->options));
-    crm_element_value_int(msg, F_STONITH_DELAY, &(cmd->start_delay));
-    crm_element_value_int(msg, F_STONITH_TIMEOUT, &(cmd->default_timeout));
+    crm_element_value_int(msg, PCMK__XA_ST_CALLID, &(cmd->id));
+    crm_element_value_int(msg, PCMK__XA_ST_CALLOPT, &(cmd->options));
+    crm_element_value_int(msg, PCMK__XA_ST_DELAY, &(cmd->start_delay));
+    crm_element_value_int(msg, PCMK__XA_ST_TIMEOUT, &(cmd->default_timeout));
     cmd->timeout = cmd->default_timeout;
 
-    cmd->origin = crm_element_value_copy(msg, F_ORIG);
-    cmd->remote_op_id = crm_element_value_copy(msg, F_STONITH_REMOTE_OP_ID);
-    cmd->client_name = crm_element_value_copy(msg, F_STONITH_CLIENTNAME);
-    cmd->target = crm_element_value_copy(op, F_STONITH_TARGET);
-    cmd->device = crm_element_value_copy(op, F_STONITH_DEVICE);
+    cmd->origin = crm_element_value_copy(msg, PCMK__XA_SRC);
+    cmd->remote_op_id = crm_element_value_copy(msg, PCMK__XA_ST_REMOTE_OP);
+    cmd->client_name = crm_element_value_copy(msg, PCMK__XA_ST_CLIENTNAME);
+    cmd->target = crm_element_value_copy(op, PCMK__XA_ST_TARGET);
+    cmd->device = crm_element_value_copy(op, PCMK__XA_ST_DEVICE_ID);
 
     cmd->done_cb = st_child_done;
 
@@ -645,12 +644,13 @@ schedule_stonith_command(async_command_t * cmd, stonith_device_t * device)
     }
 
     if (device->include_nodeid && (cmd->target != NULL)) {
-        crm_node_t *node = crm_get_peer(0, cmd->target);
+        crm_node_t *node = pcmk__get_node(0, cmd->target, NULL,
+                                          pcmk__node_search_cluster_member);
 
         cmd->target_nodeid = node->id;
     }
 
-    cmd->device = strdup(device->id);
+    cmd->device = pcmk__str_copy(device->id);
     cmd->timeout = get_action_timeout(device, cmd->action, cmd->default_timeout);
 
     if (cmd->remote_op_id) {
@@ -785,7 +785,7 @@ build_port_aliases(const char *hostmap, GList ** targets)
             case ':':
                 if (lpc > last) {
                     free(name);
-                    name = calloc(1, 1 + lpc - last);
+                    name = pcmk__assert_alloc(1, 1 + lpc - last);
                     memcpy(name, hostmap + last, lpc - last);
                 }
                 last = lpc + 1;
@@ -801,7 +801,7 @@ build_port_aliases(const char *hostmap, GList ** targets)
                     char *value = NULL;
                     int k = 0;
 
-                    value = calloc(1, 1 + lpc - last);
+                    value = pcmk__assert_alloc(1, 1 + lpc - last);
                     memcpy(value, hostmap + last, lpc - last);
 
                     for (int i = 0; value[i] != '\0'; i++) {
@@ -814,7 +814,7 @@ build_port_aliases(const char *hostmap, GList ** targets)
                     crm_debug("Adding alias '%s'='%s'", name, value);
                     g_hash_table_replace(aliases, name, value);
                     if (targets) {
-                        *targets = g_list_append(*targets, strdup(value));
+                        *targets = g_list_append(*targets, pcmk__str_copy(value));
                     }
                     value = NULL;
                     name = NULL;
@@ -888,10 +888,10 @@ get_agent_metadata(const char *agent, xmlNode ** metadata)
             crm_err("Could not retrieve metadata for fencing agent %s", agent);
             return EAGAIN;
         }
-        g_hash_table_replace(metadata_cache, strdup(agent), buffer);
+        g_hash_table_replace(metadata_cache, pcmk__str_copy(agent), buffer);
     }
 
-    *metadata = string2xml(buffer);
+    *metadata = pcmk__xml_parse(buffer);
     return pcmk_rc_ok;
 }
 
@@ -908,7 +908,8 @@ is_nodeid_required(xmlNode * xml)
         return FALSE;
     }
 
-    xpath = xpath_search(xml, "//parameter[@name='nodeid']");
+    xpath = xpath_search(xml,
+                         "//" PCMK_XE_PARAMETER "[@" PCMK_XA_NAME "='nodeid']");
     if (numXpathResults(xpath)  <= 0) {
         freeXpathObject(xpath);
         return FALSE;
@@ -944,7 +945,7 @@ read_action_metadata(stonith_device_t *device)
         CRM_LOG_ASSERT(match != NULL);
         if(match == NULL) { continue; };
 
-        action = crm_element_value(match, "name");
+        action = crm_element_value(match, PCMK_XA_NAME);
 
         if (pcmk__str_eq(action, PCMK_ACTION_LIST, pcmk__str_none)) {
             stonith__set_device_flags(device->flags, device->id,
@@ -956,16 +957,23 @@ read_action_metadata(stonith_device_t *device)
             stonith__set_device_flags(device->flags, device->id,
                                       st_device_supports_reboot);
         } else if (pcmk__str_eq(action, PCMK_ACTION_ON, pcmk__str_none)) {
-            /* "automatic" means the cluster will unfence node when it joins */
-            /* "required" is a deprecated synonym for "automatic" */
-            if (pcmk__xe_attr_is_true(match, "automatic") || pcmk__xe_attr_is_true(match, "required")) {
+            /* PCMK_XA_AUTOMATIC means the cluster will unfence a node when it
+             * joins.
+             *
+             * @COMPAT PCMK__XA_REQUIRED is a deprecated synonym for
+             * PCMK_XA_AUTOMATIC.
+             */
+            if (pcmk__xe_attr_is_true(match, PCMK_XA_AUTOMATIC)
+                || pcmk__xe_attr_is_true(match, PCMK__XA_REQUIRED)) {
                 device->automatic_unfencing = TRUE;
             }
             stonith__set_device_flags(device->flags, device->id,
                                       st_device_supports_on);
         }
 
-        if ((action != NULL) && pcmk__xe_attr_is_true(match, "on_target")) {
+        if ((action != NULL)
+            && pcmk__xe_attr_is_true(match, PCMK_XA_ON_TARGET)) {
+
             pcmk__add_word(&(device->on_target_actions), 64, action);
         }
     }
@@ -993,7 +1001,7 @@ map_action(GHashTable *params, const char *action, const char *value)
     } else {
         crm_warn("Mapping %s='%s' to %s='%s'",
                  STONITH_ATTR_ACTION_OP, value, key, value);
-        g_hash_table_insert(params, key, strdup(value));
+        g_hash_table_insert(params, key, pcmk__str_copy(value));
     }
 }
 
@@ -1023,7 +1031,8 @@ xml2device_params(const char *name, const xmlNode *dev)
             crm_warn("Ignoring empty '%s' parameter", STONITH_ATTR_ACTION_OP);
 
         } else if (strcmp(value, PCMK_ACTION_REBOOT) == 0) {
-            crm_warn("Ignoring %s='reboot' (see stonith-action cluster property instead)",
+            crm_warn("Ignoring %s='reboot' (see " PCMK_OPT_STONITH_ACTION
+                     " cluster property instead)",
                      STONITH_ATTR_ACTION_OP);
 
         } else if (strcmp(value, PCMK_ACTION_OFF) == 0) {
@@ -1050,15 +1059,15 @@ target_list_type(stonith_device_t * dev)
     if (check_type == NULL) {
 
         if (g_hash_table_lookup(dev->params, PCMK_STONITH_HOST_LIST)) {
-            check_type = "static-list";
+            check_type = PCMK_VALUE_STATIC_LIST;
         } else if (g_hash_table_lookup(dev->params, PCMK_STONITH_HOST_MAP)) {
-            check_type = "static-list";
+            check_type = PCMK_VALUE_STATIC_LIST;
         } else if (pcmk_is_set(dev->flags, st_device_supports_list)) {
-            check_type = "dynamic-list";
+            check_type = PCMK_VALUE_DYNAMIC_LIST;
         } else if (pcmk_is_set(dev->flags, st_device_supports_status)) {
-            check_type = "status";
+            check_type = PCMK_VALUE_STATUS;
         } else {
-            check_type = PCMK__VALUE_NONE;
+            check_type = PCMK_VALUE_NONE;
         }
     }
 
@@ -1070,17 +1079,15 @@ build_device_from_xml(xmlNode *dev)
 {
     const char *value;
     stonith_device_t *device = NULL;
-    char *agent = crm_element_value_copy(dev, "agent");
+    char *agent = crm_element_value_copy(dev, PCMK_XA_AGENT);
 
     CRM_CHECK(agent != NULL, return device);
 
-    device = calloc(1, sizeof(stonith_device_t));
-
-    CRM_CHECK(device != NULL, {free(agent); return device;});
+    device = pcmk__assert_alloc(1, sizeof(stonith_device_t));
 
-    device->id = crm_element_value_copy(dev, XML_ATTR_ID);
+    device->id = crm_element_value_copy(dev, PCMK_XA_ID);
     device->agent = agent;
-    device->namespace = crm_element_value_copy(dev, "namespace");
+    device->namespace = crm_element_value_copy(dev, PCMK__XA_NAMESPACE);
     device->params = xml2device_params(device->id, dev);
 
     value = g_hash_table_lookup(device->params, PCMK_STONITH_HOST_LIST);
@@ -1092,8 +1099,10 @@ build_device_from_xml(xmlNode *dev)
     device->aliases = build_port_aliases(value, &(device->targets));
 
     value = target_list_type(device);
-    if (!pcmk__str_eq(value, "static-list", pcmk__str_casei) && device->targets) {
-        /* Other than "static-list", dev-> targets is unnecessary. */
+    if (!pcmk__str_eq(value, PCMK_VALUE_STATIC_LIST, pcmk__str_casei)
+        && (device->targets != NULL)) {
+
+        // device->targets is necessary only with PCMK_VALUE_STATIC_LIST
         g_list_free_full(device->targets, free);
         device->targets = NULL;
     }
@@ -1125,8 +1134,8 @@ build_device_from_xml(xmlNode *dev)
         device->include_nodeid = is_nodeid_required(device->agent_metadata);
     }
 
-    value = crm_element_value(dev, "rsc_provides");
-    if (pcmk__str_eq(value, PCMK__VALUE_UNFENCING, pcmk__str_casei)) {
+    value = crm_element_value(dev, PCMK__XA_RSC_PROVIDES);
+    if (pcmk__str_eq(value, PCMK_VALUE_UNFENCING, pcmk__str_casei)) {
         device->automatic_unfencing = TRUE;
     }
 
@@ -1159,17 +1168,17 @@ schedule_internal_command(const char *origin,
 {
     async_command_t *cmd = NULL;
 
-    cmd = calloc(1, sizeof(async_command_t));
+    cmd = pcmk__assert_alloc(1, sizeof(async_command_t));
 
     cmd->id = -1;
     cmd->default_timeout = timeout ? timeout : 60;
     cmd->timeout = cmd->default_timeout;
-    cmd->action = strdup(action);
-    pcmk__str_update(&cmd->target, target);
-    cmd->device = strdup(device->id);
-    cmd->origin = strdup(origin);
-    cmd->client = strdup(crm_system_name);
-    cmd->client_name = strdup(crm_system_name);
+    cmd->action = pcmk__str_copy(action);
+    cmd->target = pcmk__str_copy(target);
+    cmd->device = pcmk__str_copy(device->id);
+    cmd->origin = pcmk__str_copy(origin);
+    cmd->client = pcmk__str_copy(crm_system_name);
+    cmd->client_name = pcmk__str_copy(crm_system_name);
 
     cmd->internal_user_data = internal_user_data;
     cmd->done_cb = done_cb; /* cmd, not internal_user_data, is passed to 'done_cb' as the userdata */
@@ -1292,13 +1301,13 @@ dynamic_list_search_cb(int pid, const pcmk__action_result_t *result,
                      ((result->exit_reason == NULL)? "" : ")"));
         }
 
-        /* Fall back to pcmk_host_check="status" if the user didn't explicitly
-         * specify "dynamic-list".
+        /* Fall back to pcmk_host_check=PCMK_VALUE_STATUS if the user didn't
+         * explicitly specify PCMK_VALUE_DYNAMIC_LIST
          */
         if (g_hash_table_lookup(dev->params, PCMK_STONITH_HOST_CHECK) == NULL) {
             crm_notice("Switching to pcmk_host_check='status' for %s", dev->id);
-            g_hash_table_replace(dev->params, strdup(PCMK_STONITH_HOST_CHECK),
-                                 strdup("status"));
+            pcmk__insert_dup(dev->params, PCMK_STONITH_HOST_CHECK,
+                             PCMK_VALUE_STATUS);
         }
     }
 
@@ -1330,7 +1339,7 @@ device_params_diff(GHashTable *first, GHashTable *second) {
 
         if(strstr(key, "CRM_meta") == key) {
             continue;
-        } else if(strcmp(key, "crm_feature_set") == 0) {
+        } else if (strcmp(key, PCMK_XA_CRM_FEATURE_SET) == 0) {
             continue;
         } else {
             char *other_value = g_hash_table_lookup(second, key);
@@ -1389,7 +1398,7 @@ stonith_device_register(xmlNode *dev, gboolean from_cib)
                      STONITH_WATCHDOG_AGENT_INTERNAL, NULL)) do {
         if (stonith_watchdog_timeout_ms <= 0) {
             crm_err("Ignoring watchdog fence device without "
-                    "stonith-watchdog-timeout set.");
+                    PCMK_OPT_STONITH_WATCHDOG_TIMEOUT " set.");
             rv = -ENODEV;
             /* fall through to cleanup & return */
         } else if (!pcmk__str_any_of(device->agent, STONITH_WATCHDOG_AGENT,
@@ -1419,9 +1428,8 @@ stonith_device_register(xmlNode *dev, gboolean from_cib)
             if (node_does_watchdog_fencing(stonith_our_uname)) {
                 g_list_free_full(device->targets, free);
                 device->targets = stonith__parse_targets(stonith_our_uname);
-                g_hash_table_replace(device->params,
-                                     strdup(PCMK_STONITH_HOST_LIST),
-                                     strdup(stonith_our_uname));
+                pcmk__insert_dup(device->params,
+                                 PCMK_STONITH_HOST_LIST, stonith_our_uname);
                 /* proceed as with any other stonith-device */
                 break;
             }
@@ -1578,18 +1586,18 @@ stonith_level_key(const xmlNode *level, enum fenced_target_by mode)
     }
     switch (mode) {
         case fenced_target_by_name:
-            return crm_element_value_copy(level, XML_ATTR_STONITH_TARGET);
+            return crm_element_value_copy(level, PCMK_XA_TARGET);
 
         case fenced_target_by_pattern:
-            return crm_element_value_copy(level, XML_ATTR_STONITH_TARGET_PATTERN);
+            return crm_element_value_copy(level, PCMK_XA_TARGET_PATTERN);
 
         case fenced_target_by_attribute:
             return crm_strdup_printf("%s=%s",
-                crm_element_value(level, XML_ATTR_STONITH_TARGET_ATTRIBUTE),
-                crm_element_value(level, XML_ATTR_STONITH_TARGET_VALUE));
+                crm_element_value(level, PCMK_XA_TARGET_ATTRIBUTE),
+                crm_element_value(level, PCMK_XA_TARGET_VALUE));
 
         default:
-            return crm_strdup_printf("unknown-%s", ID(level));
+            return crm_strdup_printf("unknown-%s", pcmk__xe_id(level));
     }
 }
 
@@ -1604,15 +1612,15 @@ stonith_level_key(const xmlNode *level, enum fenced_target_by mode)
 static enum fenced_target_by
 unpack_level_kind(const xmlNode *level)
 {
-    if (crm_element_value(level, XML_ATTR_STONITH_TARGET) != NULL) {
+    if (crm_element_value(level, PCMK_XA_TARGET) != NULL) {
         return fenced_target_by_name;
     }
-    if (crm_element_value(level, XML_ATTR_STONITH_TARGET_PATTERN) != NULL) {
+    if (crm_element_value(level, PCMK_XA_TARGET_PATTERN) != NULL) {
         return fenced_target_by_pattern;
     }
     if (!stand_alone /* if standalone, there's no attribute manager */
-        && (crm_element_value(level, XML_ATTR_STONITH_TARGET_ATTRIBUTE) != NULL)
-        && (crm_element_value(level, XML_ATTR_STONITH_TARGET_VALUE) != NULL)) {
+        && (crm_element_value(level, PCMK_XA_TARGET_ATTRIBUTE) != NULL)
+        && (crm_element_value(level, PCMK_XA_TARGET_VALUE) != NULL)) {
         return fenced_target_by_attribute;
     }
     return fenced_target_by_unknown;
@@ -1670,8 +1678,8 @@ unpack_level_request(xmlNode *xml, enum fenced_target_by *mode, char **target,
      * search by xpath, because it might give multiple hits if the XML is the
      * CIB.
      */
-    if ((xml != NULL) && !pcmk__xe_is(xml, XML_TAG_FENCING_LEVEL)) {
-        xml = get_xpath_object("//" XML_TAG_FENCING_LEVEL, xml, LOG_WARNING);
+    if ((xml != NULL) && !pcmk__xe_is(xml, PCMK_XE_FENCING_LEVEL)) {
+        xml = get_xpath_object("//" PCMK_XE_FENCING_LEVEL, xml, LOG_WARNING);
     }
 
     if (xml == NULL) {
@@ -1681,7 +1689,7 @@ unpack_level_request(xmlNode *xml, enum fenced_target_by *mode, char **target,
     } else {
         local_mode = unpack_level_kind(xml);
         local_target = stonith_level_key(xml, local_mode);
-        crm_element_value_int(xml, XML_ATTR_STONITH_INDEX, &local_id);
+        crm_element_value_int(xml, PCMK_XA_INDEX, &local_id);
         if (desc != NULL) {
             *desc = crm_strdup_printf("%s[%d]", local_target, local_id);
         }
@@ -1737,7 +1745,7 @@ fenced_register_level(xmlNode *msg, char **desc, pcmk__action_result_t *result)
     }
 
     // Ensure an ID was given (even the client API adds an ID)
-    if (pcmk__str_empty(ID(level))) {
+    if (pcmk__str_empty(pcmk__xe_id(level))) {
         crm_warn("Ignoring registration for topology level without ID");
         free(target);
         crm_log_xml_trace(level, "Bad level");
@@ -1749,12 +1757,12 @@ fenced_register_level(xmlNode *msg, char **desc, pcmk__action_result_t *result)
     // Ensure a valid target was specified
     if (mode == fenced_target_by_unknown) {
         crm_warn("Ignoring registration for topology level '%s' "
-                 "without valid target", ID(level));
+                 "without valid target", pcmk__xe_id(level));
         free(target);
         crm_log_xml_trace(level, "Bad level");
         pcmk__format_result(result, CRM_EX_INVALID_PARAM, PCMK_EXEC_INVALID,
                             "Invalid target for topology level '%s'",
-                            ID(level));
+                            pcmk__xe_id(level));
         return;
     }
 
@@ -1766,28 +1774,24 @@ fenced_register_level(xmlNode *msg, char **desc, pcmk__action_result_t *result)
         crm_log_xml_trace(level, "Bad level");
         pcmk__format_result(result, CRM_EX_INVALID_PARAM, PCMK_EXEC_INVALID,
                             "Invalid level number '%s' for topology level '%s'",
-                            pcmk__s(crm_element_value(level,
-                                                      XML_ATTR_STONITH_INDEX),
+                            pcmk__s(crm_element_value(level, PCMK_XA_INDEX),
                                     ""),
-                            ID(level));
+                            pcmk__xe_id(level));
         return;
     }
 
     /* Find or create topology table entry */
     tp = g_hash_table_lookup(topology, target);
     if (tp == NULL) {
-        tp = calloc(1, sizeof(stonith_topology_t));
-        if (tp == NULL) {
-            pcmk__set_result(result, CRM_EX_ERROR, PCMK_EXEC_ERROR,
-                             strerror(ENOMEM));
-            free(target);
-            return;
-        }
+        tp = pcmk__assert_alloc(1, sizeof(stonith_topology_t));
+
         tp->kind = mode;
         tp->target = target;
-        tp->target_value = crm_element_value_copy(level, XML_ATTR_STONITH_TARGET_VALUE);
-        tp->target_pattern = crm_element_value_copy(level, XML_ATTR_STONITH_TARGET_PATTERN);
-        tp->target_attribute = crm_element_value_copy(level, XML_ATTR_STONITH_TARGET_ATTRIBUTE);
+        tp->target_value = crm_element_value_copy(level, PCMK_XA_TARGET_VALUE);
+        tp->target_pattern = crm_element_value_copy(level,
+                                                    PCMK_XA_TARGET_PATTERN);
+        tp->target_attribute = crm_element_value_copy(level,
+                                                      PCMK_XA_TARGET_ATTRIBUTE);
 
         g_hash_table_replace(topology, tp->target, tp);
         crm_trace("Added %s (%d) to the topology (%d active entries)",
@@ -1801,12 +1805,12 @@ fenced_register_level(xmlNode *msg, char **desc, pcmk__action_result_t *result)
                  tp->target, id);
     }
 
-    devices = parse_device_list(crm_element_value(level, XML_ATTR_STONITH_DEVICES));
+    devices = parse_device_list(crm_element_value(level, PCMK_XA_DEVICES));
     for (dIter = devices; dIter; dIter = dIter->next) {
         const char *device = dIter->value;
 
         crm_trace("Adding device '%s' for %s[%d]", device, tp->target, id);
-        tp->levels[id] = g_list_append(tp->levels[id], strdup(device));
+        tp->levels[id] = g_list_append(tp->levels[id], pcmk__str_copy(device));
     }
     stonith_key_value_freeall(devices, 1, 1);
 
@@ -1857,12 +1861,11 @@ fenced_unregister_level(xmlNode *msg, char **desc,
         crm_log_xml_trace(level, "Bad level");
         pcmk__format_result(result, CRM_EX_INVALID_PARAM, PCMK_EXEC_INVALID,
                             "Invalid level number '%s' for topology level %s",
-                            pcmk__s(crm_element_value(level,
-                                                      XML_ATTR_STONITH_INDEX),
+                            pcmk__s(crm_element_value(level, PCMK_XA_INDEX),
                                     "<null>"),
 
                             // Client API doesn't add ID to unregistration XML
-                            pcmk__s(ID(level), ""));
+                            pcmk__s(pcmk__xe_id(level), ""));
         return;
     }
 
@@ -1906,26 +1909,29 @@ list_to_string(GList *list, const char *delim, gboolean terminate_with_delim)
     char *rv;
     GList *gIter;
 
+    char *pos = NULL;
+    const char *lead_delim = "";
+
     for (gIter = list; gIter != NULL; gIter = gIter->next) {
         const char *value = (const char *) gIter->data;
 
         alloc_size += strlen(value);
     }
-    rv = calloc(alloc_size, sizeof(char));
-    if (rv) {
-        char *pos = rv;
-        const char *lead_delim = "";
 
-        for (gIter = list; gIter != NULL; gIter = gIter->next) {
-            const char *value = (const char *) gIter->data;
+    rv = pcmk__assert_alloc(alloc_size, sizeof(char));
+    pos = rv;
 
-            pos = &pos[sprintf(pos, "%s%s", lead_delim, value)];
-            lead_delim = delim;
-        }
-        if (max && terminate_with_delim) {
-            sprintf(pos, "%s", delim);
-        }
+    for (gIter = list; gIter != NULL; gIter = gIter->next) {
+        const char *value = (const char *) gIter->data;
+
+        pos = &pos[sprintf(pos, "%s%s", lead_delim, value)];
+        lead_delim = delim;
+    }
+
+    if (max && terminate_with_delim) {
+        sprintf(pos, "%s", delim);
     }
+
     return rv;
 }
 
@@ -1947,10 +1953,11 @@ list_to_string(GList *list, const char *delim, gboolean terminate_with_delim)
 static void
 execute_agent_action(xmlNode *msg, pcmk__action_result_t *result)
 {
-    xmlNode *dev = get_xpath_object("//" F_STONITH_DEVICE, msg, LOG_ERR);
-    xmlNode *op = get_xpath_object("//@" F_STONITH_ACTION, msg, LOG_ERR);
-    const char *id = crm_element_value(dev, F_STONITH_DEVICE);
-    const char *action = crm_element_value(op, F_STONITH_ACTION);
+    xmlNode *dev = get_xpath_object("//" PCMK__XE_ST_DEVICE_ID, msg, LOG_ERR);
+    xmlNode *op = get_xpath_object("//@" PCMK__XE_ST_DEVICE_ACTION, msg,
+                                   LOG_ERR);
+    const char *id = crm_element_value(dev, PCMK__XA_ST_DEVICE_ID);
+    const char *action = crm_element_value(op, PCMK__XA_ST_DEVICE_ACTION);
     async_command_t *cmd = NULL;
     stonith_device_t *device = NULL;
 
@@ -2023,7 +2030,8 @@ search_devices_record_result(struct device_search_s *search, const char *device,
                 return;
             }
         }
-        search->capable = g_list_append(search->capable, strdup(device));
+        search->capable = g_list_append(search->capable,
+                                        pcmk__str_copy(device));
     }
 
     if (search->replies_needed == search->replies_received) {
@@ -2158,10 +2166,12 @@ can_fence_host_with_device(stonith_device_t *dev,
     // Check eligibility as specified by pcmk_host_check
     check_type = target_list_type(dev);
     alias = g_hash_table_lookup(dev->aliases, target);
-    if (pcmk__str_eq(check_type, PCMK__VALUE_NONE, pcmk__str_casei)) {
+    if (pcmk__str_eq(check_type, PCMK_VALUE_NONE, pcmk__str_casei)) {
         can = TRUE;
 
-    } else if (pcmk__str_eq(check_type, "static-list", pcmk__str_casei)) {
+    } else if (pcmk__str_eq(check_type, PCMK_VALUE_STATIC_LIST,
+                            pcmk__str_casei)) {
+
         if (pcmk__str_in_list(target, dev->targets, pcmk__str_casei)) {
             can = TRUE;
         } else if (g_hash_table_lookup(dev->params, PCMK_STONITH_HOST_MAP)
@@ -2169,7 +2179,8 @@ can_fence_host_with_device(stonith_device_t *dev,
             can = TRUE;
         }
 
-    } else if (pcmk__str_eq(check_type, "dynamic-list", pcmk__str_casei)) {
+    } else if (pcmk__str_eq(check_type, PCMK_VALUE_DYNAMIC_LIST,
+                            pcmk__str_casei)) {
         time_t now = time(NULL);
 
         if (dev->targets == NULL || dev->targets_age + 60 < now) {
@@ -2177,8 +2188,10 @@ can_fence_host_with_device(stonith_device_t *dev,
                                                     search->per_device_timeout);
 
             if (device_timeout > search->per_device_timeout) {
-                crm_notice("Since the pcmk_list_timeout(%ds) parameter of %s is larger than stonith-timeout(%ds), timeout may occur",
-                    device_timeout, dev_id, search->per_device_timeout);
+                crm_notice("Since the pcmk_list_timeout (%ds) parameter of %s "
+                           "is larger than " PCMK_OPT_STONITH_TIMEOUT
+                           " (%ds), timeout may occur",
+                           device_timeout, dev_id, search->per_device_timeout);
             }
 
             crm_trace("Running '%s' to check whether %s is eligible to fence %s (%s)",
@@ -2196,12 +2209,14 @@ can_fence_host_with_device(stonith_device_t *dev,
             can = TRUE;
         }
 
-    } else if (pcmk__str_eq(check_type, "status", pcmk__str_casei)) {
+    } else if (pcmk__str_eq(check_type, PCMK_VALUE_STATUS, pcmk__str_casei)) {
         int device_timeout = get_action_timeout(dev, check_type, search->per_device_timeout);
 
         if (device_timeout > search->per_device_timeout) {
-            crm_notice("Since the pcmk_status_timeout(%ds) parameter of %s is larger than stonith-timeout(%ds), timeout may occur",
-                device_timeout, dev_id, search->per_device_timeout);
+            crm_notice("Since the pcmk_status_timeout (%ds) parameter of %s is "
+                       "larger than " PCMK_OPT_STONITH_TIMEOUT " (%ds), "
+                       "timeout may occur",
+                       device_timeout, dev_id, search->per_device_timeout);
         }
 
         crm_trace("Running '%s' to check whether %s is eligible to fence %s (%s)",
@@ -2246,16 +2261,10 @@ get_capable_devices(const char *host, const char *action, int timeout, bool suic
         return;
     }
 
-    search = calloc(1, sizeof(struct device_search_s));
-    if (!search) {
-        crm_crit("Cannot search for capable fence devices: %s",
-                 strerror(ENOMEM));
-        callback(NULL, user_data);
-        return;
-    }
+    search = pcmk__assert_alloc(1, sizeof(struct device_search_s));
 
-    pcmk__str_update(&search->host, host);
-    pcmk__str_update(&search->action, action);
+    search->host = pcmk__str_copy(host);
+    search->action = pcmk__str_copy(action);
     search->per_device_timeout = timeout;
     search->allow_suicide = suicide;
     search->callback = callback;
@@ -2303,28 +2312,31 @@ add_action_specific_attributes(xmlNode *xml, const char *action,
 
     CRM_CHECK(xml && action && device, return);
 
+    // PCMK__XA_ST_REQUIRED is currently used only for unfencing
     if (is_action_required(action, device)) {
         crm_trace("Action '%s' is required using %s", action, device->id);
-        crm_xml_add_int(xml, F_STONITH_DEVICE_REQUIRED, 1);
+        crm_xml_add_int(xml, PCMK__XA_ST_REQUIRED, 1);
     }
 
+    // pcmk_<action>_timeout if configured
     action_specific_timeout = get_action_timeout(device, action, 0);
     if (action_specific_timeout) {
-        crm_trace("Action '%s' has timeout %dms using %s",
+        crm_trace("Action '%s' has timeout %ds using %s",
                   action, action_specific_timeout, device->id);
-        crm_xml_add_int(xml, F_STONITH_ACTION_TIMEOUT, action_specific_timeout);
+        crm_xml_add_int(xml, PCMK__XA_ST_ACTION_TIMEOUT,
+                        action_specific_timeout);
     }
 
     delay_max = get_action_delay_max(device, action);
     if (delay_max > 0) {
         crm_trace("Action '%s' has maximum random delay %ds using %s",
                   action, delay_max, device->id);
-        crm_xml_add_int(xml, F_STONITH_DELAY_MAX, delay_max);
+        crm_xml_add_int(xml, PCMK__XA_ST_DELAY_MAX, delay_max);
     }
 
     delay_base = get_action_delay_base(device, action, target);
     if (delay_base > 0) {
-        crm_xml_add_int(xml, F_STONITH_DELAY_BASE, delay_base);
+        crm_xml_add_int(xml, PCMK__XA_ST_DELAY_BASE, delay_base);
     }
 
     if ((delay_max > 0) && (delay_base == 0)) {
@@ -2357,7 +2369,7 @@ add_disallowed(xmlNode *xml, const char *action, const stonith_device_t *device,
     if (!localhost_is_eligible(device, action, target, allow_suicide)) {
         crm_trace("Action '%s' using %s is disallowed for local host",
                   action, device->id);
-        pcmk__xe_set_bool_attr(xml, F_STONITH_ACTION_DISALLOWED, true);
+        pcmk__xe_set_bool_attr(xml, PCMK__XA_ST_ACTION_DISALLOWED, true);
     }
 }
 
@@ -2376,9 +2388,9 @@ add_action_reply(xmlNode *xml, const char *action,
                  const stonith_device_t *device, const char *target,
                  gboolean allow_suicide)
 {
-    xmlNode *child = create_xml_node(xml, F_STONITH_ACTION);
+    xmlNode *child = pcmk__xe_create(xml, PCMK__XE_ST_DEVICE_ACTION);
 
-    crm_xml_add(child, XML_ATTR_ID, action);
+    crm_xml_add(child, PCMK_XA_ID, action);
     add_action_specific_attributes(child, action, device, target);
     add_disallowed(child, action, device, target, allow_suicide);
 }
@@ -2402,8 +2414,11 @@ stonith_send_reply(const xmlNode *reply, int call_options,
     if (remote_peer == NULL) {
         do_local_reply(reply, client, call_options);
     } else {
-        send_cluster_message(crm_get_peer(0, remote_peer), crm_msg_stonith_ng,
-                             reply, FALSE);
+        const crm_node_t *node =
+            pcmk__get_node(0, remote_peer, NULL,
+                           pcmk__node_search_cluster_member);
+
+        pcmk__cluster_send_message(node, crm_msg_stonith_ng, reply);
     }
 }
 
@@ -2412,7 +2427,7 @@ stonith_query_capable_device_cb(GList * devices, void *user_data)
 {
     struct st_query_data *query = user_data;
     int available_devices = 0;
-    xmlNode *dev = NULL;
+    xmlNode *wrapper = NULL;
     xmlNode *list = NULL;
     GList *lpc = NULL;
     pcmk__client_t *client = NULL;
@@ -2426,12 +2441,15 @@ stonith_query_capable_device_cb(GList * devices, void *user_data)
         }
     }
 
-    /* Pack the results into XML */
-    list = create_xml_node(NULL, __func__);
-    crm_xml_add(list, F_STONITH_TARGET, query->target);
+    // Pack the results into XML
+    wrapper = pcmk__xe_create(query->reply, PCMK__XE_ST_CALLDATA);
+    list = pcmk__xe_create(wrapper, __func__);
+    crm_xml_add(list, PCMK__XA_ST_TARGET, query->target);
+
     for (lpc = devices; lpc != NULL; lpc = lpc->next) {
         stonith_device_t *device = g_hash_table_lookup(device_list, lpc->data);
         const char *action = query->action;
+        xmlNode *dev = NULL;
 
         if (!device) {
             /* It is possible the device got unregistered while
@@ -2441,12 +2459,15 @@ stonith_query_capable_device_cb(GList * devices, void *user_data)
 
         available_devices++;
 
-        dev = create_xml_node(list, F_STONITH_DEVICE);
-        crm_xml_add(dev, XML_ATTR_ID, device->id);
-        crm_xml_add(dev, "namespace", device->namespace);
-        crm_xml_add(dev, "agent", device->agent);
-        crm_xml_add_int(dev, F_STONITH_DEVICE_VERIFIED, device->verified);
-        crm_xml_add_int(dev, F_STONITH_DEVICE_SUPPORT_FLAGS, device->flags);
+        dev = pcmk__xe_create(list, PCMK__XE_ST_DEVICE_ID);
+        crm_xml_add(dev, PCMK_XA_ID, device->id);
+        crm_xml_add(dev, PCMK__XA_NAMESPACE, device->namespace);
+        crm_xml_add(dev, PCMK_XA_AGENT, device->agent);
+
+        // Has had successful monitor, list, or status on this node
+        crm_xml_add_int(dev, PCMK__XA_ST_MONITOR_VERIFIED, device->verified);
+
+        crm_xml_add_int(dev, PCMK__XA_ST_DEVICE_SUPPORT_FLAGS, device->flags);
 
         /* If the originating fencer wants to reboot the node, and we have a
          * capable device that doesn't support "reboot", remap to "off" instead.
@@ -2482,13 +2503,13 @@ stonith_query_capable_device_cb(GList * devices, void *user_data)
 
         /* A query without a target wants device parameters */
         if (query->target == NULL) {
-            xmlNode *attrs = create_xml_node(dev, XML_TAG_ATTRS);
+            xmlNode *attrs = pcmk__xe_create(dev, PCMK__XE_ATTRIBUTES);
 
             g_hash_table_foreach(device->params, hash2field, attrs);
         }
     }
 
-    crm_xml_add_int(list, F_STONITH_AVAILABLE_DEVICES, available_devices);
+    crm_xml_add_int(list, PCMK__XA_ST_AVAILABLE_DEVICES, available_devices);
     if (query->target) {
         crm_debug("Found %d matching device%s for target '%s'",
                   available_devices, pcmk__plural_s(available_devices),
@@ -2498,10 +2519,7 @@ stonith_query_capable_device_cb(GList * devices, void *user_data)
                   available_devices, pcmk__plural_s(available_devices));
     }
 
-    if (list != NULL) {
-        crm_log_xml_trace(list, "Add query results");
-        add_message_xml(query->reply, F_STONITH_CALLDATA, list);
-    }
+    crm_log_xml_trace(list, "query-result");
 
     stonith_send_reply(query->reply, query->call_options, query->remote_peer,
                        client);
@@ -2513,7 +2531,6 @@ done:
     free(query->target);
     free(query->action);
     free(query);
-    free_xml(list);
     g_list_free_full(devices, free);
 }
 
@@ -2542,14 +2559,16 @@ log_async_result(const async_command_t *cmd,
     if (pcmk__result_ok(result)) {
         log_level = (cmd->target == NULL)? LOG_DEBUG : LOG_NOTICE;
         if ((result->action_stdout != NULL)
-            && !pcmk__str_eq(cmd->action, "metadata", pcmk__str_none)) {
+            && !pcmk__str_eq(cmd->action, PCMK_ACTION_METADATA,
+                             pcmk__str_none)) {
             output_log_level = LOG_DEBUG;
         }
         next = NULL;
     } else {
         log_level = (cmd->target == NULL)? LOG_NOTICE : LOG_ERR;
         if ((result->action_stdout != NULL)
-            && !pcmk__str_eq(cmd->action, "metadata", pcmk__str_none)) {
+            && !pcmk__str_eq(cmd->action, PCMK_ACTION_METADATA,
+                             pcmk__str_none)) {
             output_log_level = LOG_WARNING;
         }
     }
@@ -2633,7 +2652,7 @@ send_async_reply(const async_command_t *cmd, const pcmk__action_result_t *result
 
     reply = construct_async_reply(cmd, result);
     if (merged) {
-        pcmk__xe_set_bool_attr(reply, F_STONITH_MERGED, true);
+        pcmk__xe_set_bool_attr(reply, PCMK__XA_ST_OP_MERGED, true);
     }
 
     if (!stand_alone && pcmk__is_fencing_action(cmd->action)
@@ -2643,9 +2662,9 @@ send_async_reply(const async_command_t *cmd, const pcmk__action_result_t *result
          */
         crm_trace("Broadcast '%s' result for %s (target was also originator)",
                   cmd->action, cmd->target);
-        crm_xml_add(reply, F_SUBTYPE, "broadcast");
-        crm_xml_add(reply, F_STONITH_OPERATION, T_STONITH_NOTIFY);
-        send_cluster_message(NULL, crm_msg_stonith_ng, reply, FALSE);
+        crm_xml_add(reply, PCMK__XA_SUBT, PCMK__VALUE_BROADCAST);
+        crm_xml_add(reply, PCMK__XA_ST_OP, STONITH_OP_NOTIFY);
+        pcmk__cluster_send_message(NULL, crm_msg_stonith_ng, reply);
     } else {
         // Reply only to the originator
         stonith_send_reply(reply, cmd->options, cmd->origin, client);
@@ -2656,18 +2675,19 @@ send_async_reply(const async_command_t *cmd, const pcmk__action_result_t *result
 
     if (stand_alone) {
         /* Do notification with a clean data object */
-        xmlNode *notify_data = create_xml_node(NULL, T_STONITH_NOTIFY_FENCE);
+        xmlNode *notify_data = pcmk__xe_create(NULL, PCMK__XE_ST_NOTIFY_FENCE);
 
         stonith__xe_set_result(notify_data, result);
-        crm_xml_add(notify_data, F_STONITH_TARGET, cmd->target);
-        crm_xml_add(notify_data, F_STONITH_OPERATION, cmd->op);
-        crm_xml_add(notify_data, F_STONITH_DELEGATE, "localhost");
-        crm_xml_add(notify_data, F_STONITH_DEVICE, cmd->device);
-        crm_xml_add(notify_data, F_STONITH_REMOTE_OP_ID, cmd->remote_op_id);
-        crm_xml_add(notify_data, F_STONITH_ORIGIN, cmd->client);
+        crm_xml_add(notify_data, PCMK__XA_ST_TARGET, cmd->target);
+        crm_xml_add(notify_data, PCMK__XA_ST_OP, cmd->op);
+        crm_xml_add(notify_data, PCMK__XA_ST_DELEGATE, "localhost");
+        crm_xml_add(notify_data, PCMK__XA_ST_DEVICE_ID, cmd->device);
+        crm_xml_add(notify_data, PCMK__XA_ST_REMOTE_OP, cmd->remote_op_id);
+        crm_xml_add(notify_data, PCMK__XA_ST_ORIGIN, cmd->client);
 
-        fenced_send_notification(T_STONITH_NOTIFY_FENCE, result, notify_data);
-        fenced_send_notification(T_STONITH_NOTIFY_HISTORY, NULL, NULL);
+        fenced_send_notification(PCMK__VALUE_ST_NOTIFY_FENCE, result,
+                                 notify_data);
+        fenced_send_notification(PCMK__VALUE_ST_NOTIFY_HISTORY, NULL, NULL);
     }
 }
 
@@ -2890,7 +2910,7 @@ fence_locally(xmlNode *msg, pcmk__action_result_t *result)
 
     CRM_CHECK((msg != NULL) && (result != NULL), return);
 
-    dev = get_xpath_object("//@" F_STONITH_TARGET, msg, LOG_ERR);
+    dev = get_xpath_object("//@" PCMK__XA_ST_TARGET, msg, LOG_ERR);
 
     cmd = create_async_command(msg);
     if (cmd == NULL) {
@@ -2899,7 +2919,7 @@ fence_locally(xmlNode *msg, pcmk__action_result_t *result)
         return;
     }
 
-    device_id = crm_element_value(dev, F_STONITH_DEVICE);
+    device_id = crm_element_value(dev, PCMK__XA_ST_DEVICE_ID);
     if (device_id != NULL) {
         device = g_hash_table_lookup(device_list, device_id);
         if (device == NULL) {
@@ -2911,14 +2931,16 @@ fence_locally(xmlNode *msg, pcmk__action_result_t *result)
         schedule_stonith_command(cmd, device);
 
     } else {
-        const char *host = crm_element_value(dev, F_STONITH_TARGET);
+        const char *host = crm_element_value(dev, PCMK__XA_ST_TARGET);
 
         if (pcmk_is_set(cmd->options, st_opt_cs_nodeid)) {
             int nodeid = 0;
             crm_node_t *node = NULL;
 
             pcmk__scan_min_int(host, &nodeid, 0);
-            node = pcmk__search_known_node_cache(nodeid, NULL, CRM_GET_PEER_ANY);
+            node = pcmk__search_node_caches(nodeid, NULL,
+                                            pcmk__node_search_any
+                                            |pcmk__node_search_cluster_cib);
             if (node != NULL) {
                 host = node->uname;
             }
@@ -2953,10 +2975,10 @@ fenced_construct_reply(const xmlNode *request, xmlNode *data,
 {
     xmlNode *reply = NULL;
 
-    reply = create_xml_node(NULL, T_STONITH_REPLY);
+    reply = pcmk__xe_create(NULL, PCMK__XE_ST_REPLY);
 
-    crm_xml_add(reply, "st_origin", __func__);
-    crm_xml_add(reply, F_TYPE, T_STONITH_NG);
+    crm_xml_add(reply, PCMK__XA_ST_ORIGIN, __func__);
+    crm_xml_add(reply, PCMK__XA_T, PCMK__VALUE_STONITH_NG);
     stonith__xe_set_result(reply, result);
 
     if (request == NULL) {
@@ -2976,12 +2998,12 @@ fenced_construct_reply(const xmlNode *request, xmlNode *data,
 
         // Attributes to copy from request to reply
         const char *names[] = {
-            F_STONITH_OPERATION,
-            F_STONITH_CALLID,
-            F_STONITH_CLIENTID,
-            F_STONITH_CLIENTNAME,
-            F_STONITH_REMOTE_OP_ID,
-            F_STONITH_CALLOPTS
+            PCMK__XA_ST_OP,
+            PCMK__XA_ST_CALLID,
+            PCMK__XA_ST_CLIENTID,
+            PCMK__XA_ST_CLIENTNAME,
+            PCMK__XA_ST_REMOTE_OP,
+            PCMK__XA_ST_CALLOPT,
         };
 
         for (int lpc = 0; lpc < PCMK__NELEM(names); lpc++) {
@@ -2990,7 +3012,9 @@ fenced_construct_reply(const xmlNode *request, xmlNode *data,
             crm_xml_add(reply, name, value);
         }
         if (data != NULL) {
-            add_message_xml(reply, F_STONITH_CALLDATA, data);
+            xmlNode *wrapper = pcmk__xe_create(reply, PCMK__XE_ST_CALLDATA);
+
+            pcmk__xml_copy(wrapper, data);
         }
     }
     return reply;
@@ -3007,20 +3031,20 @@ static xmlNode *
 construct_async_reply(const async_command_t *cmd,
                       const pcmk__action_result_t *result)
 {
-    xmlNode *reply = create_xml_node(NULL, T_STONITH_REPLY);
-
-    crm_xml_add(reply, "st_origin", __func__);
-    crm_xml_add(reply, F_TYPE, T_STONITH_NG);
-    crm_xml_add(reply, F_STONITH_OPERATION, cmd->op);
-    crm_xml_add(reply, F_STONITH_DEVICE, cmd->device);
-    crm_xml_add(reply, F_STONITH_REMOTE_OP_ID, cmd->remote_op_id);
-    crm_xml_add(reply, F_STONITH_CLIENTID, cmd->client);
-    crm_xml_add(reply, F_STONITH_CLIENTNAME, cmd->client_name);
-    crm_xml_add(reply, F_STONITH_TARGET, cmd->target);
-    crm_xml_add(reply, F_STONITH_ACTION, cmd->op);
-    crm_xml_add(reply, F_STONITH_ORIGIN, cmd->origin);
-    crm_xml_add_int(reply, F_STONITH_CALLID, cmd->id);
-    crm_xml_add_int(reply, F_STONITH_CALLOPTS, cmd->options);
+    xmlNode *reply = pcmk__xe_create(NULL, PCMK__XE_ST_REPLY);
+
+    crm_xml_add(reply, PCMK__XA_ST_ORIGIN, __func__);
+    crm_xml_add(reply, PCMK__XA_T, PCMK__VALUE_STONITH_NG);
+    crm_xml_add(reply, PCMK__XA_ST_OP, cmd->op);
+    crm_xml_add(reply, PCMK__XA_ST_DEVICE_ID, cmd->device);
+    crm_xml_add(reply, PCMK__XA_ST_REMOTE_OP, cmd->remote_op_id);
+    crm_xml_add(reply, PCMK__XA_ST_CLIENTID, cmd->client);
+    crm_xml_add(reply, PCMK__XA_ST_CLIENTNAME, cmd->client_name);
+    crm_xml_add(reply, PCMK__XA_ST_TARGET, cmd->target);
+    crm_xml_add(reply, PCMK__XA_ST_DEVICE_ACTION, cmd->op);
+    crm_xml_add(reply, PCMK__XA_ST_ORIGIN, cmd->origin);
+    crm_xml_add_int(reply, PCMK__XA_ST_CALLID, cmd->id);
+    crm_xml_add_int(reply, PCMK__XA_ST_CALLOPT, cmd->options);
 
     stonith__xe_set_result(reply, result);
     return reply;
@@ -3081,7 +3105,8 @@ check_alternate_host(const char *target)
 static void 
 remove_relay_op(xmlNode * request)
 {
-    xmlNode *dev = get_xpath_object("//@" F_STONITH_ACTION, request, LOG_TRACE);
+    xmlNode *dev = get_xpath_object("//@" PCMK__XE_ST_DEVICE_ACTION, request,
+                                    LOG_TRACE);
     const char *relay_op_id = NULL; 
     const char *op_id = NULL;
     const char *client_name = NULL;
@@ -3089,12 +3114,12 @@ remove_relay_op(xmlNode * request)
     remote_fencing_op_t *relay_op = NULL; 
 
     if (dev) { 
-        target = crm_element_value(dev, F_STONITH_TARGET); 
+        target = crm_element_value(dev, PCMK__XA_ST_TARGET);
     }
 
-    relay_op_id = crm_element_value(request, F_STONITH_REMOTE_OP_ID_RELAY);
-    op_id = crm_element_value(request, F_STONITH_REMOTE_OP_ID);
-    client_name = crm_element_value(request, F_STONITH_CLIENTNAME);
+    relay_op_id = crm_element_value(request, PCMK__XA_ST_REMOTE_OP_RELAY);
+    op_id = crm_element_value(request, PCMK__XA_ST_REMOTE_OP);
+    client_name = crm_element_value(request, PCMK__XA_ST_CLIENTNAME);
 
     /* Delete RELAY operation. */
     if (relay_op_id && target && pcmk__str_eq(target, stonith_our_uname, pcmk__str_casei)) {
@@ -3162,11 +3187,11 @@ is_privileged(const pcmk__client_t *c, const char *op)
 static xmlNode *
 handle_register_request(pcmk__request_t *request)
 {
-    xmlNode *reply = create_xml_node(NULL, "reply");
+    xmlNode *reply = pcmk__xe_create(NULL, "reply");
 
     CRM_ASSERT(request->ipc_client != NULL);
-    crm_xml_add(reply, F_STONITH_OPERATION, CRM_OP_REGISTER);
-    crm_xml_add(reply, F_STONITH_CLIENTID, request->ipc_client->id);
+    crm_xml_add(reply, PCMK__XA_ST_OP, CRM_OP_REGISTER);
+    crm_xml_add(reply, PCMK__XA_ST_CLIENTID, request->ipc_client->id);
     pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
     pcmk__set_request_flags(request, pcmk__request_reuse_options);
     return reply;
@@ -3187,11 +3212,12 @@ handle_agent_request(pcmk__request_t *request)
 static xmlNode *
 handle_update_timeout_request(pcmk__request_t *request)
 {
-    const char *call_id = crm_element_value(request->xml, F_STONITH_CALLID);
-    const char *client_id = crm_element_value(request->xml, F_STONITH_CLIENTID);
+    const char *call_id = crm_element_value(request->xml, PCMK__XA_ST_CALLID);
+    const char *client_id = crm_element_value(request->xml,
+                                              PCMK__XA_ST_CLIENTID);
     int op_timeout = 0;
 
-    crm_element_value_int(request->xml, F_STONITH_TIMEOUT, &op_timeout);
+    crm_element_value_int(request->xml, PCMK__XA_ST_TIMEOUT, &op_timeout);
     do_stonith_async_timeout_update(client_id, call_id, op_timeout);
     pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
     return NULL;
@@ -3205,7 +3231,8 @@ handle_query_request(pcmk__request_t *request)
     xmlNode *dev = NULL;
     const char *action = NULL;
     const char *target = NULL;
-    const char *client_id = crm_element_value(request->xml, F_STONITH_CLIENTID);
+    const char *client_id = crm_element_value(request->xml,
+                                              PCMK__XA_ST_CLIENTID);
     struct st_query_data *query = NULL;
 
     if (request->peer != NULL) {
@@ -3218,51 +3245,51 @@ handle_query_request(pcmk__request_t *request)
 
     pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
 
-    dev = get_xpath_object("//@" F_STONITH_ACTION, request->xml, LOG_NEVER);
+    dev = get_xpath_object("//@" PCMK__XE_ST_DEVICE_ACTION, request->xml,
+                           LOG_NEVER);
     if (dev != NULL) {
-        const char *device = crm_element_value(dev, F_STONITH_DEVICE);
+        const char *device = crm_element_value(dev, PCMK__XA_ST_DEVICE_ID);
 
         if (pcmk__str_eq(device, "manual_ack", pcmk__str_casei)) {
             return NULL; // No query or reply necessary
         }
-        target = crm_element_value(dev, F_STONITH_TARGET);
-        action = crm_element_value(dev, F_STONITH_ACTION);
+        target = crm_element_value(dev, PCMK__XA_ST_TARGET);
+        action = crm_element_value(dev, PCMK__XA_ST_DEVICE_ACTION);
     }
 
     crm_log_xml_trace(request->xml, "Query");
 
-    query = calloc(1, sizeof(struct st_query_data));
-    CRM_ASSERT(query != NULL);
+    query = pcmk__assert_alloc(1, sizeof(struct st_query_data));
 
     query->reply = fenced_construct_reply(request->xml, NULL, &request->result);
-    pcmk__str_update(&query->remote_peer, request->peer);
-    pcmk__str_update(&query->client_id, client_id);
-    pcmk__str_update(&query->target, target);
-    pcmk__str_update(&query->action, action);
+    query->remote_peer = pcmk__str_copy(request->peer);
+    query->client_id = pcmk__str_copy(client_id);
+    query->target = pcmk__str_copy(target);
+    query->action = pcmk__str_copy(action);
     query->call_options = request->call_options;
 
-    crm_element_value_int(request->xml, F_STONITH_TIMEOUT, &timeout);
+    crm_element_value_int(request->xml, PCMK__XA_ST_TIMEOUT, &timeout);
     get_capable_devices(target, action, timeout,
                         pcmk_is_set(query->call_options, st_opt_allow_suicide),
                         query, stonith_query_capable_device_cb, st_device_supports_none);
     return NULL;
 }
 
-// T_STONITH_NOTIFY
+// STONITH_OP_NOTIFY
 static xmlNode *
 handle_notify_request(pcmk__request_t *request)
 {
     const char *flag_name = NULL;
 
     CRM_ASSERT(request->ipc_client != NULL);
-    flag_name = crm_element_value(request->xml, F_STONITH_NOTIFY_ACTIVATE);
+    flag_name = crm_element_value(request->xml, PCMK__XA_ST_NOTIFY_ACTIVATE);
     if (flag_name != NULL) {
         crm_debug("Enabling %s callbacks for client %s",
                   flag_name, pcmk__request_origin(request));
         pcmk__set_client_flags(request->ipc_client, get_stonith_flag(flag_name));
     }
 
-    flag_name = crm_element_value(request->xml, F_STONITH_NOTIFY_DEACTIVATE);
+    flag_name = crm_element_value(request->xml, PCMK__XA_ST_NOTIFY_DEACTIVATE);
     if (flag_name != NULL) {
         crm_debug("Disabling %s callbacks for client %s",
                   flag_name, pcmk__request_origin(request));
@@ -3273,22 +3300,23 @@ handle_notify_request(pcmk__request_t *request)
     pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
     pcmk__set_request_flags(request, pcmk__request_reuse_options);
 
-    return pcmk__ipc_create_ack(request->ipc_flags, "ack", NULL, CRM_EX_OK);
+    return pcmk__ipc_create_ack(request->ipc_flags, PCMK__XE_ACK, NULL,
+                                CRM_EX_OK);
 }
 
 // STONITH_OP_RELAY
 static xmlNode *
 handle_relay_request(pcmk__request_t *request)
 {
-    xmlNode *dev = get_xpath_object("//@" F_STONITH_TARGET, request->xml,
+    xmlNode *dev = get_xpath_object("//@" PCMK__XA_ST_TARGET, request->xml,
                                     LOG_TRACE);
 
     crm_notice("Received forwarded fencing request from "
                "%s %s to fence (%s) peer %s",
                pcmk__request_origin_type(request),
                pcmk__request_origin(request),
-               crm_element_value(dev, F_STONITH_ACTION),
-               crm_element_value(dev, F_STONITH_TARGET));
+               crm_element_value(dev, PCMK__XA_ST_DEVICE_ACTION),
+               crm_element_value(dev, PCMK__XA_ST_TARGET));
 
     if (initiate_remote_stonith_op(NULL, request->xml, FALSE) == NULL) {
         fenced_set_protocol_error(&request->result);
@@ -3324,11 +3352,11 @@ handle_fence_request(pcmk__request_t *request)
 
     } else {
         const char *alternate_host = NULL;
-        xmlNode *dev = get_xpath_object("//@" F_STONITH_TARGET, request->xml,
+        xmlNode *dev = get_xpath_object("//@" PCMK__XA_ST_TARGET, request->xml,
                                         LOG_TRACE);
-        const char *target = crm_element_value(dev, F_STONITH_TARGET);
-        const char *action = crm_element_value(dev, F_STONITH_ACTION);
-        const char *device = crm_element_value(dev, F_STONITH_DEVICE);
+        const char *target = crm_element_value(dev, PCMK__XA_ST_TARGET);
+        const char *action = crm_element_value(dev, PCMK__XA_ST_DEVICE_ACTION);
+        const char *device = crm_element_value(dev, PCMK__XA_ST_DEVICE_ID);
 
         if (request->ipc_client != NULL) {
             int tolerance = 0;
@@ -3336,7 +3364,7 @@ handle_fence_request(pcmk__request_t *request)
             crm_notice("Client %s wants to fence (%s) %s using %s",
                        pcmk__request_origin(request), action,
                        target, (device? device : "any device"));
-            crm_element_value_int(dev, F_STONITH_TOLERANCE, &tolerance);
+            crm_element_value_int(dev, PCMK__XA_ST_TOLERANCE, &tolerance);
             if (stonith_check_fence_tolerance(tolerance, target, action)) {
                 pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE,
                                  NULL);
@@ -3354,9 +3382,12 @@ handle_fence_request(pcmk__request_t *request)
         if (alternate_host != NULL) {
             const char *client_id = NULL;
             remote_fencing_op_t *op = NULL;
+            crm_node_t *node = pcmk__get_node(0, alternate_host, NULL,
+                                              pcmk__node_search_cluster_member);
 
             if (request->ipc_client->id == 0) {
-                client_id = crm_element_value(request->xml, F_STONITH_CLIENTID);
+                client_id = crm_element_value(request->xml,
+                                              PCMK__XA_ST_CLIENTID);
             } else {
                 client_id = request->ipc_client->id;
             }
@@ -3367,12 +3398,11 @@ handle_fence_request(pcmk__request_t *request)
              */
             op = create_remote_stonith_op(client_id, request->xml, FALSE);
 
-            crm_xml_add(request->xml, F_STONITH_OPERATION, STONITH_OP_RELAY);
-            crm_xml_add(request->xml, F_STONITH_CLIENTID,
+            crm_xml_add(request->xml, PCMK__XA_ST_OP, STONITH_OP_RELAY);
+            crm_xml_add(request->xml, PCMK__XA_ST_CLIENTID,
                         request->ipc_client->id);
-            crm_xml_add(request->xml, F_STONITH_REMOTE_OP_ID, op->id);
-            send_cluster_message(crm_get_peer(0, alternate_host),
-                                 crm_msg_stonith_ng, request->xml, FALSE);
+            crm_xml_add(request->xml, PCMK__XA_ST_REMOTE_OP, op->id);
+            pcmk__cluster_send_message(node, crm_msg_stonith_ng, request->xml);
             pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_PENDING,
                              NULL);
 
@@ -3416,8 +3446,8 @@ handle_history_request(pcmk__request_t *request)
 static xmlNode *
 handle_device_add_request(pcmk__request_t *request)
 {
-    const char *op = crm_element_value(request->xml, F_STONITH_OPERATION);
-    xmlNode *dev = get_xpath_object("//" F_STONITH_DEVICE, request->xml,
+    const char *op = crm_element_value(request->xml, PCMK__XA_ST_OP);
+    xmlNode *dev = get_xpath_object("//" PCMK__XE_ST_DEVICE_ID, request->xml,
                                     LOG_ERR);
 
     if (is_privileged(request->ipc_client, op)) {
@@ -3432,8 +3462,8 @@ handle_device_add_request(pcmk__request_t *request)
                          PCMK_EXEC_INVALID,
                          "Unprivileged users must register device via CIB");
     }
-    fenced_send_device_notification(op, &request->result,
-                                    (dev == NULL)? NULL : ID(dev));
+    fenced_send_config_notification(op, &request->result,
+                                    (dev == NULL)? NULL : pcmk__xe_id(dev));
     return fenced_construct_reply(request->xml, NULL, &request->result);
 }
 
@@ -3441,10 +3471,10 @@ handle_device_add_request(pcmk__request_t *request)
 static xmlNode *
 handle_device_delete_request(pcmk__request_t *request)
 {
-    xmlNode *dev = get_xpath_object("//" F_STONITH_DEVICE, request->xml,
+    xmlNode *dev = get_xpath_object("//" PCMK__XE_ST_DEVICE_ID, request->xml,
                                     LOG_ERR);
-    const char *device_id = crm_element_value(dev, XML_ATTR_ID);
-    const char *op = crm_element_value(request->xml, F_STONITH_OPERATION);
+    const char *device_id = crm_element_value(dev, PCMK_XA_ID);
+    const char *op = crm_element_value(request->xml, PCMK__XA_ST_OP);
 
     if (is_privileged(request->ipc_client, op)) {
         stonith_device_remove(device_id, false);
@@ -3454,7 +3484,7 @@ handle_device_delete_request(pcmk__request_t *request)
                          PCMK_EXEC_INVALID,
                          "Unprivileged users must delete device via CIB");
     }
-    fenced_send_device_notification(op, &request->result, device_id);
+    fenced_send_config_notification(op, &request->result, device_id);
     return fenced_construct_reply(request->xml, NULL, &request->result);
 }
 
@@ -3463,7 +3493,7 @@ static xmlNode *
 handle_level_add_request(pcmk__request_t *request)
 {
     char *desc = NULL;
-    const char *op = crm_element_value(request->xml, F_STONITH_OPERATION);
+    const char *op = crm_element_value(request->xml, PCMK__XA_ST_OP);
 
     if (is_privileged(request->ipc_client, op)) {
         fenced_register_level(request->xml, &desc, &request->result);
@@ -3473,7 +3503,7 @@ handle_level_add_request(pcmk__request_t *request)
                          PCMK_EXEC_INVALID,
                          "Unprivileged users must add level via CIB");
     }
-    fenced_send_level_notification(op, &request->result, desc);
+    fenced_send_config_notification(op, &request->result, desc);
     free(desc);
     return fenced_construct_reply(request->xml, NULL, &request->result);
 }
@@ -3483,7 +3513,7 @@ static xmlNode *
 handle_level_delete_request(pcmk__request_t *request)
 {
     char *desc = NULL;
-    const char *op = crm_element_value(request->xml, F_STONITH_OPERATION);
+    const char *op = crm_element_value(request->xml, PCMK__XA_ST_OP);
 
     if (is_privileged(request->ipc_client, op)) {
         fenced_unregister_level(request->xml, &desc, &request->result);
@@ -3493,7 +3523,7 @@ handle_level_delete_request(pcmk__request_t *request)
                          PCMK_EXEC_INVALID,
                          "Unprivileged users must delete level via CIB");
     }
-    fenced_send_level_notification(op, &request->result, desc);
+    fenced_send_config_notification(op, &request->result, desc);
     free(desc);
     return fenced_construct_reply(request->xml, NULL, &request->result);
 }
@@ -3505,9 +3535,9 @@ handle_cache_request(pcmk__request_t *request)
     int node_id = 0;
     const char *name = NULL;
 
-    crm_element_value_int(request->xml, XML_ATTR_ID, &node_id);
-    name = crm_element_value(request->xml, XML_ATTR_UNAME);
-    reap_crm_member(node_id, name);
+    crm_element_value_int(request->xml, PCMK_XA_ID, &node_id);
+    name = crm_element_value(request->xml, PCMK_XA_UNAME);
+    pcmk__cluster_forget_cluster_node(node_id, name);
     pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
     return NULL;
 }
@@ -3531,7 +3561,7 @@ fenced_register_handlers(void)
         { STONITH_OP_EXEC, handle_agent_request },
         { STONITH_OP_TIMEOUT_UPDATE, handle_update_timeout_request },
         { STONITH_OP_QUERY, handle_query_request },
-        { T_STONITH_NOTIFY, handle_notify_request },
+        { STONITH_OP_NOTIFY, handle_notify_request },
         { STONITH_OP_RELAY, handle_relay_request },
         { STONITH_OP_FENCE, handle_fence_request },
         { STONITH_OP_FENCE_HISTORY, handle_history_request },
@@ -3596,12 +3626,15 @@ static void
 handle_reply(pcmk__client_t *client, xmlNode *request, const char *remote_peer)
 {
     // Copy, because request might be freed before we want to log this
-    char *op = crm_element_value_copy(request, F_STONITH_OPERATION);
+    char *op = crm_element_value_copy(request, PCMK__XA_ST_OP);
 
     if (pcmk__str_eq(op, STONITH_OP_QUERY, pcmk__str_none)) {
         process_remote_stonith_query(request);
-    } else if (pcmk__str_any_of(op, T_STONITH_NOTIFY, STONITH_OP_FENCE, NULL)) {
+
+    } else if (pcmk__str_any_of(op, STONITH_OP_NOTIFY, STONITH_OP_FENCE,
+                                NULL)) {
         fenced_process_fencing_reply(request);
+
     } else {
         crm_err("Ignoring unknown %s reply from %s %s",
                 pcmk__s(op, "untyped"), ((client == NULL)? "peer" : "client"),
@@ -3635,13 +3668,13 @@ stonith_command(pcmk__client_t *client, uint32_t id, uint32_t flags,
 
     CRM_CHECK(message != NULL, return);
 
-    if (get_xpath_object("//" T_STONITH_REPLY, message, LOG_NEVER) != NULL) {
+    if (get_xpath_object("//" PCMK__XE_ST_REPLY, message, LOG_NEVER) != NULL) {
         is_reply = true;
     }
-    crm_element_value_int(message, F_STONITH_CALLOPTS, &call_options);
+    crm_element_value_int(message, PCMK__XA_ST_CALLOPT, &call_options);
     crm_debug("Processing %ssynchronous %s %s %u from %s %s",
               pcmk_is_set(call_options, st_opt_sync_call)? "" : "a",
-              crm_element_value(message, F_STONITH_OPERATION),
+              crm_element_value(message, PCMK__XA_ST_OP),
               (is_reply? "reply" : "request"), id,
               ((client == NULL)? "peer" : "client"),
               ((client == NULL)? remote_peer : pcmk__client_name(client)));
@@ -3663,7 +3696,7 @@ stonith_command(pcmk__client_t *client, uint32_t id, uint32_t flags,
             .result         = PCMK__UNKNOWN_RESULT,
         };
 
-        request.op = crm_element_value_copy(request.xml, F_STONITH_OPERATION);
+        request.op = crm_element_value_copy(request.xml, PCMK__XA_ST_OP);
         CRM_CHECK(request.op != NULL, return);
 
         if (pcmk_is_set(request.call_options, st_opt_sync_call)) {
diff --git a/daemons/fenced/fenced_history.c b/daemons/fenced/fenced_history.c
index a766477..5fcdb1f 100644
--- a/daemons/fenced/fenced_history.c
+++ b/daemons/fenced/fenced_history.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2022 the Pacemaker project contributors
+ * Copyright 2009-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,6 @@
 #include <stdlib.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_internal.h>
 #include <crm/cluster/internal.h>
@@ -42,23 +41,22 @@ stonith_send_broadcast_history(xmlNode *history,
                                int callopts,
                                const char *target)
 {
-    xmlNode *bcast = create_xml_node(NULL, "stonith_command");
-    xmlNode *data = create_xml_node(NULL, __func__);
-
-    if (target) {
-        crm_xml_add(data, F_STONITH_TARGET, target);
-    }
-    crm_xml_add(bcast, F_TYPE, T_STONITH_NG);
-    crm_xml_add(bcast, F_SUBTYPE, "broadcast");
-    crm_xml_add(bcast, F_STONITH_OPERATION, STONITH_OP_FENCE_HISTORY);
-    crm_xml_add_int(bcast, F_STONITH_CALLOPTS, callopts);
-    if (history) {
-        add_node_copy(data, history);
+    xmlNode *bcast = pcmk__xe_create(NULL, PCMK__XE_STONITH_COMMAND);
+    xmlNode *wrapper = pcmk__xe_create(bcast, PCMK__XE_ST_CALLDATA);
+    xmlNode *call_data = pcmk__xe_create(wrapper, __func__);
+
+    crm_xml_add(bcast, PCMK__XA_T, PCMK__VALUE_STONITH_NG);
+    crm_xml_add(bcast, PCMK__XA_SUBT, PCMK__VALUE_BROADCAST);
+    crm_xml_add(bcast, PCMK__XA_ST_OP, STONITH_OP_FENCE_HISTORY);
+    crm_xml_add_int(bcast, PCMK__XA_ST_CALLOPT, callopts);
+
+    pcmk__xml_copy(call_data, history);
+    if (target != NULL) {
+        crm_xml_add(call_data, PCMK__XA_ST_TARGET, target);
     }
-    add_message_xml(bcast, F_STONITH_CALLDATA, data);
-    send_cluster_message(NULL, crm_msg_stonith_ng, bcast, FALSE);
 
-    free_xml(data);
+    pcmk__cluster_send_message(NULL, crm_msg_stonith_ng, bcast);
+
     free_xml(bcast);
 }
 
@@ -100,7 +98,7 @@ stonith_fence_history_cleanup(const char *target,
         g_hash_table_foreach_remove(stonith_remote_op_list,
                              stonith_remove_history_entry,
                              (gpointer) target);
-        fenced_send_notification(T_STONITH_NOTIFY_HISTORY, NULL, NULL);
+        fenced_send_notification(PCMK__VALUE_ST_NOTIFY_HISTORY, NULL, NULL);
     }
 }
 
@@ -133,34 +131,68 @@ stonith_fence_history_cleanup(const char *target,
  * situations where it would be handy to have it probably.
  */
 
-
-static int
-op_time_sort(const void *a_voidp, const void *b_voidp)
+/*!
+ * \internal
+ * \brief Compare two remote fencing operations by status and completion time
+ *
+ * A pending operation is ordered before a completed operation. If both
+ * operations have completed, then the more recently completed operation is
+ * ordered first. Two pending operations are considered equal.
+ *
+ * \param[in] a  First \c remote_fencing_op_t to compare
+ * \param[in] b  Second \c remote_fencing_op_t to compare
+ *
+ * \return Standard comparison result (a negative integer if \p a is lesser,
+ *         0 if the values are equal, and a positive integer if \p a is greater)
+ */
+static gint
+cmp_op_by_completion(gconstpointer a, gconstpointer b)
 {
-    const remote_fencing_op_t **a = (const remote_fencing_op_t **) a_voidp;
-    const remote_fencing_op_t **b = (const remote_fencing_op_t **) b_voidp;
-    gboolean a_pending = ((*a)->state != st_failed) && ((*a)->state != st_done);
-    gboolean b_pending = ((*b)->state != st_failed) && ((*b)->state != st_done);
+    const remote_fencing_op_t *op1 = a;
+    const remote_fencing_op_t *op2 = b;
+    bool op1_pending = stonith__op_state_pending(op1->state);
+    bool op2_pending = stonith__op_state_pending(op2->state);
 
-    if (a_pending && b_pending) {
+    if (op1_pending && op2_pending) {
         return 0;
-    } else if (a_pending) {
+    }
+    if (op1_pending) {
         return -1;
-    } else if (b_pending) {
+    }
+    if (op2_pending) {
         return 1;
-    } else if ((*b)->completed == (*a)->completed) {
-        if ((*b)->completed_nsec > (*a)->completed_nsec) {
-            return 1;
-        } else if ((*b)->completed_nsec == (*a)->completed_nsec) {
-            return 0;
-        }
-    } else if ((*b)->completed > (*a)->completed) {
+    }
+    if (op1->completed > op2->completed) {
+        return -1;
+    }
+    if (op1->completed < op2->completed) {
         return 1;
     }
-
-    return -1;
+    if (op1->completed_nsec > op2->completed_nsec) {
+        return -1;
+    }
+    if (op1->completed_nsec < op2->completed_nsec) {
+        return 1;
+    }
+    return 0;
 }
 
+/*!
+ * \internal
+ * \brief Remove a completed operation from \c stonith_remote_op_list
+ *
+ * \param[in] data       \c remote_fencing_op_t to remove
+ * \param[in] user_data  Ignored
+ */
+static void
+remove_completed_remote_op(gpointer data, gpointer user_data)
+{
+    const remote_fencing_op_t *op = data;
+
+    if (!stonith__op_state_pending(op->state)) {
+        g_hash_table_remove(stonith_remote_op_list, op->id);
+    }
+}
 
 /*!
  * \internal
@@ -170,43 +202,24 @@ op_time_sort(const void *a_voidp, const void *b_voidp)
 void
 stonith_fence_history_trim(void)
 {
-    guint num_ops;
-
-    if (!stonith_remote_op_list) {
+    if (stonith_remote_op_list == NULL) {
         return;
     }
-    num_ops = g_hash_table_size(stonith_remote_op_list);
-    if (num_ops > MAX_STONITH_HISTORY) {
-        remote_fencing_op_t *ops[num_ops];
-        remote_fencing_op_t *op = NULL;
-        GHashTableIter iter;
-        int i;
 
-        crm_trace("Fencing History growing beyond limit of %d so purge "
-                  "half of failed/successful attempts", MAX_STONITH_HISTORY);
+    if (g_hash_table_size(stonith_remote_op_list) > MAX_STONITH_HISTORY) {
+        GList *ops = g_hash_table_get_values(stonith_remote_op_list);
 
-        /* write all ops into an array */
-        i = 0;
-        g_hash_table_iter_init(&iter, stonith_remote_op_list);
-        while (g_hash_table_iter_next(&iter, NULL, (void **)&op)) {
-            ops[i++] = op;
-        }
-        /* run quicksort over the array so that we get pending ops
-         * first and then sorted most recent to oldest
-         */
-        qsort(ops, num_ops, sizeof(remote_fencing_op_t *), op_time_sort);
-        /* purgest oldest half of the history entries */
-        for (i = MAX_STONITH_HISTORY / 2; i < num_ops; i++) {
-            /* keep pending ops even if they shouldn't fill more than
-             * half of our buffer
-             */
-            if ((ops[i]->state == st_failed) || (ops[i]->state == st_done)) {
-                g_hash_table_remove(stonith_remote_op_list, ops[i]->id);
-            }
-        }
-        /* we've just purged valid data from the list so there is no need
-         * to create a notification - if displayed it can stay
-         */
+        crm_trace("More than %d entries in fencing history, purging oldest "
+                  "completed operations", MAX_STONITH_HISTORY);
+
+        ops = g_list_sort(ops, cmp_op_by_completion);
+
+        // Always keep pending ops regardless of number of entries
+        g_list_foreach(g_list_nth(ops, MAX_STONITH_HISTORY / 2),
+                       remove_completed_remote_op, NULL);
+
+        // No need for a notification after purging old data
+        g_list_free(ops);
     }
 }
 
@@ -228,10 +241,11 @@ stonith_xml_history_to_list(const xmlNode *history)
 
     CRM_LOG_ASSERT(rv != NULL);
 
-    for (xml_op = pcmk__xml_first_child(history); xml_op != NULL;
-         xml_op = pcmk__xml_next(xml_op)) {
+    for (xml_op = pcmk__xe_first_child(history, NULL, NULL, NULL);
+         xml_op != NULL; xml_op = pcmk__xe_next(xml_op)) {
+
         remote_fencing_op_t *op = NULL;
-        char *id = crm_element_value_copy(xml_op, F_STONITH_REMOTE_OP_ID);
+        char *id = crm_element_value_copy(xml_op, PCMK__XA_ST_REMOTE_OP);
         int state;
         int exit_status = CRM_EX_OK;
         int execution_status = PCMK_EXEC_DONE;
@@ -245,35 +259,37 @@ stonith_xml_history_to_list(const xmlNode *history)
 
         crm_trace("Attaching op %s to hashtable", id);
 
-        op = calloc(1, sizeof(remote_fencing_op_t));
+        op = pcmk__assert_alloc(1, sizeof(remote_fencing_op_t));
 
         op->id = id;
-        op->target = crm_element_value_copy(xml_op, F_STONITH_TARGET);
-        op->action = crm_element_value_copy(xml_op, F_STONITH_ACTION);
-        op->originator = crm_element_value_copy(xml_op, F_STONITH_ORIGIN);
-        op->delegate = crm_element_value_copy(xml_op, F_STONITH_DELEGATE);
-        op->client_name = crm_element_value_copy(xml_op, F_STONITH_CLIENTNAME);
-        crm_element_value_ll(xml_op, F_STONITH_DATE, &completed);
+        op->target = crm_element_value_copy(xml_op, PCMK__XA_ST_TARGET);
+        op->action = crm_element_value_copy(xml_op, PCMK__XA_ST_DEVICE_ACTION);
+        op->originator = crm_element_value_copy(xml_op, PCMK__XA_ST_ORIGIN);
+        op->delegate = crm_element_value_copy(xml_op, PCMK__XA_ST_DELEGATE);
+        op->client_name = crm_element_value_copy(xml_op,
+                                                 PCMK__XA_ST_CLIENTNAME);
+        crm_element_value_ll(xml_op, PCMK__XA_ST_DATE, &completed);
         op->completed = (time_t) completed;
-        crm_element_value_ll(xml_op, F_STONITH_DATE_NSEC, &completed_nsec);
+        crm_element_value_ll(xml_op, PCMK__XA_ST_DATE_NSEC, &completed_nsec);
         op->completed_nsec = completed_nsec;
-        crm_element_value_int(xml_op, F_STONITH_STATE, &state);
+        crm_element_value_int(xml_op, PCMK__XA_ST_STATE, &state);
         op->state = (enum op_state) state;
 
         /* @COMPAT We can't use stonith__xe_get_result() here because
          * fencers <2.1.3 didn't include results, leading it to assume an error
          * status. Instead, set an unknown status in that case.
          */
-        if ((crm_element_value_int(xml_op, XML_LRM_ATTR_RC, &exit_status) < 0)
-            || (crm_element_value_int(xml_op, XML_LRM_ATTR_OPSTATUS,
+        if ((crm_element_value_int(xml_op, PCMK__XA_RC_CODE, &exit_status) < 0)
+            || (crm_element_value_int(xml_op, PCMK__XA_OP_STATUS,
                                       &execution_status) < 0)) {
             exit_status = CRM_EX_INDETERMINATE;
             execution_status = PCMK_EXEC_UNKNOWN;
         }
         pcmk__set_result(&op->result, exit_status, execution_status,
-                         crm_element_value(xml_op, XML_LRM_ATTR_EXIT_REASON));
+                         crm_element_value(xml_op, PCMK_XA_EXIT_REASON));
         pcmk__set_result_output(&op->result,
-                                crm_element_value_copy(xml_op, F_STONITH_OUTPUT),
+                                crm_element_value_copy(xml_op,
+                                                       PCMK__XA_ST_OUTPUT),
                                 NULL);
 
 
@@ -309,7 +325,7 @@ stonith_local_history_diff_and_merge(GHashTable *remote_history,
     if (stonith_remote_op_list) {
             char *id = NULL;
 
-            history = create_xml_node(NULL, F_STONITH_HISTORY_LIST);
+            history = pcmk__xe_create(NULL, PCMK__XE_ST_HISTORY);
 
             g_hash_table_iter_init(&iter, stonith_remote_op_list);
             while (g_hash_table_iter_next(&iter, (void **)&id, (void **)&op)) {
@@ -361,18 +377,19 @@ stonith_local_history_diff_and_merge(GHashTable *remote_history,
 
                 cnt++;
                 crm_trace("Attaching op %s", op->id);
-                entry = create_xml_node(history, STONITH_OP_EXEC);
+                entry = pcmk__xe_create(history, STONITH_OP_EXEC);
                 if (add_id) {
-                    crm_xml_add(entry, F_STONITH_REMOTE_OP_ID, op->id);
+                    crm_xml_add(entry, PCMK__XA_ST_REMOTE_OP, op->id);
                 }
-                crm_xml_add(entry, F_STONITH_TARGET, op->target);
-                crm_xml_add(entry, F_STONITH_ACTION, op->action);
-                crm_xml_add(entry, F_STONITH_ORIGIN, op->originator);
-                crm_xml_add(entry, F_STONITH_DELEGATE, op->delegate);
-                crm_xml_add(entry, F_STONITH_CLIENTNAME, op->client_name);
-                crm_xml_add_ll(entry, F_STONITH_DATE, op->completed);
-                crm_xml_add_ll(entry, F_STONITH_DATE_NSEC, op->completed_nsec);
-                crm_xml_add_int(entry, F_STONITH_STATE, op->state);
+                crm_xml_add(entry, PCMK__XA_ST_TARGET, op->target);
+                crm_xml_add(entry, PCMK__XA_ST_DEVICE_ACTION, op->action);
+                crm_xml_add(entry, PCMK__XA_ST_ORIGIN, op->originator);
+                crm_xml_add(entry, PCMK__XA_ST_DELEGATE, op->delegate);
+                crm_xml_add(entry, PCMK__XA_ST_CLIENTNAME, op->client_name);
+                crm_xml_add_ll(entry, PCMK__XA_ST_DATE, op->completed);
+                crm_xml_add_ll(entry, PCMK__XA_ST_DATE_NSEC,
+                               op->completed_nsec);
+                crm_xml_add_int(entry, PCMK__XA_ST_STATE, op->state);
                 stonith__xe_set_result(entry, &op->result);
             }
     }
@@ -418,7 +435,7 @@ stonith_local_history_diff_and_merge(GHashTable *remote_history,
 
     if (updated) {
         stonith_fence_history_trim();
-        fenced_send_notification(T_STONITH_NOTIFY_HISTORY, NULL, NULL);
+        fenced_send_notification(PCMK__VALUE_ST_NOTIFY_HISTORY, NULL, NULL);
     }
 
     if (cnt == 0) {
@@ -459,17 +476,19 @@ stonith_fence_history(xmlNode *msg, xmlNode **output,
                       const char *remote_peer, int options)
 {
     const char *target = NULL;
-    xmlNode *dev = get_xpath_object("//@" F_STONITH_TARGET, msg, LOG_NEVER);
+    xmlNode *dev = get_xpath_object("//@" PCMK__XA_ST_TARGET, msg, LOG_NEVER);
     xmlNode *out_history = NULL;
 
     if (dev) {
-        target = crm_element_value(dev, F_STONITH_TARGET);
+        target = crm_element_value(dev, PCMK__XA_ST_TARGET);
         if (target && (options & st_opt_cs_nodeid)) {
             int nodeid;
             crm_node_t *node;
 
             pcmk__scan_min_int(target, &nodeid, 0);
-            node = pcmk__search_known_node_cache(nodeid, NULL, CRM_GET_PEER_ANY);
+            node = pcmk__search_node_caches(nodeid, NULL,
+                                            pcmk__node_search_any
+                                            |pcmk__node_search_cluster_cib);
             if (node) {
                 target = node->uname;
             }
@@ -477,18 +496,20 @@ stonith_fence_history(xmlNode *msg, xmlNode **output,
     }
 
     if (options & st_opt_cleanup) {
+        const char *call_id = crm_element_value(msg, PCMK__XA_ST_CALLID);
+
         crm_trace("Cleaning up operations on %s in %p", target,
                   stonith_remote_op_list);
+        stonith_fence_history_cleanup(target, (call_id != NULL));
 
-        stonith_fence_history_cleanup(target,
-            crm_element_value(msg, F_STONITH_CALLID) != NULL);
     } else if (options & st_opt_broadcast) {
         /* there is no clear sign atm for when a history sync
            is done so send a notification for anything
            that smells like history-sync
          */
-        fenced_send_notification(T_STONITH_NOTIFY_HISTORY_SYNCED, NULL, NULL);
-        if (crm_element_value(msg, F_STONITH_CALLID)) {
+        fenced_send_notification(PCMK__VALUE_ST_NOTIFY_HISTORY_SYNCED, NULL,
+                                 NULL);
+        if (crm_element_value(msg, PCMK__XA_ST_CALLID) != NULL) {
             /* this is coming from the stonith-API
             *
             * craft a broadcast with node's history
@@ -502,8 +523,8 @@ stonith_fence_history(xmlNode *msg, xmlNode **output,
                                         NULL);
         } else if (remote_peer &&
                    !pcmk__str_eq(remote_peer, stonith_our_uname, pcmk__str_casei)) {
-            xmlNode *history = get_xpath_object("//" F_STONITH_HISTORY_LIST,
-                                                msg, LOG_NEVER);
+            xmlNode *history = get_xpath_object("//" PCMK__XE_ST_HISTORY, msg,
+                                                LOG_NEVER);
 
             /* either a broadcast created directly upon stonith-API request
             * or a diff as response to such a thing
@@ -514,7 +535,9 @@ stonith_fence_history(xmlNode *msg, xmlNode **output,
             * otherwise broadcast what we have on top
             * marking as differential and merge in afterwards
             */
-            if (!history || !pcmk__xe_attr_is_true(history, F_STONITH_DIFFERENTIAL)) {
+            if (!history
+                || !pcmk__xe_attr_is_true(history, PCMK__XA_ST_DIFFERENTIAL)) {
+
                 GHashTable *received_history = NULL;
 
                 if (history != NULL) {
@@ -524,7 +547,8 @@ stonith_fence_history(xmlNode *msg, xmlNode **output,
                     stonith_local_history_diff_and_merge(received_history, TRUE, NULL);
                 if (out_history) {
                     crm_trace("Broadcasting history-diff to peers");
-                    pcmk__xe_set_bool_attr(out_history, F_STONITH_DIFFERENTIAL, true);
+                    pcmk__xe_set_bool_attr(out_history,
+                                           PCMK__XA_ST_DIFFERENTIAL, true);
                     stonith_send_broadcast_history(out_history,
                         st_opt_broadcast | st_opt_discard_reply,
                         NULL);
diff --git a/daemons/fenced/fenced_remote.c b/daemons/fenced/fenced_remote.c
index 843b3d4..f87eeb6 100644
--- a/daemons/fenced/fenced_remote.c
+++ b/daemons/fenced/fenced_remote.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2023 the Pacemaker project contributors
+ * Copyright 2009-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -24,7 +24,6 @@
 #include <regex.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_internal.h>
 #include <crm/cluster/internal.h>
@@ -370,24 +369,25 @@ undo_op_remap(remote_fencing_op_t *op)
  * \internal
  * \brief Create notification data XML for a fencing operation result
  *
- * \param[in] op      Fencer operation that completed
+ * \param[in,out] parent  Parent XML element for newly created element
+ * \param[in]     op      Fencer operation that completed
  *
  * \return Newly created XML to add as notification data
  * \note The caller is responsible for freeing the result.
  */
 static xmlNode *
-fencing_result2xml(const remote_fencing_op_t *op)
+fencing_result2xml(xmlNode *parent, const remote_fencing_op_t *op)
 {
-    xmlNode *notify_data = create_xml_node(NULL, T_STONITH_NOTIFY_FENCE);
+    xmlNode *notify_data = pcmk__xe_create(parent, PCMK__XE_ST_NOTIFY_FENCE);
 
-    crm_xml_add_int(notify_data, "state", op->state);
-    crm_xml_add(notify_data, F_STONITH_TARGET, op->target);
-    crm_xml_add(notify_data, F_STONITH_ACTION, op->action);
-    crm_xml_add(notify_data, F_STONITH_DELEGATE, op->delegate);
-    crm_xml_add(notify_data, F_STONITH_REMOTE_OP_ID, op->id);
-    crm_xml_add(notify_data, F_STONITH_ORIGIN, op->originator);
-    crm_xml_add(notify_data, F_STONITH_CLIENTID, op->client_id);
-    crm_xml_add(notify_data, F_STONITH_CLIENTNAME, op->client_name);
+    crm_xml_add_int(notify_data, PCMK_XA_STATE, op->state);
+    crm_xml_add(notify_data, PCMK__XA_ST_TARGET, op->target);
+    crm_xml_add(notify_data, PCMK__XA_ST_DEVICE_ACTION, op->action);
+    crm_xml_add(notify_data, PCMK__XA_ST_DELEGATE, op->delegate);
+    crm_xml_add(notify_data, PCMK__XA_ST_REMOTE_OP, op->id);
+    crm_xml_add(notify_data, PCMK__XA_ST_ORIGIN, op->originator);
+    crm_xml_add(notify_data, PCMK__XA_ST_CLIENTID, op->client_id);
+    crm_xml_add(notify_data, PCMK__XA_ST_CLIENTNAME, op->client_name);
 
     return notify_data;
 }
@@ -403,25 +403,26 @@ void
 fenced_broadcast_op_result(const remote_fencing_op_t *op, bool op_merged)
 {
     static int count = 0;
-    xmlNode *bcast = create_xml_node(NULL, T_STONITH_REPLY);
-    xmlNode *notify_data = fencing_result2xml(op);
+    xmlNode *bcast = pcmk__xe_create(NULL, PCMK__XE_ST_REPLY);
+    xmlNode *wrapper = NULL;
+    xmlNode *notify_data = NULL;
 
     count++;
     crm_trace("Broadcasting result to peers");
-    crm_xml_add(bcast, F_TYPE, T_STONITH_NOTIFY);
-    crm_xml_add(bcast, F_SUBTYPE, "broadcast");
-    crm_xml_add(bcast, F_STONITH_OPERATION, T_STONITH_NOTIFY);
-    crm_xml_add_int(bcast, "count", count);
+    crm_xml_add(bcast, PCMK__XA_T, PCMK__VALUE_ST_NOTIFY);
+    crm_xml_add(bcast, PCMK__XA_SUBT, PCMK__VALUE_BROADCAST);
+    crm_xml_add(bcast, PCMK__XA_ST_OP, STONITH_OP_NOTIFY);
+    crm_xml_add_int(bcast, PCMK_XA_COUNT, count);
 
     if (op_merged) {
-        pcmk__xe_set_bool_attr(bcast, F_STONITH_MERGED, true);
+        pcmk__xe_set_bool_attr(bcast, PCMK__XA_ST_OP_MERGED, true);
     }
 
+    wrapper = pcmk__xe_create(bcast, PCMK__XE_ST_CALLDATA);
+    notify_data = fencing_result2xml(wrapper, op);
     stonith__xe_set_result(notify_data, &op->result);
 
-    add_message_xml(bcast, F_STONITH_CALLDATA, notify_data);
-    send_cluster_message(NULL, crm_msg_stonith_ng, bcast, FALSE);
-    free_xml(notify_data);
+    pcmk__cluster_send_message(NULL, crm_msg_stonith_ng, bcast);
     free_xml(bcast);
 
     return;
@@ -447,12 +448,12 @@ handle_local_reply_and_notify(remote_fencing_op_t *op, xmlNode *data)
     }
 
     /* Do notification with a clean data object */
-    crm_xml_add_int(data, "state", op->state);
-    crm_xml_add(data, F_STONITH_TARGET, op->target);
-    crm_xml_add(data, F_STONITH_OPERATION, op->action);
+    crm_xml_add_int(data, PCMK_XA_STATE, op->state);
+    crm_xml_add(data, PCMK__XA_ST_TARGET, op->target);
+    crm_xml_add(data, PCMK__XA_ST_OP, op->action);
 
     reply = fenced_construct_reply(op->request, data, &op->result);
-    crm_xml_add(reply, F_STONITH_DELEGATE, op->delegate);
+    crm_xml_add(reply, PCMK__XA_ST_DELEGATE, op->delegate);
 
     /* Send fencing OP reply to local client that initiated fencing */
     client = pcmk__find_client_by_id(op->client_id);
@@ -463,10 +464,11 @@ handle_local_reply_and_notify(remote_fencing_op_t *op, xmlNode *data)
     }
 
     /* bcast to all local clients that the fencing operation happend */
-    notify_data = fencing_result2xml(op);
-    fenced_send_notification(T_STONITH_NOTIFY_FENCE, &op->result, notify_data);
+    notify_data = fencing_result2xml(NULL, op);
+    fenced_send_notification(PCMK__VALUE_ST_NOTIFY_FENCE, &op->result,
+                             notify_data);
     free_xml(notify_data);
-    fenced_send_notification(T_STONITH_NOTIFY_HISTORY, NULL, NULL);
+    fenced_send_notification(PCMK__VALUE_ST_NOTIFY_HISTORY, NULL, NULL);
 
     /* mark this op as having notify's already sent */
     op->notify_sent = TRUE;
@@ -509,12 +511,13 @@ finalize_op_duplicates(remote_fencing_op_t *op, xmlNode *data)
 static char *
 delegate_from_xml(xmlNode *xml)
 {
-    xmlNode *match = get_xpath_object("//@" F_STONITH_DELEGATE, xml, LOG_NEVER);
+    xmlNode *match = get_xpath_object("//@" PCMK__XA_ST_DELEGATE, xml,
+                                      LOG_NEVER);
 
     if (match == NULL) {
-        return crm_element_value_copy(xml, F_ORIG);
+        return crm_element_value_copy(xml, PCMK__XA_SRC);
     } else {
-        return crm_element_value_copy(match, F_STONITH_DELEGATE);
+        return crm_element_value_copy(match, PCMK__XA_ST_DELEGATE);
     }
 }
 
@@ -564,7 +567,7 @@ finalize_op(remote_fencing_op_t *op, xmlNode *data, bool dup)
     undo_op_remap(op);
 
     if (data == NULL) {
-        data = create_xml_node(NULL, "remote-op");
+        data = pcmk__xe_create(NULL, "remote-op");
         local_data = data;
 
     } else if (op->delegate == NULL) {
@@ -584,15 +587,15 @@ finalize_op(remote_fencing_op_t *op, xmlNode *data, bool dup)
         }
     }
 
-    if (dup || (crm_element_value(data, F_STONITH_MERGED) != NULL)) {
+    if (dup || (crm_element_value(data, PCMK__XA_ST_OP_MERGED) != NULL)) {
         op_merged = true;
     }
 
     /* Tell everyone the operation is done, we will continue
      * with doing the local notifications once we receive
      * the broadcast back. */
-    subt = crm_element_value(data, F_SUBTYPE);
-    if (!dup && !pcmk__str_eq(subt, "broadcast", pcmk__str_casei)) {
+    subt = crm_element_value(data, PCMK__XA_SUBT);
+    if (!dup && !pcmk__str_eq(subt, PCMK__VALUE_BROADCAST, pcmk__str_none)) {
         /* Defer notification until the bcast message arrives */
         fenced_broadcast_op_result(op, op_merged);
         free_xml(local_data);
@@ -800,7 +803,8 @@ add_required_device(remote_fencing_op_t *op, const char *device)
                                          sort_strings);
 
     if (!match) {
-        op->automatic_list = g_list_prepend(op->automatic_list, strdup(device));
+        op->automatic_list = g_list_prepend(op->automatic_list,
+                                            pcmk__str_copy(device));
     }
 }
 
@@ -833,7 +837,10 @@ set_op_device_list(remote_fencing_op_t * op, GList *devices)
         op->devices_list = NULL;
     }
     for (lpc = devices; lpc != NULL; lpc = lpc->next) {
-        op->devices_list = g_list_append(op->devices_list, strdup(lpc->data));
+        const char *device = lpc->data;
+
+        op->devices_list = g_list_append(op->devices_list,
+                                         pcmk__str_copy(device));
     }
     op->devices = op->devices_list;
 }
@@ -1001,6 +1008,7 @@ merge_duplicates(remote_fencing_op_t *op)
     g_hash_table_iter_init(&iter, stonith_remote_op_list);
     while (g_hash_table_iter_next(&iter, NULL, (void **)&other)) {
         const char *other_action = op_requested_action(other);
+        crm_node_t *node = NULL;
 
         if (!strcmp(op->id, other->id)) {
             continue; // Don't compare against self
@@ -1030,7 +1038,11 @@ merge_duplicates(remote_fencing_op_t *op)
                       op->id, other->id, other->target);
             continue;
         }
-        if (!fencing_peer_active(crm_get_peer(0, other->originator))) {
+
+        node = pcmk__get_node(0, other->originator, NULL,
+                              pcmk__node_search_cluster_member);
+
+        if (!fencing_peer_active(node)) {
             crm_notice("Failing action '%s' targeting %s originating from "
                        "client %s@%s: Originator is dead " CRM_XS " id=%.8s",
                        other->action, other->target, other->client_name,
@@ -1042,8 +1054,8 @@ merge_duplicates(remote_fencing_op_t *op)
         }
         if ((other->total_timeout > 0)
             && (now > (other->total_timeout + other->created))) {
-            crm_trace("%.8s not duplicate of %.8s: old (%ld vs. %ld + %d)",
-                      op->id, other->id, now, other->created,
+            crm_trace("%.8s not duplicate of %.8s: old (%lld vs. %lld + %ds)",
+                      op->id, other->id, (long long)now, (long long)other->created,
                       other->total_timeout);
             continue;
         }
@@ -1055,7 +1067,7 @@ merge_duplicates(remote_fencing_op_t *op)
         if (other->total_timeout == 0) {
             other->total_timeout = op->total_timeout =
                 TIMEOUT_MULTIPLY_FACTOR * get_op_total_timeout(op, NULL);
-            crm_trace("Best guess as to timeout used for %.8s: %d",
+            crm_trace("Best guess as to timeout used for %.8s: %ds",
                       other->id, other->total_timeout);
         }
         crm_notice("Merging fencing action '%s' targeting %s originating from "
@@ -1097,12 +1109,12 @@ int
 fenced_handle_manual_confirmation(const pcmk__client_t *client, xmlNode *msg)
 {
     remote_fencing_op_t *op = NULL;
-    xmlNode *dev = get_xpath_object("//@" F_STONITH_TARGET, msg, LOG_ERR);
+    xmlNode *dev = get_xpath_object("//@" PCMK__XA_ST_TARGET, msg, LOG_ERR);
 
     CRM_CHECK(dev != NULL, return EPROTO);
 
     crm_notice("Received manual confirmation that %s has been fenced",
-               pcmk__s(crm_element_value(dev, F_STONITH_TARGET),
+               pcmk__s(crm_element_value(dev, PCMK__XA_ST_TARGET),
                        "unknown target"));
     op = initiate_remote_stonith_op(client, msg, TRUE);
     if (op == NULL) {
@@ -1110,7 +1122,7 @@ fenced_handle_manual_confirmation(const pcmk__client_t *client, xmlNode *msg)
     }
     op->state = st_done;
     set_fencing_completed(op);
-    op->delegate = strdup("a human");
+    op->delegate = pcmk__str_copy("a human");
 
     // For the fencer's purposes, the fencing operation is done
     pcmk__set_result(&op->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL);
@@ -1137,7 +1149,8 @@ void *
 create_remote_stonith_op(const char *client, xmlNode *request, gboolean peer)
 {
     remote_fencing_op_t *op = NULL;
-    xmlNode *dev = get_xpath_object("//@" F_STONITH_TARGET, request, LOG_NEVER);
+    xmlNode *dev = get_xpath_object("//@" PCMK__XA_ST_TARGET, request,
+                                    LOG_NEVER);
     int call_options = 0;
     const char *operation = NULL;
 
@@ -1146,7 +1159,7 @@ create_remote_stonith_op(const char *client, xmlNode *request, gboolean peer)
     /* If this operation is owned by another node, check to make
      * sure we haven't already created this operation. */
     if (peer && dev) {
-        const char *op_id = crm_element_value(dev, F_STONITH_REMOTE_OP_ID);
+        const char *op_id = crm_element_value(dev, PCMK__XA_ST_REMOTE_OP);
 
         CRM_CHECK(op_id != NULL, return NULL);
 
@@ -1158,15 +1171,14 @@ create_remote_stonith_op(const char *client, xmlNode *request, gboolean peer)
         }
     }
 
-    op = calloc(1, sizeof(remote_fencing_op_t));
-    CRM_ASSERT(op != NULL);
+    op = pcmk__assert_alloc(1, sizeof(remote_fencing_op_t));
 
-    crm_element_value_int(request, F_STONITH_TIMEOUT, &(op->base_timeout));
+    crm_element_value_int(request, PCMK__XA_ST_TIMEOUT, &(op->base_timeout));
     // Value -1 means disable any static/random fencing delays
-    crm_element_value_int(request, F_STONITH_DELAY, &(op->client_delay));
+    crm_element_value_int(request, PCMK__XA_ST_DELAY, &(op->client_delay));
 
     if (peer && dev) {
-        op->id = crm_element_value_copy(dev, F_STONITH_REMOTE_OP_ID);
+        op->id = crm_element_value_copy(dev, PCMK__XA_ST_REMOTE_OP);
     } else {
         op->id = crm_generate_uuid();
     }
@@ -1175,41 +1187,49 @@ create_remote_stonith_op(const char *client, xmlNode *request, gboolean peer)
 
     op->state = st_query;
     op->replies_expected = fencing_active_peers();
-    op->action = crm_element_value_copy(dev, F_STONITH_ACTION);
-    op->originator = crm_element_value_copy(dev, F_STONITH_ORIGIN);
-    op->delegate = crm_element_value_copy(dev, F_STONITH_DELEGATE); /* May not be set */
-    op->created = time(NULL);
+    op->action = crm_element_value_copy(dev, PCMK__XA_ST_DEVICE_ACTION);
 
+    /* The node initiating the stonith operation. If an operation is relayed,
+     * this is the last node the operation lands on. When in standalone mode,
+     * origin is the ID of the client that originated the operation.
+     *
+     * Or may be the name of the function that created the operation.
+     */
+    op->originator = crm_element_value_copy(dev, PCMK__XA_ST_ORIGIN);
     if (op->originator == NULL) {
         /* Local or relayed request */
-        op->originator = strdup(stonith_our_uname);
+        op->originator = pcmk__str_copy(stonith_our_uname);
     }
 
-    CRM_LOG_ASSERT(client != NULL);
-    if (client) {
-        op->client_id = strdup(client);
-    }
+    // Delegate may not be set
+    op->delegate = crm_element_value_copy(dev, PCMK__XA_ST_DELEGATE);
+    op->created = time(NULL);
 
+    CRM_LOG_ASSERT(client != NULL);
+    op->client_id = pcmk__str_copy(client);
 
     /* For a RELAY operation, set fenced on the client. */
-    operation = crm_element_value(request, F_STONITH_OPERATION);
+    operation = crm_element_value(request, PCMK__XA_ST_OP);
 
     if (pcmk__str_eq(operation, STONITH_OP_RELAY, pcmk__str_none)) {
         op->client_name = crm_strdup_printf("%s.%lu", crm_system_name,
                                          (unsigned long) getpid());
     } else {
-        op->client_name = crm_element_value_copy(request, F_STONITH_CLIENTNAME);
+        op->client_name = crm_element_value_copy(request,
+                                                 PCMK__XA_ST_CLIENTNAME);
     }
 
-    op->target = crm_element_value_copy(dev, F_STONITH_TARGET);
-    op->request = copy_xml(request);    /* TODO: Figure out how to avoid this */
-    crm_element_value_int(request, F_STONITH_CALLOPTS, &call_options);
+    op->target = crm_element_value_copy(dev, PCMK__XA_ST_TARGET);
+
+    // @TODO Figure out how to avoid copying XML here
+    op->request = pcmk__xml_copy(NULL, request);
+    crm_element_value_int(request, PCMK__XA_ST_CALLOPT, &call_options);
     op->call_options = call_options;
 
-    crm_element_value_int(request, F_STONITH_CALLID, &(op->client_callid));
+    crm_element_value_int(request, PCMK__XA_ST_CALLID, &(op->client_callid));
 
     crm_trace("%s new fencing op %s ('%s' targeting %s for client %s, "
-              "base timeout %d, %u %s expected)",
+              "base timeout %ds, %u %s expected)",
               (peer && dev)? "Recorded" : "Generated", op->id, op->action,
               op->target, op->client_name, op->base_timeout,
               op->replies_expected,
@@ -1220,14 +1240,15 @@ create_remote_stonith_op(const char *client, xmlNode *request, gboolean peer)
         crm_node_t *node;
 
         pcmk__scan_min_int(op->target, &nodeid, 0);
-        node = pcmk__search_known_node_cache(nodeid, NULL, CRM_GET_PEER_ANY);
+        node = pcmk__search_node_caches(nodeid, NULL,
+                                        pcmk__node_search_any
+                                        |pcmk__node_search_cluster_cib);
 
         /* Ensure the conversion only happens once */
         stonith__clear_call_options(op->call_options, op->id, st_opt_cs_nodeid);
 
         if (node && node->uname) {
-            free(op->target);
-            op->target = strdup(node->uname);
+            pcmk__str_update(&(op->target), node->uname);
 
         } else {
             crm_warn("Could not expand nodeid '%s' into a host name", op->target);
@@ -1239,7 +1260,7 @@ create_remote_stonith_op(const char *client, xmlNode *request, gboolean peer)
 
     if (op->state != st_duplicate) {
         /* kick history readers */
-        fenced_send_notification(T_STONITH_NOTIFY_HISTORY, NULL, NULL);
+        fenced_send_notification(PCMK__VALUE_ST_NOTIFY_HISTORY, NULL, NULL);
     }
 
     /* safe to trim as long as that doesn't touch pending ops */
@@ -1272,7 +1293,7 @@ initiate_remote_stonith_op(const pcmk__client_t *client, xmlNode *request,
     if (client) {
         client_id = client->id;
     } else {
-        client_id = crm_element_value(request, F_STONITH_CLIENTID);
+        client_id = crm_element_value(request, PCMK__XA_ST_CLIENTID);
     }
 
     CRM_LOG_ASSERT(client_id != NULL);
@@ -1305,7 +1326,7 @@ initiate_remote_stonith_op(const pcmk__client_t *client, xmlNode *request,
 
         default:
             crm_notice("Requesting peer fencing (%s) targeting %s "
-                       CRM_XS " id=%.8s state=%s base_timeout=%d",
+                       CRM_XS " id=%.8s state=%s base_timeout=%ds",
                        op->action, op->target, op->id,
                        stonith_op_state_str(op->state), op->base_timeout);
     }
@@ -1313,24 +1334,24 @@ initiate_remote_stonith_op(const pcmk__client_t *client, xmlNode *request,
     query = stonith_create_op(op->client_callid, op->id, STONITH_OP_QUERY,
                               NULL, op->call_options);
 
-    crm_xml_add(query, F_STONITH_REMOTE_OP_ID, op->id);
-    crm_xml_add(query, F_STONITH_TARGET, op->target);
-    crm_xml_add(query, F_STONITH_ACTION, op_requested_action(op));
-    crm_xml_add(query, F_STONITH_ORIGIN, op->originator);
-    crm_xml_add(query, F_STONITH_CLIENTID, op->client_id);
-    crm_xml_add(query, F_STONITH_CLIENTNAME, op->client_name);
-    crm_xml_add_int(query, F_STONITH_TIMEOUT, op->base_timeout);
+    crm_xml_add(query, PCMK__XA_ST_REMOTE_OP, op->id);
+    crm_xml_add(query, PCMK__XA_ST_TARGET, op->target);
+    crm_xml_add(query, PCMK__XA_ST_DEVICE_ACTION, op_requested_action(op));
+    crm_xml_add(query, PCMK__XA_ST_ORIGIN, op->originator);
+    crm_xml_add(query, PCMK__XA_ST_CLIENTID, op->client_id);
+    crm_xml_add(query, PCMK__XA_ST_CLIENTNAME, op->client_name);
+    crm_xml_add_int(query, PCMK__XA_ST_TIMEOUT, op->base_timeout);
 
     /* In case of RELAY operation, RELAY information is added to the query to delete the original operation of RELAY. */
-    operation = crm_element_value(request, F_STONITH_OPERATION);
+    operation = crm_element_value(request, PCMK__XA_ST_OP);
     if (pcmk__str_eq(operation, STONITH_OP_RELAY, pcmk__str_none)) {
-        relay_op_id = crm_element_value(request, F_STONITH_REMOTE_OP_ID);
+        relay_op_id = crm_element_value(request, PCMK__XA_ST_REMOTE_OP);
         if (relay_op_id) {
-            crm_xml_add(query, F_STONITH_REMOTE_OP_ID_RELAY, relay_op_id);
+            crm_xml_add(query, PCMK__XA_ST_REMOTE_OP_RELAY, relay_op_id);
         }
     }
 
-    send_cluster_message(NULL, crm_msg_stonith_ng, query, FALSE);
+    pcmk__cluster_send_message(NULL, crm_msg_stonith_ng, query);
     free_xml(query);
 
     query_timeout = op->base_timeout * TIMEOUT_MULTIPLY_FACTOR;
@@ -1348,6 +1369,16 @@ enum find_best_peer_options {
     FIND_PEER_VERIFIED_ONLY = 0x0004,
 };
 
+static bool
+is_watchdog_fencing(const remote_fencing_op_t *op, const char *device)
+{
+    return (stonith_watchdog_timeout_ms > 0
+            // Only an explicit mismatch is considered not a watchdog fencing.
+            && pcmk__str_eq(device, STONITH_WATCHDOG_ID, pcmk__str_null_matches)
+            && pcmk__is_fencing_action(op->action)
+            && node_does_watchdog_fencing(op->target));
+}
+
 static peer_device_info_t *
 find_best_peer(const char *device, remote_fencing_op_t * op, enum find_best_peer_options options)
 {
@@ -1443,10 +1474,10 @@ stonith_choose_peer(remote_fencing_op_t * op)
              && pcmk_is_set(op->call_options, st_opt_topology)
              && (advance_topology_level(op, false) == pcmk_rc_ok));
 
-    if ((stonith_watchdog_timeout_ms > 0)
-        && pcmk__is_fencing_action(op->action)
-        && pcmk__str_eq(device, STONITH_WATCHDOG_ID, pcmk__str_none)
-        && node_does_watchdog_fencing(op->target)) {
+    /* With a simple watchdog fencing configuration without a topology,
+     * "device" is NULL here. Consider it should be done with watchdog fencing.
+     */
+    if (is_watchdog_fencing(op, device)) {
         crm_info("Couldn't contact watchdog-fencing target-node (%s)",
                  op->target);
         /* check_watchdog_fencing_and_wait will log additional info */
@@ -1458,32 +1489,69 @@ stonith_choose_peer(remote_fencing_op_t * op)
 }
 
 static int
+valid_fencing_timeout(int specified_timeout, bool action_specific,
+                      const remote_fencing_op_t *op, const char *device)
+{
+    int timeout = specified_timeout;
+
+    if (!is_watchdog_fencing(op, device)) {
+        return timeout;
+    }
+
+    timeout = (int) QB_MIN(QB_MAX(specified_timeout,
+                                  stonith_watchdog_timeout_ms / 1000), INT_MAX);
+
+    if (timeout > specified_timeout) {
+        if (action_specific) {
+            crm_warn("pcmk_%s_timeout %ds for %s is too short (must be >= "
+                     PCMK_OPT_STONITH_WATCHDOG_TIMEOUT " %ds), using %ds "
+                     "instead",
+                     op->action, specified_timeout, device? device : "watchdog",
+                     timeout, timeout);
+
+        } else {
+            crm_warn("Fencing timeout %ds is too short (must be >= "
+                     PCMK_OPT_STONITH_WATCHDOG_TIMEOUT " %ds), using %ds "
+                     "instead",
+                     specified_timeout, timeout, timeout);
+        }
+    }
+
+    return timeout;
+}
+
+static int
 get_device_timeout(const remote_fencing_op_t *op,
                    const peer_device_info_t *peer, const char *device,
                    bool with_delay)
 {
+    int timeout = op->base_timeout;
     device_properties_t *props;
-    int delay = 0;
+
+    timeout = valid_fencing_timeout(op->base_timeout, false, op, device);
 
     if (!peer || !device) {
-        return op->base_timeout;
+        return timeout;
     }
 
     props = g_hash_table_lookup(peer->devices, device);
     if (!props) {
-        return op->base_timeout;
+        return timeout;
+    }
+
+    if (props->custom_action_timeout[op->phase]) {
+        timeout = valid_fencing_timeout(props->custom_action_timeout[op->phase],
+                                        true, op, device);
     }
 
     // op->client_delay < 0 means disable any static/random fencing delays
     if (with_delay && (op->client_delay >= 0)) {
         // delay_base is eventually limited by delay_max
-        delay = (props->delay_max[op->phase] > 0 ?
-                 props->delay_max[op->phase] : props->delay_base[op->phase]);
+        timeout += (props->delay_max[op->phase] > 0 ?
+                    props->delay_max[op->phase] : props->delay_base[op->phase]);
     }
 
-    return (props->custom_action_timeout[op->phase]?
-            props->custom_action_timeout[op->phase] : op->base_timeout)
-           + delay;
+    return timeout;
 }
 
 struct timeout_data {
@@ -1532,7 +1600,7 @@ static int
 get_op_total_timeout(const remote_fencing_op_t *op,
                      const peer_device_info_t *chosen_peer)
 {
-    int total_timeout = 0;
+    long long total_timeout = 0;
     stonith_topology_t *tp = find_topology_for_host(op->target);
 
     if (pcmk_is_set(op->call_options, st_opt_topology) && tp) {
@@ -1558,17 +1626,7 @@ get_op_total_timeout(const remote_fencing_op_t *op,
                 continue;
             }
             for (device_list = tp->levels[i]; device_list; device_list = device_list->next) {
-                /* in case of watchdog-device we add the timeout to the budget
-                   regardless of if we got a reply or not
-                 */
-                if ((stonith_watchdog_timeout_ms > 0)
-                    && pcmk__is_fencing_action(op->action)
-                    && pcmk__str_eq(device_list->data, STONITH_WATCHDOG_ID,
-                                    pcmk__str_none)
-                    && node_does_watchdog_fencing(op->target)) {
-                    total_timeout += stonith_watchdog_timeout_ms / 1000;
-                    continue;
-                }
+                bool found = false;
 
                 for (iter = op->query_results; iter != NULL; iter = iter->next) {
                     const peer_device_info_t *peer = iter->data;
@@ -1586,9 +1644,17 @@ get_op_total_timeout(const remote_fencing_op_t *op,
                         total_timeout += get_device_timeout(op, peer,
                                                             device_list->data,
                                                             true);
+                        found = true;
                         break;
                     }
                 }               /* End Loop3: match device with peer that owns device, find device's timeout period */
+
+                /* in case of watchdog-device we add the timeout to the budget
+                   if didn't get a reply
+                 */
+                if (!found && is_watchdog_fencing(op, device_list->data)) {
+                    total_timeout += stonith_watchdog_timeout_ms / 1000;
+                }
             }                   /* End Loop2: iterate through devices at a specific level */
         }                       /*End Loop1: iterate through fencing levels */
 
@@ -1612,15 +1678,23 @@ get_op_total_timeout(const remote_fencing_op_t *op,
 
     } else if (chosen_peer) {
         total_timeout = get_peer_timeout(op, chosen_peer);
+
     } else {
+        total_timeout = valid_fencing_timeout(op->base_timeout, false, op,
+                                              NULL);
+    }
+
+    if (total_timeout <= 0) {
         total_timeout = op->base_timeout;
     }
 
     /* Take any requested fencing delay into account to prevent it from eating
      * up the total timeout.
      */
-    return ((total_timeout ? total_timeout : op->base_timeout)
-            + ((op->client_delay > 0)? op->client_delay : 0));
+    if (op->client_delay > 0) {
+        total_timeout += op->client_delay;
+    }
+    return (int) QB_MIN(total_timeout, INT_MAX);
 }
 
 static void
@@ -1643,9 +1717,9 @@ report_timeout_period(remote_fencing_op_t * op, int op_timeout)
     }
 
     crm_trace("Reporting timeout for %s (id=%.8s)", op->client_name, op->id);
-    client_node = crm_element_value(op->request, F_STONITH_CLIENTNODE);
-    call_id = crm_element_value(op->request, F_STONITH_CALLID);
-    client_id = crm_element_value(op->request, F_STONITH_CLIENTID);
+    client_node = crm_element_value(op->request, PCMK__XA_ST_CLIENTNODE);
+    call_id = crm_element_value(op->request, PCMK__XA_ST_CALLID);
+    client_id = crm_element_value(op->request, PCMK__XA_ST_CLIENTID);
     if (!client_node || !call_id || !client_id) {
         return;
     }
@@ -1658,12 +1732,14 @@ report_timeout_period(remote_fencing_op_t * op, int op_timeout)
 
     /* The client is connected to another node, relay this update to them */
     update = stonith_create_op(op->client_callid, op->id, STONITH_OP_TIMEOUT_UPDATE, NULL, 0);
-    crm_xml_add(update, F_STONITH_REMOTE_OP_ID, op->id);
-    crm_xml_add(update, F_STONITH_CLIENTID, client_id);
-    crm_xml_add(update, F_STONITH_CALLID, call_id);
-    crm_xml_add_int(update, F_STONITH_TIMEOUT, op_timeout);
+    crm_xml_add(update, PCMK__XA_ST_REMOTE_OP, op->id);
+    crm_xml_add(update, PCMK__XA_ST_CLIENTID, client_id);
+    crm_xml_add(update, PCMK__XA_ST_CALLID, call_id);
+    crm_xml_add_int(update, PCMK__XA_ST_TIMEOUT, op_timeout);
 
-    send_cluster_message(crm_get_peer(0, client_node), crm_msg_stonith_ng, update, FALSE);
+    pcmk__cluster_send_message(pcmk__get_node(0, client_node, NULL,
+                                              pcmk__node_search_cluster_member),
+                               crm_msg_stonith_ng, update);
 
     free_xml(update);
 
@@ -1742,17 +1818,18 @@ static gboolean
 check_watchdog_fencing_and_wait(remote_fencing_op_t * op)
 {
     if (node_does_watchdog_fencing(op->target)) {
+        guint timeout_ms = QB_MIN(stonith_watchdog_timeout_ms, UINT_MAX);
 
-        crm_notice("Waiting %lds for %s to self-fence (%s) for "
+        crm_notice("Waiting %s for %s to self-fence (%s) for "
                    "client %s " CRM_XS " id=%.8s",
-                   (stonith_watchdog_timeout_ms / 1000),
-                   op->target, op->action, op->client_name, op->id);
+                   pcmk__readable_interval(timeout_ms), op->target, op->action,
+                   op->client_name, op->id);
 
         if (op->op_timer_one) {
             g_source_remove(op->op_timer_one);
         }
-        op->op_timer_one = g_timeout_add(stonith_watchdog_timeout_ms,
-                                         remote_op_watchdog_done, op);
+        op->op_timer_one = g_timeout_add(timeout_ms, remote_op_watchdog_done,
+                                         op);
         return TRUE;
     } else {
         crm_debug("Skipping fallback to watchdog-fencing as %s is "
@@ -1819,7 +1896,7 @@ request_peer_fencing(remote_fencing_op_t *op, peer_device_info_t *peer)
         op->total_timeout = TIMEOUT_MULTIPLY_FACTOR * get_op_total_timeout(op, peer);
         op->op_timer_total = g_timeout_add(1000 * op->total_timeout, remote_op_timeout, op);
         report_timeout_period(op, op->total_timeout);
-        crm_info("Total timeout set to %d for peer's fencing targeting %s for %s"
+        crm_info("Total timeout set to %ds for peer's fencing targeting %s for %s"
                  CRM_XS "id=%.8s",
                  op->total_timeout, op->target, op->client_name, op->id);
     }
@@ -1846,6 +1923,9 @@ request_peer_fencing(remote_fencing_op_t *op, peer_device_info_t *peer)
     if (peer) {
         int timeout_one = 0;
         xmlNode *remote_op = stonith_create_op(op->client_callid, op->id, STONITH_OP_FENCE, NULL, 0);
+        const crm_node_t *peer_node =
+            pcmk__get_node(0, peer->host, NULL,
+                           pcmk__node_search_cluster_member);
 
         if (op->client_delay > 0) {
            /* Take requested fencing delay into account to prevent it from
@@ -1854,15 +1934,15 @@ request_peer_fencing(remote_fencing_op_t *op, peer_device_info_t *peer)
             timeout_one = TIMEOUT_MULTIPLY_FACTOR * op->client_delay;
         }
 
-        crm_xml_add(remote_op, F_STONITH_REMOTE_OP_ID, op->id);
-        crm_xml_add(remote_op, F_STONITH_TARGET, op->target);
-        crm_xml_add(remote_op, F_STONITH_ACTION, op->action);
-        crm_xml_add(remote_op, F_STONITH_ORIGIN, op->originator);
-        crm_xml_add(remote_op, F_STONITH_CLIENTID, op->client_id);
-        crm_xml_add(remote_op, F_STONITH_CLIENTNAME, op->client_name);
-        crm_xml_add_int(remote_op, F_STONITH_TIMEOUT, timeout);
-        crm_xml_add_int(remote_op, F_STONITH_CALLOPTS, op->call_options);
-        crm_xml_add_int(remote_op, F_STONITH_DELAY, op->client_delay);
+        crm_xml_add(remote_op, PCMK__XA_ST_REMOTE_OP, op->id);
+        crm_xml_add(remote_op, PCMK__XA_ST_TARGET, op->target);
+        crm_xml_add(remote_op, PCMK__XA_ST_DEVICE_ACTION, op->action);
+        crm_xml_add(remote_op, PCMK__XA_ST_ORIGIN, op->originator);
+        crm_xml_add(remote_op, PCMK__XA_ST_CLIENTID, op->client_id);
+        crm_xml_add(remote_op, PCMK__XA_ST_CLIENTNAME, op->client_name);
+        crm_xml_add_int(remote_op, PCMK__XA_ST_TIMEOUT, timeout);
+        crm_xml_add_int(remote_op, PCMK__XA_ST_CALLOPT, op->call_options);
+        crm_xml_add_int(remote_op, PCMK__XA_ST_DELAY, op->client_delay);
 
         if (device) {
             timeout_one += TIMEOUT_MULTIPLY_FACTOR *
@@ -1871,14 +1951,15 @@ request_peer_fencing(remote_fencing_op_t *op, peer_device_info_t *peer)
                        "using %s " CRM_XS " for client %s (%ds)",
                        peer->host, op->action, op->target, device,
                        op->client_name, timeout_one);
-            crm_xml_add(remote_op, F_STONITH_DEVICE, device);
+            crm_xml_add(remote_op, PCMK__XA_ST_DEVICE_ID, device);
 
         } else {
             timeout_one += TIMEOUT_MULTIPLY_FACTOR * get_peer_timeout(op, peer);
             crm_notice("Requesting that %s perform '%s' action targeting %s "
-                       CRM_XS " for client %s (%ds, %lds)",
+                       CRM_XS " for client %s (%ds, %s)",
                        peer->host, op->action, op->target, op->client_name,
-                       timeout_one, stonith_watchdog_timeout_ms);
+                       timeout_one,
+                       pcmk__readable_interval(stonith_watchdog_timeout_ms));
         }
 
         op->state = st_exec;
@@ -1887,11 +1968,8 @@ request_peer_fencing(remote_fencing_op_t *op, peer_device_info_t *peer)
             op->op_timer_one = 0;
         }
 
-        if (!((stonith_watchdog_timeout_ms > 0)
-              && (pcmk__str_eq(device, STONITH_WATCHDOG_ID, pcmk__str_none)
-                  || (pcmk__str_eq(peer->host, op->target, pcmk__str_casei)
-                      && pcmk__is_fencing_action(op->action)))
-              && check_watchdog_fencing_and_wait(op))) {
+        if (!is_watchdog_fencing(op, device)
+            || !check_watchdog_fencing_and_wait(op)) {
 
             /* Some thoughts about self-fencing cases reaching this point:
                - Actually check in check_watchdog_fencing_and_wait
@@ -1907,8 +1985,8 @@ request_peer_fencing(remote_fencing_op_t *op, peer_device_info_t *peer)
                  enabled for a node but the watchdog-fencing-device isn't
                  explicitly chosen for suicide. Local pe-execution in sbd
                  may detect the node as unclean and lead to timely suicide.
-                 Otherwise the selection of stonith-watchdog-timeout at
-                 least is questionable.
+                 Otherwise the selection of PCMK_OPT_STONITH_WATCHDOG_TIMEOUT
+                 at least is questionable.
              */
 
             /* coming here we're not waiting for watchdog timeout -
@@ -1916,7 +1994,7 @@ request_peer_fencing(remote_fencing_op_t *op, peer_device_info_t *peer)
             op->op_timer_one = g_timeout_add((1000 * timeout_one), remote_op_timeout_one, op);
         }
 
-        send_cluster_message(crm_get_peer(0, peer->host), crm_msg_stonith_ng, remote_op, FALSE);
+        pcmk__cluster_send_message(peer_node, crm_msg_stonith_ng, remote_op);
         peer->tried = TRUE;
         free_xml(remote_op);
         return;
@@ -1948,11 +2026,15 @@ request_peer_fencing(remote_fencing_op_t *op, peer_device_info_t *peer)
          * but we have all the expected replies, then no devices
          * are available to execute the fencing operation. */
 
-        if(stonith_watchdog_timeout_ms > 0 && pcmk__str_eq(device,
-           STONITH_WATCHDOG_ID, pcmk__str_null_matches)) {
-            if (check_watchdog_fencing_and_wait(op)) {
-                return;
-            }
+        if (is_watchdog_fencing(op, device)
+            && check_watchdog_fencing_and_wait(op)) {
+            /* Consider a watchdog fencing targeting an offline node executing
+             * once it starts waiting for the target to self-fence. So that when
+             * the query timer pops, remote_op_query_timeout() considers the
+             * fencing already in progress.
+             */
+            op->state = st_exec;
+            return;
         }
 
         if (op->state == st_query) {
@@ -2078,24 +2160,25 @@ parse_action_specific(const xmlNode *xml, const char *peer, const char *device,
                       enum st_remap_phase phase, device_properties_t *props)
 {
     props->custom_action_timeout[phase] = 0;
-    crm_element_value_int(xml, F_STONITH_ACTION_TIMEOUT,
+    crm_element_value_int(xml, PCMK__XA_ST_ACTION_TIMEOUT,
                           &props->custom_action_timeout[phase]);
     if (props->custom_action_timeout[phase]) {
-        crm_trace("Peer %s with device %s returned %s action timeout %d",
+        crm_trace("Peer %s with device %s returned %s action timeout %ds",
                   peer, device, action, props->custom_action_timeout[phase]);
     }
 
     props->delay_max[phase] = 0;
-    crm_element_value_int(xml, F_STONITH_DELAY_MAX, &props->delay_max[phase]);
+    crm_element_value_int(xml, PCMK__XA_ST_DELAY_MAX, &props->delay_max[phase]);
     if (props->delay_max[phase]) {
-        crm_trace("Peer %s with device %s returned maximum of random delay %d for %s",
+        crm_trace("Peer %s with device %s returned maximum of random delay %ds for %s",
                   peer, device, props->delay_max[phase], action);
     }
 
     props->delay_base[phase] = 0;
-    crm_element_value_int(xml, F_STONITH_DELAY_BASE, &props->delay_base[phase]);
+    crm_element_value_int(xml, PCMK__XA_ST_DELAY_BASE,
+                          &props->delay_base[phase]);
     if (props->delay_base[phase]) {
-        crm_trace("Peer %s with device %s returned base delay %d for %s",
+        crm_trace("Peer %s with device %s returned base delay %ds for %s",
                   peer, device, props->delay_base[phase], action);
     }
 
@@ -2103,7 +2186,7 @@ parse_action_specific(const xmlNode *xml, const char *peer, const char *device,
     if (pcmk__str_eq(action, PCMK_ACTION_ON, pcmk__str_none)) {
         int required = 0;
 
-        crm_element_value_int(xml, F_STONITH_DEVICE_REQUIRED, &required);
+        crm_element_value_int(xml, PCMK__XA_ST_REQUIRED, &required);
         if (required) {
             crm_trace("Peer %s requires device %s to execute for action %s",
                       peer, device, action);
@@ -2114,7 +2197,7 @@ parse_action_specific(const xmlNode *xml, const char *peer, const char *device,
     /* If a reboot is remapped to off+on, it's possible that a node is allowed
      * to perform one action but not another.
      */
-    if (pcmk__xe_attr_is_true(xml, F_STONITH_ACTION_DISALLOWED)) {
+    if (pcmk__xe_attr_is_true(xml, PCMK__XA_ST_ACTION_DISALLOWED)) {
         props->disallowed[phase] = TRUE;
         crm_trace("Peer %s is disallowed from executing %s for device %s",
                   peer, action, device);
@@ -2136,37 +2219,39 @@ add_device_properties(const xmlNode *xml, remote_fencing_op_t *op,
 {
     xmlNode *child;
     int verified = 0;
-    device_properties_t *props = calloc(1, sizeof(device_properties_t));
+    device_properties_t *props =
+        pcmk__assert_alloc(1, sizeof(device_properties_t));
     int flags = st_device_supports_on; /* Old nodes that don't set the flag assume they support the on action */
 
     /* Add a new entry to this peer's devices list */
-    CRM_ASSERT(props != NULL);
-    g_hash_table_insert(peer->devices, strdup(device), props);
+    g_hash_table_insert(peer->devices, pcmk__str_copy(device), props);
 
     /* Peers with verified (monitored) access will be preferred */
-    crm_element_value_int(xml, F_STONITH_DEVICE_VERIFIED, &verified);
+    crm_element_value_int(xml, PCMK__XA_ST_MONITOR_VERIFIED, &verified);
     if (verified) {
         crm_trace("Peer %s has confirmed a verified device %s",
                   peer->host, device);
         props->verified = TRUE;
     }
 
-    crm_element_value_int(xml, F_STONITH_DEVICE_SUPPORT_FLAGS, &flags);
+    crm_element_value_int(xml, PCMK__XA_ST_DEVICE_SUPPORT_FLAGS, &flags);
     props->device_support_flags = flags;
 
     /* Parse action-specific device properties */
     parse_action_specific(xml, peer->host, device, op_requested_action(op),
                           op, st_phase_requested, props);
-    for (child = pcmk__xml_first_child(xml); child != NULL;
-         child = pcmk__xml_next(child)) {
+    for (child = pcmk__xe_first_child(xml, NULL, NULL, NULL); child != NULL;
+         child = pcmk__xe_next(child)) {
         /* Replies for "reboot" operations will include the action-specific
          * values for "off" and "on" in child elements, just in case the reboot
          * winds up getting remapped.
          */
-        if (pcmk__str_eq(ID(child), PCMK_ACTION_OFF, pcmk__str_none)) {
+        if (pcmk__str_eq(pcmk__xe_id(child), PCMK_ACTION_OFF, pcmk__str_none)) {
             parse_action_specific(child, peer->host, device, PCMK_ACTION_OFF,
                                   op, st_phase_off, props);
-        } else if (pcmk__str_eq(ID(child), PCMK_ACTION_ON, pcmk__str_none)) {
+
+        } else if (pcmk__str_eq(pcmk__xe_id(child), PCMK_ACTION_ON,
+                                pcmk__str_none)) {
             parse_action_specific(child, peer->host, device, PCMK_ACTION_ON,
                                   op, st_phase_on, props);
         }
@@ -2188,19 +2273,17 @@ static peer_device_info_t *
 add_result(remote_fencing_op_t *op, const char *host, int ndevices,
            const xmlNode *xml)
 {
-    peer_device_info_t *peer = calloc(1, sizeof(peer_device_info_t));
+    peer_device_info_t *peer = pcmk__assert_alloc(1,
+                                                  sizeof(peer_device_info_t));
     xmlNode *child;
 
-    // cppcheck seems not to understand the abort logic in CRM_CHECK
-    // cppcheck-suppress memleak
-    CRM_CHECK(peer != NULL, return NULL);
-    peer->host = strdup(host);
+    peer->host = pcmk__str_copy(host);
     peer->devices = pcmk__strkey_table(free, free);
 
     /* Each child element describes one capable device available to the peer */
-    for (child = pcmk__xml_first_child(xml); child != NULL;
-         child = pcmk__xml_next(child)) {
-        const char *device = ID(child);
+    for (child = pcmk__xe_first_child(xml, NULL, NULL, NULL); child != NULL;
+         child = pcmk__xe_next(child)) {
+        const char *device = pcmk__xe_id(child);
 
         if (device) {
             add_device_properties(child, op, peer, device);
@@ -2241,16 +2324,16 @@ process_remote_stonith_query(xmlNode *msg)
     remote_fencing_op_t *op = NULL;
     peer_device_info_t *peer = NULL;
     uint32_t replies_expected;
-    xmlNode *dev = get_xpath_object("//@" F_STONITH_REMOTE_OP_ID, msg, LOG_ERR);
+    xmlNode *dev = get_xpath_object("//@" PCMK__XA_ST_REMOTE_OP, msg, LOG_ERR);
 
     CRM_CHECK(dev != NULL, return -EPROTO);
 
-    id = crm_element_value(dev, F_STONITH_REMOTE_OP_ID);
+    id = crm_element_value(dev, PCMK__XA_ST_REMOTE_OP);
     CRM_CHECK(id != NULL, return -EPROTO);
 
-    dev = get_xpath_object("//@" F_STONITH_AVAILABLE_DEVICES, msg, LOG_ERR);
+    dev = get_xpath_object("//@" PCMK__XA_ST_AVAILABLE_DEVICES, msg, LOG_ERR);
     CRM_CHECK(dev != NULL, return -EPROTO);
-    crm_element_value_int(dev, F_STONITH_AVAILABLE_DEVICES, &ndevices);
+    crm_element_value_int(dev, PCMK__XA_ST_AVAILABLE_DEVICES, &ndevices);
 
     op = g_hash_table_lookup(stonith_remote_op_list, id);
     if (op == NULL) {
@@ -2266,7 +2349,7 @@ process_remote_stonith_query(xmlNode *msg)
     if ((++op->replies >= replies_expected) && (op->state == st_query)) {
         have_all_replies = TRUE;
     }
-    host = crm_element_value(msg, F_ORIG);
+    host = crm_element_value(msg, PCMK__XA_SRC);
     host_is_target = pcmk__str_eq(host, op->target, pcmk__str_casei);
 
     crm_info("Query result %d of %d from %s for %s/%s (%d device%s) %s",
@@ -2339,12 +2422,12 @@ fenced_process_fencing_reply(xmlNode *msg)
     const char *id = NULL;
     const char *device = NULL;
     remote_fencing_op_t *op = NULL;
-    xmlNode *dev = get_xpath_object("//@" F_STONITH_REMOTE_OP_ID, msg, LOG_ERR);
+    xmlNode *dev = get_xpath_object("//@" PCMK__XA_ST_REMOTE_OP, msg, LOG_ERR);
     pcmk__action_result_t result = PCMK__UNKNOWN_RESULT;
 
     CRM_CHECK(dev != NULL, return);
 
-    id = crm_element_value(dev, F_STONITH_REMOTE_OP_ID);
+    id = crm_element_value(dev, PCMK__XA_ST_REMOTE_OP);
     CRM_CHECK(id != NULL, return);
 
     dev = stonith__find_xe_with_result(msg);
@@ -2352,7 +2435,7 @@ fenced_process_fencing_reply(xmlNode *msg)
 
     stonith__xe_get_result(dev, &result);
 
-    device = crm_element_value(dev, F_STONITH_DEVICE);
+    device = crm_element_value(dev, PCMK__XA_ST_DEVICE_ID);
 
     if (stonith_remote_op_list) {
         op = g_hash_table_lookup(stonith_remote_op_list, id);
@@ -2360,7 +2443,7 @@ fenced_process_fencing_reply(xmlNode *msg)
 
     if ((op == NULL) && pcmk__result_ok(&result)) {
         /* Record successful fencing operations */
-        const char *client_id = crm_element_value(dev, F_STONITH_CLIENTID);
+        const char *client_id = crm_element_value(dev, PCMK__XA_ST_CLIENTID);
 
         op = create_remote_stonith_op(client_id, dev, TRUE);
     }
@@ -2383,7 +2466,9 @@ fenced_process_fencing_reply(xmlNode *msg)
         return;
     }
 
-    if (pcmk__str_eq(crm_element_value(msg, F_SUBTYPE), "broadcast", pcmk__str_casei)) {
+    if (pcmk__str_eq(crm_element_value(msg, PCMK__XA_SUBT),
+                     PCMK__VALUE_BROADCAST, pcmk__str_none)) {
+
         if (pcmk__result_ok(&op->result)) {
             op->state = st_done;
         } else {
@@ -2412,7 +2497,7 @@ fenced_process_fencing_reply(xmlNode *msg)
             return;
         }
 
-        device = crm_element_value(msg, F_STONITH_DEVICE);
+        device = crm_element_value(msg, PCMK__XA_ST_DEVICE_ID);
 
         if ((op->phase == 2) && !pcmk__result_ok(&op->result)) {
             /* A remapped "on" failed, but the node was already turned off
diff --git a/daemons/fenced/fenced_scheduler.c b/daemons/fenced/fenced_scheduler.c
index 27d990f..69e16fa 100644
--- a/daemons/fenced/fenced_scheduler.c
+++ b/daemons/fenced/fenced_scheduler.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2023 the Pacemaker project contributors
+ * Copyright 2009-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -124,14 +124,14 @@ register_if_fencing_device(gpointer data, gpointer user_data)
     if (rsc->children != NULL) {
         for (GList *iter = rsc->children; iter != NULL; iter = iter->next) {
             register_if_fencing_device(iter->data, NULL);
-            if (pe_rsc_is_clone(rsc)) {
+            if (pcmk__is_clone(rsc)) {
                 return; // Only one instance needs to be checked for clones
             }
         }
         return;
     }
 
-    rclass = crm_element_value(rsc->xml, XML_AGENT_ATTR_CLASS);
+    rclass = crm_element_value(rsc->xml, PCMK_XA_CLASS);
     if (!pcmk__str_eq(rclass, PCMK_RESOURCE_CLASS_STONITH, pcmk__str_casei)) {
         return; // Not a fencing device
     }
@@ -163,8 +163,7 @@ register_if_fencing_device(gpointer data, gpointer user_data)
     }
 
     // If device is in a group, check whether local node is allowed for group
-    if ((rsc->parent != NULL)
-        && (rsc->parent->variant == pcmk_rsc_variant_group)) {
+    if (pcmk__is_group(rsc->parent)) {
         pcmk_node_t *group_node = local_node_allowed_for(rsc->parent);
 
         if ((group_node != NULL) && (group_node->weight < 0)) {
@@ -177,8 +176,12 @@ register_if_fencing_device(gpointer data, gpointer user_data)
 
     crm_debug("Reloading configuration of fencing device %s", rsc->id);
 
-    agent = crm_element_value(rsc->xml, XML_EXPR_ATTR_TYPE);
+    agent = crm_element_value(rsc->xml, PCMK_XA_TYPE);
 
+    /* @COMPAT Support for node attribute expressions in rules for resource
+     * meta-attributes is deprecated. When we can break behavioral backward
+     * compatibility, replace node with NULL here.
+     */
     get_meta_attributes(rsc->meta, rsc, node, scheduler);
     rsc_provides = g_hash_table_lookup(rsc->meta, PCMK_STONITH_PROVIDES);
 
diff --git a/daemons/fenced/pacemaker-fenced.c b/daemons/fenced/pacemaker-fenced.c
index 7c69fb8..5ba97b5 100644
--- a/daemons/fenced/pacemaker-fenced.c
+++ b/daemons/fenced/pacemaker-fenced.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2023 the Pacemaker project contributors
+ * Copyright 2009-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -22,7 +22,6 @@
 #include <inttypes.h>  // PRIu32, PRIx32
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
 #include <crm/common/cmdline_internal.h>
 #include <crm/common/ipc.h>
 #include <crm/common/ipc_internal.h>
@@ -42,7 +41,7 @@
 #define SUMMARY "daemon for executing fencing devices in a Pacemaker cluster"
 
 char *stonith_our_uname = NULL;
-long stonith_watchdog_timeout_ms = 0;
+long long stonith_watchdog_timeout_ms = 0;
 GList *stonith_watchdog_targets = NULL;
 
 static GMainLoop *mainloop = NULL;
@@ -75,11 +74,11 @@ st_ipc_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
     if (stonith_shutdown_flag) {
         crm_info("Ignoring new client [%d] during shutdown",
                  pcmk__client_pid(c));
-        return -EPERM;
+        return -ECONNREFUSED;
     }
 
     if (pcmk__new_client(c, uid, gid) == NULL) {
-        return -EIO;
+        return -ENOMEM;
     }
     return 0;
 }
@@ -102,34 +101,31 @@ st_ipc_dispatch(qb_ipcs_connection_t * qbc, void *data, size_t size)
 
     request = pcmk__client_data2xml(c, data, &id, &flags);
     if (request == NULL) {
-        pcmk__ipc_send_ack(c, id, flags, "nack", NULL, CRM_EX_PROTOCOL);
+        pcmk__ipc_send_ack(c, id, flags, PCMK__XE_NACK, NULL, CRM_EX_PROTOCOL);
         return 0;
     }
 
 
-    op = crm_element_value(request, F_CRM_TASK);
+    op = crm_element_value(request, PCMK__XA_CRM_TASK);
     if(pcmk__str_eq(op, CRM_OP_RM_NODE_CACHE, pcmk__str_casei)) {
-        crm_xml_add(request, F_TYPE, T_STONITH_NG);
-        crm_xml_add(request, F_STONITH_OPERATION, op);
-        crm_xml_add(request, F_STONITH_CLIENTID, c->id);
-        crm_xml_add(request, F_STONITH_CLIENTNAME, pcmk__client_name(c));
-        crm_xml_add(request, F_STONITH_CLIENTNODE, stonith_our_uname);
+        crm_xml_add(request, PCMK__XA_T, PCMK__VALUE_STONITH_NG);
+        crm_xml_add(request, PCMK__XA_ST_OP, op);
+        crm_xml_add(request, PCMK__XA_ST_CLIENTID, c->id);
+        crm_xml_add(request, PCMK__XA_ST_CLIENTNAME, pcmk__client_name(c));
+        crm_xml_add(request, PCMK__XA_ST_CLIENTNODE, stonith_our_uname);
 
-        send_cluster_message(NULL, crm_msg_stonith_ng, request, FALSE);
+        pcmk__cluster_send_message(NULL, crm_msg_stonith_ng, request);
         free_xml(request);
         return 0;
     }
 
     if (c->name == NULL) {
-        const char *value = crm_element_value(request, F_STONITH_CLIENTNAME);
+        const char *value = crm_element_value(request, PCMK__XA_ST_CLIENTNAME);
 
-        if (value == NULL) {
-            value = "unknown";
-        }
-        c->name = crm_strdup_printf("%s.%u", value, c->pid);
+        c->name = crm_strdup_printf("%s.%u", pcmk__s(value, "unknown"), c->pid);
     }
 
-    crm_element_value_int(request, F_STONITH_CALLOPTS, &call_options);
+    crm_element_value_int(request, PCMK__XA_ST_CALLOPT, &call_options);
     crm_trace("Flags %#08" PRIx32 "/%#08x for command %" PRIu32
               " from client %s", flags, call_options, id, pcmk__client_name(c));
 
@@ -139,9 +135,9 @@ st_ipc_dispatch(qb_ipcs_connection_t * qbc, void *data, size_t size)
         c->request_id = id;     /* Reply only to the last one */
     }
 
-    crm_xml_add(request, F_STONITH_CLIENTID, c->id);
-    crm_xml_add(request, F_STONITH_CLIENTNAME, pcmk__client_name(c));
-    crm_xml_add(request, F_STONITH_CLIENTNODE, stonith_our_uname);
+    crm_xml_add(request, PCMK__XA_ST_CLIENTID, c->id);
+    crm_xml_add(request, PCMK__XA_ST_CLIENTNAME, pcmk__client_name(c));
+    crm_xml_add(request, PCMK__XA_ST_CLIENTNODE, stonith_our_uname);
 
     crm_log_xml_trace(request, "ipc-received");
     stonith_command(c, id, flags, request, NULL);
@@ -177,10 +173,10 @@ st_ipc_destroy(qb_ipcs_connection_t * c)
 static void
 stonith_peer_callback(xmlNode * msg, void *private_data)
 {
-    const char *remote_peer = crm_element_value(msg, F_ORIG);
-    const char *op = crm_element_value(msg, F_STONITH_OPERATION);
+    const char *remote_peer = crm_element_value(msg, PCMK__XA_SRC);
+    const char *op = crm_element_value(msg, PCMK__XA_ST_OP);
 
-    if (pcmk__str_eq(op, "poke", pcmk__str_none)) {
+    if (pcmk__str_eq(op, STONITH_OP_POKE, pcmk__str_none)) {
         return;
     }
 
@@ -197,20 +193,19 @@ stonith_peer_ais_callback(cpg_handle_t handle,
     uint32_t kind = 0;
     xmlNode *xml = NULL;
     const char *from = NULL;
-    char *data = pcmk_message_common_cs(handle, nodeid, pid, msg, &kind, &from);
+    char *data = pcmk__cpg_message_data(handle, nodeid, pid, msg, &kind, &from);
 
     if(data == NULL) {
         return;
     }
     if (kind == crm_class_cluster) {
-        xml = string2xml(data);
+        xml = pcmk__xml_parse(data);
         if (xml == NULL) {
             crm_err("Invalid XML: '%.120s'", data);
             free(data);
             return;
         }
-        crm_xml_add(xml, F_ORIG, from);
-        /* crm_xml_add_int(xml, F_SEQ, wrapper->id); */
+        crm_xml_add(xml, PCMK__XA_SRC, from);
         stonith_peer_callback(xml, NULL);
     }
 
@@ -257,7 +252,7 @@ do_local_reply(const xmlNode *notify_src, pcmk__client_t *client,
 uint64_t
 get_stonith_flag(const char *name)
 {
-    if (pcmk__str_eq(name, T_STONITH_NOTIFY_FENCE, pcmk__str_casei)) {
+    if (pcmk__str_eq(name, PCMK__VALUE_ST_NOTIFY_FENCE, pcmk__str_none)) {
         return st_callback_notify_fence;
 
     } else if (pcmk__str_eq(name, STONITH_OP_DEVICE_ADD, pcmk__str_casei)) {
@@ -266,10 +261,12 @@ get_stonith_flag(const char *name)
     } else if (pcmk__str_eq(name, STONITH_OP_DEVICE_DEL, pcmk__str_casei)) {
         return st_callback_device_del;
 
-    } else if (pcmk__str_eq(name, T_STONITH_NOTIFY_HISTORY, pcmk__str_casei)) {
+    } else if (pcmk__str_eq(name, PCMK__VALUE_ST_NOTIFY_HISTORY,
+                            pcmk__str_none)) {
         return st_callback_notify_history;
 
-    } else if (pcmk__str_eq(name, T_STONITH_NOTIFY_HISTORY_SYNCED, pcmk__str_casei)) {
+    } else if (pcmk__str_eq(name, PCMK__VALUE_ST_NOTIFY_HISTORY_SYNCED,
+                            pcmk__str_none)) {
         return st_callback_notify_history_synced;
 
     }
@@ -287,7 +284,7 @@ stonith_notify_client(gpointer key, gpointer value, gpointer user_data)
     CRM_CHECK(client != NULL, return);
     CRM_CHECK(update_msg != NULL, return);
 
-    type = crm_element_value(update_msg, F_SUBTYPE);
+    type = crm_element_value(update_msg, PCMK__XA_SUBT);
     CRM_CHECK(type != NULL, crm_log_xml_err(update_msg, "notify"); return);
 
     if (client->ipcs == NULL) {
@@ -325,10 +322,10 @@ do_stonith_async_timeout_update(const char *client_id, const char *call_id, int
         return;
     }
 
-    notify_data = create_xml_node(NULL, T_STONITH_TIMEOUT_VALUE);
-    crm_xml_add(notify_data, F_TYPE, T_STONITH_TIMEOUT_VALUE);
-    crm_xml_add(notify_data, F_STONITH_CALLID, call_id);
-    crm_xml_add_int(notify_data, F_STONITH_TIMEOUT, timeout);
+    notify_data = pcmk__xe_create(NULL, PCMK__XE_ST_ASYNC_TIMEOUT_VALUE);
+    crm_xml_add(notify_data, PCMK__XA_T, PCMK__VALUE_ST_ASYNC_TIMEOUT_VALUE);
+    crm_xml_add(notify_data, PCMK__XA_ST_CALLID, call_id);
+    crm_xml_add_int(notify_data, PCMK__XA_ST_TIMEOUT, timeout);
 
     crm_trace("timeout update is %d for client %s and call id %s", timeout, client_id, call_id);
 
@@ -352,17 +349,19 @@ fenced_send_notification(const char *type, const pcmk__action_result_t *result,
                          xmlNode *data)
 {
     /* TODO: Standardize the contents of data */
-    xmlNode *update_msg = create_xml_node(NULL, "notify");
+    xmlNode *update_msg = pcmk__xe_create(NULL, PCMK__XE_NOTIFY);
 
     CRM_LOG_ASSERT(type != NULL);
 
-    crm_xml_add(update_msg, F_TYPE, T_STONITH_NOTIFY);
-    crm_xml_add(update_msg, F_SUBTYPE, type);
-    crm_xml_add(update_msg, F_STONITH_OPERATION, type);
+    crm_xml_add(update_msg, PCMK__XA_T, PCMK__VALUE_ST_NOTIFY);
+    crm_xml_add(update_msg, PCMK__XA_SUBT, type);
+    crm_xml_add(update_msg, PCMK__XA_ST_OP, type);
     stonith__xe_set_result(update_msg, result);
 
     if (data != NULL) {
-        add_message_xml(update_msg, F_STONITH_CALLDATA, data);
+        xmlNode *wrapper = pcmk__xe_create(update_msg, PCMK__XE_ST_CALLDATA);
+
+        pcmk__xml_copy(wrapper, data);
     }
 
     crm_trace("Notifying clients");
@@ -375,60 +374,25 @@ fenced_send_notification(const char *type, const pcmk__action_result_t *result,
  * \internal
  * \brief Send notifications for a configuration change to subscribed clients
  *
- * \param[in] op      Notification type (STONITH_OP_DEVICE_ADD,
- *                    STONITH_OP_DEVICE_DEL, STONITH_OP_LEVEL_ADD, or
- *                    STONITH_OP_LEVEL_DEL)
- * \param[in] result  Operation result
- * \param[in] desc    Description of what changed
- * \param[in] active  Current number of devices or topologies in use
- */
-static void
-send_config_notification(const char *op, const pcmk__action_result_t *result,
-                         const char *desc, int active)
-{
-    xmlNode *notify_data = create_xml_node(NULL, op);
-
-    CRM_CHECK(notify_data != NULL, return);
-
-    crm_xml_add(notify_data, F_STONITH_DEVICE, desc);
-    crm_xml_add_int(notify_data, F_STONITH_ACTIVE, active);
-
-    fenced_send_notification(op, result, notify_data);
-    free_xml(notify_data);
-}
-
-/*!
- * \internal
- * \brief Send notifications for a device change to subscribed clients
- *
- * \param[in] op      Notification type (STONITH_OP_DEVICE_ADD or
- *                    STONITH_OP_DEVICE_DEL)
+ * \param[in] op      Notification type (\c STONITH_OP_DEVICE_ADD,
+ *                    \c STONITH_OP_DEVICE_DEL, \c STONITH_OP_LEVEL_ADD, or
+ *                    \c STONITH_OP_LEVEL_DEL)
  * \param[in] result  Operation result
- * \param[in] desc    ID of device that changed
+ * \param[in] desc    Description of what changed (either device ID or string
+ *                    representation of level
+ *                    (<tt><target>[<level_index>]</tt>))
  */
 void
-fenced_send_device_notification(const char *op,
+fenced_send_config_notification(const char *op,
                                 const pcmk__action_result_t *result,
                                 const char *desc)
 {
-    send_config_notification(op, result, desc, g_hash_table_size(device_list));
-}
+    xmlNode *notify_data = pcmk__xe_create(NULL, op);
 
-/*!
- * \internal
- * \brief Send notifications for a topology level change to subscribed clients
- *
- * \param[in] op      Notification type (STONITH_OP_LEVEL_ADD or
- *                    STONITH_OP_LEVEL_DEL)
- * \param[in] result  Operation result
- * \param[in] desc    String representation of level (<target>[<level_index>])
- */
-void
-fenced_send_level_notification(const char *op,
-                               const pcmk__action_result_t *result,
-                               const char *desc)
-{
-    send_config_notification(op, result, desc, g_hash_table_size(topology));
+    crm_xml_add(notify_data, PCMK__XA_ST_DEVICE_ID, desc);
+
+    fenced_send_notification(op, result, notify_data);
+    free_xml(notify_data);
 }
 
 /*!
@@ -466,7 +430,7 @@ stonith_cleanup(void)
         qb_ipcs_destroy(ipcs);
     }
 
-    crm_peer_destroy();
+    pcmk__cluster_destroy_node_caches();
     pcmk__client_cleanup();
     free_stonith_remote_op_list();
     free_topology_list();
@@ -512,221 +476,34 @@ st_peer_update_callback(enum crm_status_type type, crm_node_t * node, const void
          * This is a hack until we can send to a nodeid and/or we fix node name lookups
          * These messages are ignored in stonith_peer_callback()
          */
-        xmlNode *query = create_xml_node(NULL, "stonith_command");
+        xmlNode *query = pcmk__xe_create(NULL, PCMK__XE_STONITH_COMMAND);
 
-        crm_xml_add(query, F_XML_TAGNAME, "stonith_command");
-        crm_xml_add(query, F_TYPE, T_STONITH_NG);
-        crm_xml_add(query, F_STONITH_OPERATION, "poke");
+        crm_xml_add(query, PCMK__XA_T, PCMK__VALUE_STONITH_NG);
+        crm_xml_add(query, PCMK__XA_ST_OP, STONITH_OP_POKE);
 
         crm_debug("Broadcasting our uname because of node %u", node->id);
-        send_cluster_message(NULL, crm_msg_stonith_ng, query, FALSE);
+        pcmk__cluster_send_message(NULL, crm_msg_stonith_ng, query);
 
         free_xml(query);
     }
 }
 
-static pcmk__cluster_option_t fencer_options[] = {
-    /* name, old name, type, allowed values,
-     * default value, validator,
-     * short description,
-     * long description
-     */
-    {
-        PCMK_STONITH_HOST_ARGUMENT, NULL, "string", NULL, "port", NULL,
-        N_("Advanced use only: An alternate parameter to supply instead of 'port'"),
-        N_("some devices do not support the "
-           "standard 'port' parameter or may provide additional ones. Use "
-           "this to specify an alternate, device-specific, parameter "
-           "that should indicate the machine to be fenced. A value of "
-           "none can be used to tell the cluster not to supply any "
-           "additional parameters.")
-    },
-    {
-        PCMK_STONITH_HOST_MAP,NULL, "string", NULL, "", NULL,
-        N_("A mapping of host names to ports numbers for devices that do not support host names."),
-        N_("Eg. node1:1;node2:2,3 would tell the cluster to use port 1 for node1 and ports 2 and 3 for node2")
-    },
-    {
-        PCMK_STONITH_HOST_LIST,NULL, "string", NULL, "", NULL,
-        N_("Eg. node1,node2,node3"),
-        N_("A list of machines controlled by "
-               "this device (Optional unless pcmk_host_list=static-list)")
-    },
-    {
-        PCMK_STONITH_HOST_CHECK,NULL, "string", NULL, "dynamic-list", NULL,
-        N_("How to determine which machines are controlled by the device."),
-        N_("Allowed values: dynamic-list "
-               "(query the device via the 'list' command), static-list "
-               "(check the pcmk_host_list attribute), status "
-               "(query the device via the 'status' command), "
-               "none (assume every device can fence every "
-               "machine)")
-    },
-    {
-        PCMK_STONITH_DELAY_MAX,NULL, "time", NULL, "0s", NULL,
-        N_("Enable a base delay for fencing actions and specify base delay value."),
-        N_("Enable a delay of no more than the "
-               "time specified before executing fencing actions. Pacemaker "
-               "derives the overall delay by taking the value of "
-               "pcmk_delay_base and adding a random delay value such "
-               "that the sum is kept below this maximum.")
-    },
-    {
-        PCMK_STONITH_DELAY_BASE,NULL, "string", NULL, "0s", NULL,
-        N_("Enable a base delay for "
-               "fencing actions and specify base delay value."),
-        N_("This enables a static delay for "
-               "fencing actions, which can help avoid \"death matches\" where "
-               "two nodes try to fence each other at the same time. If "
-               "pcmk_delay_max  is also used, a random delay will be "
-               "added such that the total delay is kept below that value."
-               "This can be set to a single time value to apply to any node "
-               "targeted by this device (useful if a separate device is "
-               "configured for each target), or to a node map (for example, "
-               "\"node1:1s;node2:5\") to set a different value per target.")
-    },
-    {
-        PCMK_STONITH_ACTION_LIMIT,NULL, "integer", NULL, "1", NULL,
-        N_("The maximum number of actions can be performed in parallel on this device"),
-        N_("Cluster property concurrent-fencing=true needs to be configured first."
-             "Then use this to specify the maximum number of actions can be performed in parallel on this device. -1 is unlimited.")
-    },
-    {
-        "pcmk_reboot_action", NULL, "string", NULL,
-        PCMK_ACTION_REBOOT, NULL,
-        N_("Advanced use only: An alternate command to run instead of 'reboot'"),
-        N_("Some devices do not support the standard commands or may provide additional ones.\n"
-           "Use this to specify an alternate, device-specific, command that implements the \'reboot\' action.")
-    },
-    {
-	"pcmk_reboot_timeout",NULL, "time", NULL, "60s", NULL,
-	N_("Advanced use only: Specify an alternate timeout to use for reboot actions instead of stonith-timeout"),
-        N_("Some devices need much more/less time to complete than normal."
-	   "Use this to specify an alternate, device-specific, timeout for \'reboot\' actions.")
-    },
-    {
-	"pcmk_reboot_retries",NULL, "integer", NULL, "2", NULL,
-	N_("Advanced use only: The maximum number of times to retry the 'reboot' command within the timeout period"),
-        N_("Some devices do not support multiple connections."
-           " Operations may 'fail' if the device is busy with another task so Pacemaker will automatically retry the operation,      if there is time remaining."
-           " Use this option to alter the number of times Pacemaker retries \'reboot\' actions before giving up.")
-    },
-    {
-        "pcmk_off_action", NULL, "string", NULL,
-        PCMK_ACTION_OFF, NULL,
-        N_("Advanced use only: An alternate command to run instead of \'off\'"),
-        N_("Some devices do not support the standard commands or may provide additional ones."
-           "Use this to specify an alternate, device-specific, command that implements the \'off\' action.")
-    },
-    {
-	"pcmk_off_timeout",NULL, "time", NULL, "60s", NULL,
-	N_("Advanced use only: Specify an alternate timeout to use for off actions instead of stonith-timeout"),
-        N_("Some devices need much more/less time to complete than normal."
-	   "Use this to specify an alternate, device-specific, timeout for \'off\' actions.")
-    },
-    {
-	"pcmk_off_retries",NULL, "integer", NULL, "2", NULL,
-	N_("Advanced use only: The maximum number of times to retry the 'off' command within the timeout period"),
-        N_("Some devices do not support multiple connections."
-           " Operations may 'fail' if the device is busy with another task so Pacemaker will automatically retry the operation,      if there is time remaining."
-           " Use this option to alter the number of times Pacemaker retries \'off\' actions before giving up.")
-    },
-    {
-        "pcmk_on_action", NULL, "string", NULL,
-        PCMK_ACTION_ON, NULL,
-        N_("Advanced use only: An alternate command to run instead of 'on'"),
-        N_("Some devices do not support the standard commands or may provide additional ones."
-           "Use this to specify an alternate, device-specific, command that implements the \'on\' action.")
-    },
-    {
-	"pcmk_on_timeout",NULL, "time", NULL, "60s", NULL,
-	N_("Advanced use only: Specify an alternate timeout to use for on actions instead of stonith-timeout"),
-        N_("Some devices need much more/less time to complete than normal."
-	   "Use this to specify an alternate, device-specific, timeout for \'on\' actions.")
-    },
-    {
-	"pcmk_on_retries",NULL, "integer", NULL, "2", NULL,
-	N_("Advanced use only: The maximum number of times to retry the 'on' command within the timeout period"),
-        N_("Some devices do not support multiple connections."
-           " Operations may 'fail' if the device is busy with another task so Pacemaker will automatically retry the operation,      if there is time remaining."
-           " Use this option to alter the number of times Pacemaker retries \'on\' actions before giving up.")
-    },
-    {
-        "pcmk_list_action",NULL, "string", NULL,
-        PCMK_ACTION_LIST, NULL,
-        N_("Advanced use only: An alternate command to run instead of \'list\'"),
-        N_("Some devices do not support the standard commands or may provide additional ones."
-           "Use this to specify an alternate, device-specific, command that implements the \'list\' action.")
-    },
-    {
-	"pcmk_list_timeout",NULL, "time", NULL, "60s", NULL,
-	N_("Advanced use only: Specify an alternate timeout to use for list actions instead of stonith-timeout"),
-        N_("Some devices need much more/less time to complete than normal."
-	   "Use this to specify an alternate, device-specific, timeout for \'list\' actions.")
-    },
-    {
-	"pcmk_list_retries",NULL, "integer", NULL, "2", NULL,
-	N_("Advanced use only: The maximum number of times to retry the \'list\' command within the timeout period"),
-        N_("Some devices do not support multiple connections."
-           " Operations may 'fail' if the device is busy with another task so Pacemaker will automatically retry the operation,      if there is time remaining."
-           " Use this option to alter the number of times Pacemaker retries \'list\' actions before giving up.")
-    },
-    {
-        "pcmk_monitor_action", NULL, "string", NULL,
-        PCMK_ACTION_MONITOR, NULL,
-	N_("Advanced use only: An alternate command to run instead of \'monitor\'"),
-        N_("Some devices do not support the standard commands or may provide additional ones."
-                 "Use this to specify an alternate, device-specific, command that implements the \'monitor\' action.")
-    },
-    {
-	"pcmk_monitor_timeout",NULL, "time", NULL, "60s", NULL,
-	N_("Advanced use only: Specify an alternate timeout to use for monitor actions instead of stonith-timeout"),
-        N_("Some devices need much more/less time to complete than normal.\n"
-	   "Use this to specify an alternate, device-specific, timeout for \'monitor\' actions.")
-    },
-    {
-	"pcmk_monitor_retries",NULL, "integer", NULL, "2", NULL,
-	N_("Advanced use only: The maximum number of times to retry the \'monitor\' command within the timeout period"),
-        N_("Some devices do not support multiple connections."
-           " Operations may 'fail' if the device is busy with another task so Pacemaker will automatically retry the operation,      if there is time remaining."
-           " Use this option to alter the number of times Pacemaker retries \'monitor\' actions before giving up.")
-    },
-    {
-        "pcmk_status_action", NULL, "string", NULL,
-        PCMK_ACTION_STATUS, NULL,
-        N_("Advanced use only: An alternate command to run instead of \'status\'"),
-        N_("Some devices do not support the standard commands or may provide additional ones."
-           "Use this to specify an alternate, device-specific, command that implements the \'status\' action.")
-    },
-    {
-	"pcmk_status_timeout",NULL, "time", NULL, "60s", NULL,
-	N_("Advanced use only: Specify an alternate timeout to use for status actions instead of stonith-timeout"),
-        N_("Some devices need much more/less time to complete than normal."
-	   "Use this to specify an alternate, device-specific, timeout for \'status\' actions.")
-    },
-    {
-	"pcmk_status_retries",NULL, "integer", NULL, "2", NULL,
-	N_("Advanced use only: The maximum number of times to retry the \'status\' command within the timeout period"),
-        N_("Some devices do not support multiple connections."
-           " Operations may 'fail' if the device is busy with another task so Pacemaker will automatically retry the operation,      if there is time remaining."
-           " Use this option to alter the number of times Pacemaker retries \'status\' actions before giving up.")
-    },
-};
-
-void
+/* @COMPAT Deprecated since 2.1.8. Use pcmk_list_fence_attrs() or
+ * crm_resource --list-options=fencing instead of querying daemon metadata.
+ */
+static int
 fencer_metadata(void)
 {
+    const char *name = "pacemaker-fenced";
     const char *desc_short = N_("Instance attributes available for all "
-                             "\"stonith\"-class resources");
-    const char *desc_long = N_("Instance attributes available for all \"stonith\"-"
-                            "class resources and used by Pacemaker's fence "
-                            "daemon, formerly known as stonithd");
-
-    gchar *s = pcmk__format_option_metadata("pacemaker-fenced", desc_short,
-                                            desc_long, fencer_options,
-                                            PCMK__NELEM(fencer_options));
-    printf("%s", s);
-    g_free(s);
+                                "\"stonith\"-class resources");
+    const char *desc_long = N_("Instance attributes available for all "
+                               "\"stonith\"-class resources and used by "
+                               "Pacemaker's fence daemon, formerly known as "
+                               "stonithd");
+
+    return pcmk__daemon_metadata(out, name, desc_short, desc_long,
+                                 pcmk__opt_fencing);
 }
 
 static GOptionEntry entries[] = {
@@ -747,8 +524,7 @@ build_arg_context(pcmk__common_args_t *args, GOptionGroup **group)
 {
     GOptionContext *context = NULL;
 
-    context = pcmk__build_arg_context(args, "text (default), xml", group,
-                                      "[metadata]");
+    context = pcmk__build_arg_context(args, "text (default), xml", group, NULL);
     pcmk__add_main_args(context, entries);
     return context;
 }
@@ -757,7 +533,7 @@ int
 main(int argc, char **argv)
 {
     int rc = pcmk_rc_ok;
-    crm_cluster_t *cluster = NULL;
+    pcmk_cluster_t *cluster = NULL;
     crm_ipc_t *old_instance = NULL;
 
     GError *error = NULL;
@@ -791,7 +567,13 @@ main(int argc, char **argv)
 
     if ((g_strv_length(processed_args) >= 2)
         && pcmk__str_eq(processed_args[1], "metadata", pcmk__str_none)) {
-        fencer_metadata();
+
+        rc = fencer_metadata();
+        if (rc != pcmk_rc_ok) {
+            exit_code = CRM_EX_FATAL;
+            g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
+                        "Unable to display metadata: %s", pcmk_rc_str(rc));
+        }
         goto done;
     }
 
@@ -826,7 +608,7 @@ main(int argc, char **argv)
 
     mainloop_add_signal(SIGTERM, stonith_shutdown);
 
-    crm_peer_init();
+    pcmk__cluster_init_node_caches();
 
     rc = fenced_scheduler_init();
     if (rc != pcmk_rc_ok) {
@@ -840,16 +622,16 @@ main(int argc, char **argv)
 
     if (!stand_alone) {
 #if SUPPORT_COROSYNC
-        if (is_corosync_cluster()) {
-            cluster->destroy = stonith_peer_cs_destroy;
-            cluster->cpg.cpg_deliver_fn = stonith_peer_ais_callback;
-            cluster->cpg.cpg_confchg_fn = pcmk_cpg_membership;
+        if (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync) {
+            pcmk_cluster_set_destroy_fn(cluster, stonith_peer_cs_destroy);
+            pcmk_cpg_set_deliver_fn(cluster, stonith_peer_ais_callback);
+            pcmk_cpg_set_confchg_fn(cluster, pcmk__cpg_confchg_cb);
         }
 #endif // SUPPORT_COROSYNC
 
-        crm_set_status_callback(&st_peer_update_callback);
+        pcmk__cluster_set_status_callback(&st_peer_update_callback);
 
-        if (crm_cluster_connect(cluster) == FALSE) {
+        if (pcmk_cluster_connect(cluster) != pcmk_rc_ok) {
             exit_code = CRM_EX_FATAL;
             crm_crit("Cannot sign in to the cluster... terminating");
             goto done;
diff --git a/daemons/fenced/pacemaker-fenced.h b/daemons/fenced/pacemaker-fenced.h
index 220978a..2d8047c 100644
--- a/daemons/fenced/pacemaker-fenced.h
+++ b/daemons/fenced/pacemaker-fenced.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2023 the Pacemaker project contributors
+ * Copyright 2009-2024 the Pacemaker project contributors
  *
  * This source code is licensed under the GNU General Public License version 2
  * or later (GPLv2+) WITHOUT ANY WARRANTY.
@@ -111,8 +111,8 @@ typedef struct remote_fencing_op_s {
 
     /*!
      * Fencing delay (in seconds) requested by API client (used by controller to
-     * implement priority-fencing-delay). A value of -1 means disable all
-     * configured delays.
+     * implement \c PCMK_OPT_PRIORITY_FENCING_DELAY). A value of -1 means
+     * disable all configured delays.
      */
     int client_delay;
 
@@ -253,12 +253,9 @@ void
 void fenced_send_notification(const char *type,
                               const pcmk__action_result_t *result,
                               xmlNode *data);
-void fenced_send_device_notification(const char *op,
+void fenced_send_config_notification(const char *op,
                                      const pcmk__action_result_t *result,
                                      const char *desc);
-void fenced_send_level_notification(const char *op,
-                                    const pcmk__action_result_t *result,
-                                    const char *desc);
 
 remote_fencing_op_t *initiate_remote_stonith_op(const pcmk__client_t *client,
                                                 xmlNode *request,
@@ -281,7 +278,6 @@ void set_fencing_completed(remote_fencing_op_t * op);
 
 int fenced_handle_manual_confirmation(const pcmk__client_t *client,
                                       xmlNode *msg);
-void fencer_metadata(void);
 
 const char *fenced_device_reboot_action(const char *device_id);
 bool fenced_device_supports_on(const char *device_id);
@@ -327,7 +323,7 @@ extern char *stonith_our_uname;
 extern gboolean stand_alone;
 extern GHashTable *device_list;
 extern GHashTable *topology;
-extern long stonith_watchdog_timeout_ms;
+extern long long stonith_watchdog_timeout_ms;
 extern GList *stonith_watchdog_targets;
 extern GHashTable *stonith_remote_op_list;
 extern crm_exit_t exit_code;
diff --git a/daemons/pacemakerd/Makefile.am b/daemons/pacemakerd/Makefile.am
index 78e7c37..7571a6c 100644
--- a/daemons/pacemakerd/Makefile.am
+++ b/daemons/pacemakerd/Makefile.am
@@ -20,7 +20,8 @@ EXTRA_DIST 	= pacemakerd.8.inc
 
 ## SOURCES
 
-noinst_HEADERS		= pacemakerd.h
+noinst_HEADERS		= pacemakerd.h \
+			  pcmkd_corosync.h
 
 pacemakerd_CFLAGS	= $(CFLAGS_HARDENED_EXE)
 pacemakerd_LDFLAGS	= $(LDFLAGS_HARDENED_EXE)
diff --git a/daemons/pacemakerd/pacemakerd.c b/daemons/pacemakerd/pacemakerd.c
index 365b743..5d5a1db 100644
--- a/daemons/pacemakerd/pacemakerd.c
+++ b/daemons/pacemakerd/pacemakerd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2023 the Pacemaker project contributors
+ * Copyright 2010-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -10,6 +10,10 @@
 #include <crm_internal.h>
 #include "pacemakerd.h"
 
+#if SUPPORT_COROSYNC
+#include "pcmkd_corosync.h"
+#endif
+
 #include <pwd.h>
 #include <errno.h>
 #include <unistd.h>
@@ -21,8 +25,8 @@
 #include <sys/resource.h>
 
 #include <crm/crm.h>  /* indirectly: CRM_EX_* */
-#include <crm/msg_xml.h>
 #include <crm/common/mainloop.h>
+#include <crm/common/xml.h>
 #include <crm/common/cmdline_internal.h>
 #include <crm/common/ipc_pacemakerd.h>
 #include <crm/common/output_internal.h>
@@ -60,19 +64,21 @@ static int
 pacemakerd_features_xml(pcmk__output_t *out, va_list args) {
     gchar **feature_list = g_strsplit(CRM_FEATURES, " ", 0);
 
-    pcmk__output_xml_create_parent(out, "pacemakerd",
-                                   "version", PACEMAKER_VERSION,
-                                   "build", BUILD_VERSION,
-                                   "feature_set", CRM_FEATURE_SET,
+    pcmk__output_xml_create_parent(out, PCMK_XE_PACEMAKERD,
+                                   PCMK_XA_VERSION, PACEMAKER_VERSION,
+                                   PCMK_XA_BUILD, BUILD_VERSION,
+                                   PCMK_XA_FEATURE_SET, CRM_FEATURE_SET,
                                    NULL);
-    out->begin_list(out, NULL, NULL, "features");
+    out->begin_list(out, NULL, NULL, PCMK_XE_FEATURES);
 
     for (char **s = feature_list; *s != NULL; s++) {
-        pcmk__output_create_xml_text_node(out, "feature", *s);
+        pcmk__output_create_xml_text_node(out, PCMK_XE_FEATURE, *s);
     }
 
     out->end_list(out);
 
+    pcmk__output_xml_pop_parent(out);
+
     g_strfreev(feature_list);
     return pcmk_rc_ok;
 }
@@ -92,7 +98,7 @@ pid_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **er
 static gboolean
 standby_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **err) {
     options.standby = TRUE;
-    pcmk__set_env_option(PCMK__ENV_NODE_START_STATE, "standby", false);
+    pcmk__set_env_option(PCMK__ENV_NODE_START_STATE, PCMK_VALUE_STANDBY, false);
     return TRUE;
 }
 
@@ -297,8 +303,6 @@ main(int argc, char **argv)
         goto done;
     }
 
-    pcmk__force_args(context, &error, "%s --xml-simple-list", g_get_prgname());
-
     pcmk__register_messages(out, fmt_functions);
 
     if (options.features) {
@@ -313,7 +317,7 @@ main(int argc, char **argv)
     }
 
     // @COMPAT Drop at 3.0.0; likely last used in 1.1.24
-    pcmk__set_env_option(PCMK__ENV_MCP, "true", true);
+    pcmk__set_env_option(PCMK__ENV_MCP, PCMK_VALUE_TRUE, true);
 
     if (options.shutdown) {
         pcmk__cli_init_logging("pacemakerd", args->verbosity);
@@ -402,7 +406,7 @@ main(int argc, char **argv)
     {
         const char *facility = pcmk__env_option(PCMK__ENV_LOGFACILITY);
 
-        if (!pcmk__str_eq(facility, PCMK__VALUE_NONE,
+        if (!pcmk__str_eq(facility, PCMK_VALUE_NONE,
                           pcmk__str_casei|pcmk__str_null_matches)) {
             pcmk__set_env_option("LOGFACILITY", facility, true);
         }
@@ -444,7 +448,7 @@ main(int argc, char **argv)
 
     if ((running_with_sbd) && pcmk__get_sbd_sync_resource_startup()) {
         crm_notice("Waiting for startup-trigger from SBD.");
-        pacemakerd_state = XML_PING_ATTR_PACEMAKERDSTATE_WAITPING;
+        pacemakerd_state = PCMK__VALUE_WAIT_FOR_PING;
         startup_trigger = mainloop_add_trigger(G_PRIORITY_HIGH, init_children_processes, NULL);
     } else {
         if (running_with_sbd) {
@@ -452,7 +456,7 @@ main(int argc, char **argv)
                      "by your SBD version) improve reliability of "
                      "interworking between SBD & pacemaker.");
         }
-        pacemakerd_state = XML_PING_ATTR_PACEMAKERDSTATE_STARTINGDAEMONS;
+        pacemakerd_state = PCMK__VALUE_STARTING_DAEMONS;
         init_children_processes(NULL);
     }
 
diff --git a/daemons/pacemakerd/pacemakerd.h b/daemons/pacemakerd/pacemakerd.h
index ee6facf..51e32b1 100644
--- a/daemons/pacemakerd/pacemakerd.h
+++ b/daemons/pacemakerd/pacemakerd.h
@@ -9,27 +9,19 @@
 
 #include <crm_internal.h>
 
-#include <stdint.h>
-
 #define MAX_RESPAWN		100
 
 extern GMainLoop *mainloop;
 extern struct qb_ipcs_service_handlers pacemakerd_ipc_callbacks;
 extern const char *pacemakerd_state;
 extern gboolean running_with_sbd;
-extern unsigned int shutdown_complete_state_reported_to;
 extern gboolean shutdown_complete_state_reported_client_closed;
+extern unsigned int shutdown_complete_state_reported_to;
 extern crm_trigger_t *shutdown_trigger;
 extern crm_trigger_t *startup_trigger;
 extern time_t subdaemon_check_progress;
 
-gboolean pacemakerd_read_config(void);
-
-gboolean cluster_connect_cfg(void);
-void cluster_disconnect_cfg(void);
 int find_and_track_existing_processes(void);
 gboolean init_children_processes(void *user_data);
-void restart_cluster_subdaemons(void);
 void pcmk_shutdown(int nsig);
-void pcmkd_shutdown_corosync(void);
-bool pcmkd_corosync_connected(void);
+void restart_cluster_subdaemons(void);
diff --git a/daemons/pacemakerd/pcmkd_corosync.c b/daemons/pacemakerd/pcmkd_corosync.c
index 8a1a867..43f6231 100644
--- a/daemons/pacemakerd/pcmkd_corosync.c
+++ b/daemons/pacemakerd/pcmkd_corosync.c
@@ -9,6 +9,7 @@
 
 #include <crm_internal.h>
 #include "pacemakerd.h"
+#include "pcmkd_corosync.h"
 
 #include <sys/utsname.h>
 #include <sys/stat.h>           /* for calls to stat() */
@@ -271,7 +272,8 @@ pacemakerd_read_config(void)
     gid_t found_gid = 0;
     pid_t found_pid = 0;
     int rv;
-    enum cluster_type_e stack;
+    enum pcmk_cluster_layer cluster_layer = pcmk_cluster_layer_unknown;
+    const char *cluster_layer_s = NULL;
 
     // There can be only one possibility
     do {
@@ -318,19 +320,21 @@ pacemakerd_read_config(void)
         return FALSE;
     }
 
-    stack = get_cluster_type();
-    if (stack != pcmk_cluster_corosync) {
+    cluster_layer = pcmk_get_cluster_layer();
+    cluster_layer_s = pcmk_cluster_layer_text(cluster_layer);
+
+    if (cluster_layer != pcmk_cluster_layer_corosync) {
         crm_crit("Expected Corosync cluster layer but detected %s "
-                 CRM_XS " stack=%d", name_for_cluster_type(stack), stack);
+                 CRM_XS " cluster_layer=%d",
+                 cluster_layer_s, cluster_layer);
         return FALSE;
     }
 
-    crm_info("Reading configuration for %s stack",
-             name_for_cluster_type(stack));
-    pcmk__set_env_option(PCMK__ENV_CLUSTER_TYPE, "corosync", true);
+    crm_info("Reading configuration for %s cluster layer", cluster_layer_s);
+    pcmk__set_env_option(PCMK__ENV_CLUSTER_TYPE, PCMK_VALUE_COROSYNC, true);
 
     // @COMPAT Drop at 3.0.0; added unused in 1.1.9
-    pcmk__set_env_option(PCMK__ENV_QUORUM_TYPE, "corosync", true);
+    pcmk__set_env_option(PCMK__ENV_QUORUM_TYPE, PCMK_VALUE_COROSYNC, true);
 
     // If debug logging is not configured, check whether corosync has it
     if (pcmk__env_option(PCMK__ENV_DEBUG) == NULL) {
diff --git a/daemons/pacemakerd/pcmkd_corosync.h b/daemons/pacemakerd/pcmkd_corosync.h
new file mode 100644
index 0000000..8c4a1e1
--- /dev/null
+++ b/daemons/pacemakerd/pcmkd_corosync.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright 2010-2023 the Pacemaker project contributors
+ *
+ * The version control history for this file may have further details.
+ *
+ * This source code is licensed under the GNU General Public License version 2
+ * or later (GPLv2+) WITHOUT ANY WARRANTY.
+ */
+
+#include <crm_internal.h>
+
+gboolean cluster_connect_cfg(void);
+void cluster_disconnect_cfg(void);
+gboolean pacemakerd_read_config(void);
+bool pcmkd_corosync_connected(void);
+void pcmkd_shutdown_corosync(void);
diff --git a/daemons/pacemakerd/pcmkd_messages.c b/daemons/pacemakerd/pcmkd_messages.c
index 4e6f822..9837d5a 100644
--- a/daemons/pacemakerd/pcmkd_messages.c
+++ b/daemons/pacemakerd/pcmkd_messages.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2022 the Pacemaker project contributors
+ * Copyright 2010-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -11,7 +11,7 @@
 #include "pacemakerd.h"
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 
 #include <errno.h>
 #include <stdbool.h>
@@ -30,7 +30,7 @@ handle_node_cache_request(pcmk__request_t *request)
               pcmk__client_name(request->ipc_client));
 
     pcmk__ipc_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags,
-                       "ack", NULL, CRM_EX_OK);
+                       PCMK__XE_ACK, NULL, CRM_EX_OK);
     return NULL;
 }
 
@@ -42,23 +42,24 @@ handle_ping_request(pcmk__request_t *request)
     const char *value = NULL;
     xmlNode *ping = NULL;
     xmlNode *reply = NULL;
-    const char *from = crm_element_value(msg, F_CRM_SYS_FROM);
+    const char *from = crm_element_value(msg, PCMK__XA_CRM_SYS_FROM);
 
     /* Pinged for status */
-    crm_trace("Pinged from " F_CRM_SYS_FROM "='%s' " F_CRM_ORIGIN "='%s'",
+    crm_trace("Pinged from " PCMK__XA_CRM_SYS_FROM "='%s' "
+              PCMK_XA_ORIGIN "='%s'",
               pcmk__s(from, ""),
-              pcmk__s(crm_element_value(msg, F_CRM_ORIGIN), ""));
+              pcmk__s(crm_element_value(msg, PCMK_XA_ORIGIN), ""));
 
     pcmk__ipc_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags,
-                       "ack", NULL, CRM_EX_INDETERMINATE);
+                       PCMK__XE_ACK, NULL, CRM_EX_INDETERMINATE);
 
-    ping = create_xml_node(NULL, XML_CRM_TAG_PING);
-    value = crm_element_value(msg, F_CRM_SYS_TO);
-    crm_xml_add(ping, XML_PING_ATTR_SYSFROM, value);
-    crm_xml_add(ping, XML_PING_ATTR_PACEMAKERDSTATE, pacemakerd_state);
-    crm_xml_add_ll(ping, XML_ATTR_TSTAMP,
+    ping = pcmk__xe_create(NULL, PCMK__XE_PING_RESPONSE);
+    value = crm_element_value(msg, PCMK__XA_CRM_SYS_TO);
+    crm_xml_add(ping, PCMK__XA_CRM_SUBSYSTEM, value);
+    crm_xml_add(ping, PCMK__XA_PACEMAKERD_STATE, pacemakerd_state);
+    crm_xml_add_ll(ping, PCMK_XA_CRM_TIMESTAMP,
                    (long long) subdaemon_check_progress);
-    crm_xml_add(ping, XML_PING_ATTR_STATUS, "ok");
+    crm_xml_add(ping, PCMK_XA_RESULT, "ok");
     reply = create_reply(msg, ping);
 
     free_xml(ping);
@@ -73,16 +74,18 @@ handle_ping_request(pcmk__request_t *request)
 
     /* just proceed state on sbd pinging us */
     if (from && strstr(from, "sbd")) {
-        if (pcmk__str_eq(pacemakerd_state, XML_PING_ATTR_PACEMAKERDSTATE_SHUTDOWNCOMPLETE, pcmk__str_none)) {
+        if (pcmk__str_eq(pacemakerd_state, PCMK__VALUE_SHUTDOWN_COMPLETE,
+                         pcmk__str_none)) {
             if (pcmk__get_sbd_sync_resource_startup()) {
                 crm_notice("Shutdown-complete-state passed to SBD.");
             }
 
             shutdown_complete_state_reported_to = request->ipc_client->pid;
 
-        } else if (pcmk__str_eq(pacemakerd_state, XML_PING_ATTR_PACEMAKERDSTATE_WAITPING, pcmk__str_none)) {
+        } else if (pcmk__str_eq(pacemakerd_state, PCMK__VALUE_WAIT_FOR_PING,
+                                pcmk__str_none)) {
             crm_notice("Received startup-trigger from SBD.");
-            pacemakerd_state = XML_PING_ATTR_PACEMAKERDSTATE_STARTINGDAEMONS;
+            pacemakerd_state = PCMK__VALUE_STARTING_DAEMONS;
             mainloop_set_trigger(startup_trigger);
         }
     }
@@ -105,19 +108,19 @@ handle_shutdown_request(pcmk__request_t *request)
     bool allowed = pcmk_is_set(request->ipc_client->flags, pcmk__client_privileged);
 
     pcmk__ipc_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags,
-                       "ack", NULL, CRM_EX_INDETERMINATE);
+                       PCMK__XE_ACK, NULL, CRM_EX_INDETERMINATE);
 
-    shutdown = create_xml_node(NULL, XML_CIB_ATTR_SHUTDOWN);
+    shutdown = pcmk__xe_create(NULL, PCMK__XE_SHUTDOWN);
 
     if (allowed) {
         crm_notice("Shutting down in response to IPC request %s from %s",
-                   crm_element_value(msg, F_CRM_REFERENCE),
-                   crm_element_value(msg, F_CRM_ORIGIN));
-        crm_xml_add_int(shutdown, XML_LRM_ATTR_OPSTATUS, CRM_EX_OK);
+                   crm_element_value(msg, PCMK_XA_REFERENCE),
+                   crm_element_value(msg, PCMK_XA_ORIGIN));
+        crm_xml_add_int(shutdown, PCMK__XA_OP_STATUS, CRM_EX_OK);
     } else {
         crm_warn("Ignoring shutdown request from unprivileged client %s",
                  pcmk__client_name(request->ipc_client));
-        crm_xml_add_int(shutdown, XML_LRM_ATTR_OPSTATUS, CRM_EX_INSUFFICIENT_PRIV);
+        crm_xml_add_int(shutdown, PCMK__XA_OP_STATUS, CRM_EX_INSUFFICIENT_PRIV);
     }
 
     reply = create_reply(msg, shutdown);
@@ -142,7 +145,7 @@ static xmlNode *
 handle_unknown_request(pcmk__request_t *request)
 {
     pcmk__ipc_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags,
-                       "ack", NULL, CRM_EX_INVALID_PARAM);
+                       PCMK__XE_ACK, NULL, CRM_EX_INVALID_PARAM);
 
     pcmk__format_result(&request->result, CRM_EX_PROTOCOL, PCMK_EXEC_INVALID,
                         "Unknown IPC request type '%s' (bug?)",
@@ -168,7 +171,7 @@ pcmk_ipc_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
 {
     crm_trace("Connection %p", c);
     if (pcmk__new_client(c, uid, gid) == NULL) {
-        return -EIO;
+        return -ENOMEM;
     }
     return 0;
 }
@@ -217,7 +220,7 @@ pcmk_ipc_dispatch(qb_ipcs_connection_t * qbc, void *data, size_t size)
 
     msg = pcmk__client_data2xml(c, data, &id, &flags);
     if (msg == NULL) {
-        pcmk__ipc_send_ack(c, id, flags, "ack", NULL, CRM_EX_PROTOCOL);
+        pcmk__ipc_send_ack(c, id, flags, PCMK__XE_ACK, NULL, CRM_EX_PROTOCOL);
         return 0;
 
     } else {
@@ -235,7 +238,7 @@ pcmk_ipc_dispatch(qb_ipcs_connection_t * qbc, void *data, size_t size)
             .result         = PCMK__UNKNOWN_RESULT,
         };
 
-        request.op = crm_element_value_copy(request.xml, F_CRM_TASK);
+        request.op = crm_element_value_copy(request.xml, PCMK__XA_CRM_TASK);
         CRM_CHECK(request.op != NULL, return 0);
 
         reply = pcmk__process_request(&request, pcmkd_handlers);
diff --git a/daemons/pacemakerd/pcmkd_subdaemons.c b/daemons/pacemakerd/pcmkd_subdaemons.c
index 21e432e..5bd3512 100644
--- a/daemons/pacemakerd/pcmkd_subdaemons.c
+++ b/daemons/pacemakerd/pcmkd_subdaemons.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2023 the Pacemaker project contributors
+ * Copyright 2010-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -10,6 +10,10 @@
 #include <crm_internal.h>
 #include "pacemakerd.h"
 
+#if SUPPORT_COROSYNC
+#include "pcmkd_corosync.h"
+#endif
+
 #include <errno.h>
 #include <grp.h>
 #include <signal.h>
@@ -21,22 +25,25 @@
 #include <unistd.h>
 
 #include <crm/cluster.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
+
+enum child_daemon_flags {
+    child_none                  = 0,
+    child_respawn               = 1 << 0,
+    child_needs_cluster         = 1 << 1,
+    child_needs_retry           = 1 << 2,
+    child_active_before_startup = 1 << 3,
+};
 
 typedef struct pcmk_child_s {
     pid_t pid;
     int respawn_count;
-    bool respawn;
     const char *name;
     const char *uid;
     const char *command;
     const char *endpoint;  /* IPC server name */
-    bool needs_cluster;
     int check_count;
-
-    /* Anything below here will be dynamically initialized */
-    bool needs_retry;
-    bool active_before_startup;
+    uint32_t flags;
 } pcmk_child_t;
 
 #define PCMK_PROCESS_CHECK_INTERVAL 1
@@ -48,34 +55,34 @@ typedef struct pcmk_child_s {
 
 static pcmk_child_t pcmk_children[] = {
     {
-        0, 0, true,  "pacemaker-based", CRM_DAEMON_USER,
+        0, 0, "pacemaker-based", CRM_DAEMON_USER,
         CRM_DAEMON_DIR "/pacemaker-based", PCMK__SERVER_BASED_RO,
-        true
+        0, child_respawn | child_needs_cluster
     },
     {
-        0, 0, true, "pacemaker-fenced", NULL,
+        0, 0, "pacemaker-fenced", NULL,
         CRM_DAEMON_DIR "/pacemaker-fenced", "stonith-ng",
-        true
+        0, child_respawn | child_needs_cluster
     },
     {
-        0, 0, true,  "pacemaker-execd", NULL,
+        0, 0, "pacemaker-execd", NULL,
         CRM_DAEMON_DIR "/pacemaker-execd", CRM_SYSTEM_LRMD,
-        false
+        0, child_respawn
     },
     {
-        0, 0, true, "pacemaker-attrd", CRM_DAEMON_USER,
-        CRM_DAEMON_DIR "/pacemaker-attrd", T_ATTRD,
-        true
+        0, 0, "pacemaker-attrd", CRM_DAEMON_USER,
+        CRM_DAEMON_DIR "/pacemaker-attrd", PCMK__VALUE_ATTRD,
+        0, child_respawn | child_needs_cluster
     },
     {
-        0, 0, true, "pacemaker-schedulerd", CRM_DAEMON_USER,
+        0, 0, "pacemaker-schedulerd", CRM_DAEMON_USER,
         CRM_DAEMON_DIR "/pacemaker-schedulerd", CRM_SYSTEM_PENGINE,
-        false
+        0, child_respawn
     },
     {
-        0, 0, true, "pacemaker-controld", CRM_DAEMON_USER,
+        0, 0, "pacemaker-controld", CRM_DAEMON_USER,
         CRM_DAEMON_DIR "/pacemaker-controld", CRM_SYSTEM_CRMD,
-        true
+        0, child_respawn | child_needs_cluster
     },
 };
 
@@ -103,7 +110,7 @@ unsigned int shutdown_complete_state_reported_to = 0;
 gboolean shutdown_complete_state_reported_client_closed = FALSE;
 
 /* state we report when asked via pacemakerd-api status-ping */
-const char *pacemakerd_state = XML_PING_ATTR_PACEMAKERDSTATE_INIT;
+const char *pacemakerd_state = PCMK__VALUE_INIT;
 gboolean running_with_sbd = FALSE; /* local copy */
 
 GMainLoop *mainloop = NULL;
@@ -154,7 +161,7 @@ check_next_subdaemon(gpointer user_data)
                             pcmk_children[next_child].pid),
                         pcmk_children[next_child].check_count);
                 stop_child(&pcmk_children[next_child], SIGKILL);
-                if (pcmk_children[next_child].respawn) {
+                if (pcmk_is_set(pcmk_children[next_child].flags, child_respawn)) {
                     /* as long as the respawn-limit isn't reached
                        give it another round of check retries
                      */
@@ -166,7 +173,7 @@ check_next_subdaemon(gpointer user_data)
                         (long long) PCMK__SPECIAL_PID_AS_0(
                             pcmk_children[next_child].pid),
                         pcmk_children[next_child].check_count);
-                if (pcmk_children[next_child].respawn) {
+                if (pcmk_is_set(pcmk_children[next_child].flags, child_respawn)) {
                     /* as long as the respawn-limit isn't reached
                        and we haven't run out of connect retries
                        we account this as progress we are willing
@@ -180,7 +187,7 @@ check_next_subdaemon(gpointer user_data)
              */
             break;
         case pcmk_rc_ipc_unresponsive:
-            if (!pcmk_children[next_child].respawn) {
+            if (!pcmk_is_set(pcmk_children[next_child].flags, child_respawn)) {
                 /* if a subdaemon is down and we don't want it
                    to be restarted this is a success during
                    shutdown. if it isn't restarted anymore
@@ -191,7 +198,7 @@ check_next_subdaemon(gpointer user_data)
                     subdaemon_check_progress = time(NULL);
                 }
             }
-            if (!pcmk_children[next_child].active_before_startup) {
+            if (!pcmk_is_set(pcmk_children[next_child].flags, child_active_before_startup)) {
                 crm_trace("found %s[%lld] missing - signal-handler "
                           "will take care of it",
                            pcmk_children[next_child].name,
@@ -199,7 +206,7 @@ check_next_subdaemon(gpointer user_data)
                             pcmk_children[next_child].pid));
                 break;
             }
-            if (pcmk_children[next_child].respawn) {
+            if (pcmk_is_set(pcmk_children[next_child].flags, child_respawn)) {
                 crm_err("%s[%lld] terminated",
                         pcmk_children[next_child].name,
                         (long long) PCMK__SPECIAL_PID_AS_0(
@@ -264,14 +271,14 @@ pcmk_child_exit(mainloop_child_t * p, pid_t pid, int core, int signo, int exitco
             case CRM_EX_FATAL:
                 crm_warn("Shutting cluster down because %s[%d] had fatal failure",
                          name, pid);
-                child->respawn = false;
+                child->flags &= ~child_respawn;
                 fatal_error = TRUE;
                 pcmk_shutdown(SIGTERM);
                 break;
 
             case CRM_EX_PANIC:
                 crm_emerg("%s[%d] instructed the machine to reset", name, pid);
-                child->respawn = false;
+                child->flags &= ~child_respawn;
                 fatal_error = TRUE;
                 pcmk__panic(__func__);
                 pcmk_shutdown(SIGTERM);
@@ -291,20 +298,20 @@ static void
 pcmk_process_exit(pcmk_child_t * child)
 {
     child->pid = 0;
-    child->active_before_startup = false;
+    child->flags &= ~child_active_before_startup;
     child->check_count = 0;
 
     child->respawn_count += 1;
     if (child->respawn_count > MAX_RESPAWN) {
         crm_err("Child respawn count exceeded by %s", child->name);
-        child->respawn = false;
+        child->flags &= ~child_respawn;
     }
 
     if (shutdown_trigger) {
         /* resume step-wise shutdown (returned TRUE yields no parallelizing) */
         mainloop_set_trigger(shutdown_trigger);
 
-    } else if (!child->respawn) {
+    } else if (!pcmk_is_set(child->flags, child_respawn)) {
         /* nothing to do */
 
     } else if (crm_is_true(pcmk__env_option(PCMK__ENV_FAIL_FAST))) {
@@ -316,10 +323,10 @@ pcmk_process_exit(pcmk_child_t * child)
                  " appears alright per %s IPC end-point",
                  child->name, child->endpoint);
 
-    } else if (child->needs_cluster && !pcmkd_cluster_connected()) {
+    } else if (pcmk_is_set(child->flags, child_needs_cluster) && !pcmkd_cluster_connected()) {
         crm_notice("Not respawning %s subdaemon until cluster returns",
                    child->name);
-        child->needs_retry = true;
+        child->flags |= child_needs_retry;
 
     } else {
         crm_notice("Respawning %s subdaemon after unexpected exit",
@@ -336,7 +343,7 @@ pcmk_shutdown_worker(gpointer user_data)
 
     if (phase == PCMK__NELEM(pcmk_children) - 1) {
         crm_notice("Shutting down Pacemaker");
-        pacemakerd_state = XML_PING_ATTR_PACEMAKERDSTATE_SHUTTINGDOWN;
+        pacemakerd_state = PCMK__VALUE_SHUTTING_DOWN;
     }
 
     for (; phase >= 0; phase--) {
@@ -345,7 +352,7 @@ pcmk_shutdown_worker(gpointer user_data)
         if (child->pid != 0) {
             time_t now = time(NULL);
 
-            if (child->respawn) {
+            if (pcmk_is_set(child->flags, child_respawn)) {
                 if (child->pid == PCMK__SPECIAL_PID) {
                     crm_warn("The process behind %s IPC cannot be"
                              " terminated, so either wait the graceful"
@@ -359,7 +366,7 @@ pcmk_shutdown_worker(gpointer user_data)
                              child->command);
                 }
                 next_log = now + 30;
-                child->respawn = false;
+                child->flags &= ~child_respawn;
                 stop_child(child, SIGTERM);
                 if (phase < PCMK_CHILD_CONTROLD) {
                     g_timeout_add(SHUTDOWN_ESCALATION_PERIOD,
@@ -381,7 +388,7 @@ pcmk_shutdown_worker(gpointer user_data)
     }
 
     crm_notice("Shutdown complete");
-    pacemakerd_state = XML_PING_ATTR_PACEMAKERDSTATE_SHUTDOWNCOMPLETE;
+    pacemakerd_state = PCMK__VALUE_SHUTDOWN_COMPLETE;
     if (!fatal_error && running_with_sbd &&
         pcmk__get_sbd_sync_resource_startup() &&
         !shutdown_complete_state_reported_client_closed) {
@@ -393,8 +400,12 @@ pcmk_shutdown_worker(gpointer user_data)
     {
         const char *delay = pcmk__env_option(PCMK__ENV_SHUTDOWN_DELAY);
         if(delay) {
+            long long delay_ms = crm_get_msec(delay);
+
             sync();
-            pcmk__sleep_ms(crm_get_msec(delay));
+            if (delay_ms > 0) {
+                pcmk__sleep_ms((unsigned int) QB_MIN(delay_ms, UINT_MAX));
+            }
         }
     }
 
@@ -427,7 +438,7 @@ start_child(pcmk_child_t * child)
     const char *env_valgrind = pcmk__env_option(PCMK__ENV_VALGRIND_ENABLED);
     const char *env_callgrind = pcmk__env_option(PCMK__ENV_CALLGRIND_ENABLED);
 
-    child->active_before_startup = false;
+    child->flags &= ~child_active_before_startup;
     child->check_count = 0;
 
     if (child->command == NULL) {
@@ -481,19 +492,20 @@ start_child(pcmk_child_t * child)
         (void)setsid();
 
         /* Setup the two alternate arg arrays */
-        opts_vgrind[0] = strdup(VALGRIND_BIN);
+        opts_vgrind[0] = pcmk__str_copy(VALGRIND_BIN);
         if (use_callgrind) {
-            opts_vgrind[1] = strdup("--tool=callgrind");
-            opts_vgrind[2] = strdup("--callgrind-out-file=" CRM_STATE_DIR "/callgrind.out.%p");
-            opts_vgrind[3] = strdup(child->command);
+            opts_vgrind[1] = pcmk__str_copy("--tool=callgrind");
+            opts_vgrind[2] = pcmk__str_copy("--callgrind-out-file="
+                                            CRM_STATE_DIR "/callgrind.out.%p");
+            opts_vgrind[3] = pcmk__str_copy(child->command);
             opts_vgrind[4] = NULL;
         } else {
-            opts_vgrind[1] = strdup(child->command);
+            opts_vgrind[1] = pcmk__str_copy(child->command);
             opts_vgrind[2] = NULL;
             opts_vgrind[3] = NULL;
             opts_vgrind[4] = NULL;
         }
-        opts_default[0] = strdup(child->command);
+        opts_default[0] = pcmk__str_copy(child->command);
 
         if(gid) {
             // Drop root group access if not needed
@@ -759,7 +771,7 @@ find_and_track_existing_processes(void)
                                (long long) PCMK__SPECIAL_PID_AS_0(
                                                pcmk_children[i].pid));
                     pcmk_children[i].respawn_count = -1;  /* 0~keep watching */
-                    pcmk_children[i].active_before_startup = true;
+                    pcmk_children[i].flags |= child_active_before_startup;
                     break;
                 case pcmk_rc_ipc_pid_only:
                     if (pcmk_children[i].respawn_count == WAIT_TRIES) {
@@ -802,7 +814,7 @@ find_and_track_existing_processes(void)
 gboolean
 init_children_processes(void *user_data)
 {
-    if (is_corosync_cluster()) {
+    if (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync) {
         /* Corosync clusters can drop root group access, because we set
          * uidgid.gid.${gid}=1 via CMAP, which allows these processes to connect
          * to corosync.
@@ -825,8 +837,8 @@ init_children_processes(void *user_data)
      *
      * This may be useful for the daemons to know
      */
-    pcmk__set_env_option(PCMK__ENV_RESPAWNED, "true", false);
-    pacemakerd_state = XML_PING_ATTR_PACEMAKERDSTATE_RUNNING;
+    pcmk__set_env_option(PCMK__ENV_RESPAWNED, PCMK_VALUE_TRUE, false);
+    pacemakerd_state = PCMK__VALUE_RUNNING;
     return TRUE;
 }
 
@@ -843,13 +855,13 @@ void
 restart_cluster_subdaemons(void)
 {
     for (int i = 0; i < PCMK__NELEM(pcmk_children); i++) {
-        if (!pcmk_children[i].needs_retry || pcmk_children[i].pid != 0) {
+        if (!pcmk_is_set(pcmk_children[i].flags, child_needs_retry) || pcmk_children[i].pid != 0) {
             continue;
         }
 
         crm_notice("Respawning cluster-based subdaemon: %s", pcmk_children[i].name);
         if (start_child(&pcmk_children[i])) {
-            pcmk_children[i].needs_retry = false;
+            pcmk_children[i].flags &= ~child_needs_retry;
         }
     }
 }
diff --git a/daemons/schedulerd/pacemaker-schedulerd.c b/daemons/schedulerd/pacemaker-schedulerd.c
index 3f2a3e8..d1b9362 100644
--- a/daemons/schedulerd/pacemaker-schedulerd.c
+++ b/daemons/schedulerd/pacemaker-schedulerd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -31,8 +31,8 @@ struct {
 } options;
 
 pcmk__output_t *logger_out = NULL;
-pcmk__output_t *out = NULL;
 
+static pcmk__output_t *out = NULL;
 static GMainLoop *mainloop = NULL;
 static qb_ipcs_service_t *ipcs = NULL;
 static crm_exit_t exit_code = CRM_EX_OK;
@@ -46,6 +46,19 @@ pcmk__supported_format_t formats[] = {
 
 void pengine_shutdown(int nsig);
 
+/* @COMPAT Deprecated since 2.1.8. Use pcmk_list_cluster_options() or
+ * crm_attribute --list-options=cluster instead of querying daemon metadata.
+ */
+static int
+scheduler_metadata(pcmk__output_t *out)
+{
+    return pcmk__daemon_metadata(out, "pacemaker-schedulerd",
+                                 "Pacemaker scheduler options",
+                                 "Cluster options used by Pacemaker's "
+                                 "scheduler",
+                                 pcmk__opt_schedulerd);
+}
+
 static GOptionContext *
 build_arg_context(pcmk__common_args_t *args, GOptionGroup **group) {
     GOptionContext *context = NULL;
@@ -58,8 +71,7 @@ build_arg_context(pcmk__common_args_t *args, GOptionGroup **group) {
         { NULL }
     };
 
-    context = pcmk__build_arg_context(args, "text (default), xml", group,
-                                      "[metadata]");
+    context = pcmk__build_arg_context(args, "text (default), xml", group, NULL);
     pcmk__add_main_args(context, extra_prog_entries);
     return context;
 }
@@ -98,14 +110,20 @@ main(int argc, char **argv)
     if (options.remainder) {
         if (g_strv_length(options.remainder) == 1 &&
             pcmk__str_eq("metadata", options.remainder[0], pcmk__str_casei)) {
-            pe_metadata(out);
-            goto done;
+
+            rc = scheduler_metadata(out);
+            if (rc != pcmk_rc_ok) {
+                exit_code = CRM_EX_FATAL;
+                g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
+                            "Unable to display metadata: %s", pcmk_rc_str(rc));
+            }
+
         } else {
             exit_code = CRM_EX_USAGE;
             g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
                         "Unsupported extra command line parameters");
-            goto done;
         }
+        goto done;
     }
 
     if (args->version) {
diff --git a/daemons/schedulerd/pacemaker-schedulerd.h b/daemons/schedulerd/pacemaker-schedulerd.h
index 75b7d38..a7c56e1 100644
--- a/daemons/schedulerd/pacemaker-schedulerd.h
+++ b/daemons/schedulerd/pacemaker-schedulerd.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -14,7 +14,6 @@
 #include <crm/common/scheduler.h>
 
 extern pcmk__output_t *logger_out;
-extern pcmk__output_t *out;
 extern struct qb_ipcs_service_handlers ipc_callbacks;
 
 #endif
diff --git a/daemons/schedulerd/schedulerd_messages.c b/daemons/schedulerd/schedulerd_messages.c
index 5a97365..5dcec39 100644
--- a/daemons/schedulerd/schedulerd_messages.c
+++ b/daemons/schedulerd/schedulerd_messages.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2023 the Pacemaker project contributors
+ * Copyright 2004-2024 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
@@ -10,7 +10,7 @@
 #include <crm_internal.h>
 
 #include <crm/crm.h>
-#include <crm/msg_xml.h>
+#include <crm/common/xml.h>
 #include <pacemaker-internal.h>
 
 #include <stdbool.h>
@@ -27,7 +27,7 @@ init_working_set(void)
 {
     pcmk_scheduler_t *scheduler = pe_new_working_set();
 
-    CRM_ASSERT(scheduler != NULL);
+    pcmk__mem_assert(scheduler);
 
     crm_config_error = FALSE;
     crm_config_warning = FALSE;
@@ -51,13 +51,14 @@ handle_pecalc_request(pcmk__request_t *request)
          */
         int wrap;
     } series[] = {
-        { "pe-error", "pe-error-series-max", -1 },
-        { "pe-warn",  "pe-warn-series-max",  5000 },
-        { "pe-input", "pe-input-series-max", 4000 },
+        { "pe-error", PCMK_OPT_PE_ERROR_SERIES_MAX, -1 },
+        { "pe-warn",  PCMK_OPT_PE_WARN_SERIES_MAX, 5000 },
+        { "pe-input", PCMK_OPT_PE_INPUT_SERIES_MAX, 4000 },
     };
 
     xmlNode *msg = request->xml;
-    xmlNode *xml_data = get_message_xml(msg, F_CRM_DATA);
+    xmlNode *wrapper = pcmk__xe_first_child(msg, PCMK__XE_CRM_XML, NULL, NULL);
+    xmlNode *xml_data = pcmk__xe_first_child(wrapper, NULL, NULL, NULL);
 
     static char *last_digest = NULL;
     static char *filename = NULL;
@@ -75,15 +76,15 @@ handle_pecalc_request(pcmk__request_t *request)
     pcmk_scheduler_t *scheduler = init_working_set();
 
     pcmk__ipc_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags,
-                       "ack", NULL, CRM_EX_INDETERMINATE);
+                       PCMK__XE_ACK, NULL, CRM_EX_INDETERMINATE);
 
     digest = calculate_xml_versioned_digest(xml_data, FALSE, FALSE,
                                             CRM_FEATURE_SET);
-    converted = copy_xml(xml_data);
-    if (!cli_config_update(&converted, NULL, TRUE)) {
-        scheduler->graph = create_xml_node(NULL, XML_TAG_GRAPH);
+    converted = pcmk__xml_copy(NULL, xml_data);
+    if (pcmk_update_configured_schema(&converted, true) != pcmk_rc_ok) {
+        scheduler->graph = pcmk__xe_create(NULL, PCMK__XE_TRANSITION_GRAPH);
         crm_xml_add_int(scheduler->graph, "transition_id", 0);
-        crm_xml_add_int(scheduler->graph, "cluster-delay", 0);
+        crm_xml_add_int(scheduler->graph, PCMK_OPT_CLUSTER_DELAY, 0);
         process = false;
         free(digest);
 
@@ -104,15 +105,16 @@ handle_pecalc_request(pcmk__request_t *request)
     }
 
     // Get appropriate index into series[] array
-    if (was_processing_error) {
+    if (was_processing_error || crm_config_error) {
         series_id = 0;
-    } else if (was_processing_warning) {
+    } else if (was_processing_warning || crm_config_warning) {
         series_id = 1;
     } else {
         series_id = 2;
     }
 
-    value = pe_pref(scheduler->config_hash, series[series_id].param);
+    value = pcmk__cluster_option(scheduler->config_hash,
+                                 series[series_id].param);
     if ((value == NULL)
         || (pcmk__scan_min_int(value, &series_wrap, -1) != pcmk_rc_ok)) {
         series_wrap = series[series_id].wrap;
@@ -146,7 +148,7 @@ handle_pecalc_request(pcmk__request_t *request)
                                          series[series_id].name, seq, true);
     }
 
-    crm_xml_add(reply, F_CRM_TGRAPH_INPUT, filename);
+    crm_xml_add(reply, PCMK__XA_CRM_TGRAPH_IN, filename);
     crm_xml_add_int(reply, PCMK__XA_GRAPH_ERRORS, was_processing_error);
     crm_xml_add_int(reply, PCMK__XA_GRAPH_WARNINGS, was_processing_warning);
     crm_xml_add_int(reply, PCMK__XA_CONFIG_ERRORS, crm_config_error);
@@ -162,8 +164,9 @@ handle_pecalc_request(pcmk__request_t *request)
 
     } else {
         unlink(filename);
-        crm_xml_add_ll(xml_data, "execution-date", (long long) execution_date);
-        write_xml_file(xml_data, filename, TRUE);
+        crm_xml_add_ll(xml_data, PCMK_XA_EXECUTION_DATE,
+                       (long long) execution_date);
+        pcmk__xml_write_file(xml_data, filename, true, NULL);
         pcmk__write_series_sequence(PE_STATE_DIR, series[series_id].name,
                                     ++seq, series_wrap);
     }
@@ -181,7 +184,7 @@ static xmlNode *
 handle_unknown_request(pcmk__request_t *request)
 {
     pcmk__ipc_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags,
-                       "ack", NULL, CRM_EX_INVALID_PARAM);
+                       PCMK__XE_ACK, NULL, CRM_EX_INVALID_PARAM);
 
     pcmk__format_result(&request->result, CRM_EX_PROTOCOL, PCMK_EXEC_INVALID,
                         "Unknown IPC request type '%s' (bug?)",
@@ -193,7 +196,7 @@ static xmlNode *
 handle_hello_request(pcmk__request_t *request)
 {
     pcmk__ipc_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags,
-                       "ack", NULL, CRM_EX_INDETERMINATE);
+                       PCMK__XE_ACK, NULL, CRM_EX_INDETERMINATE);
 
     crm_trace("Received IPC hello from %s", pcmk__client_name(request->ipc_client));
 
@@ -218,7 +221,7 @@ pe_ipc_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
 {
     crm_trace("Connection %p", c);
     if (pcmk__new_client(c, uid, gid) == NULL) {
-        return -EIO;
+        return -ENOMEM;
     }
     return 0;
 }
@@ -240,19 +243,21 @@ pe_ipc_dispatch(qb_ipcs_connection_t * qbc, void *data, size_t size)
 
     msg = pcmk__client_data2xml(c, data, &id, &flags);
     if (msg == NULL) {
-        pcmk__ipc_send_ack(c, id, flags, "ack", NULL, CRM_EX_PROTOCOL);
+        pcmk__ipc_send_ack(c, id, flags, PCMK__XE_ACK, NULL, CRM_EX_PROTOCOL);
         return 0;
     }
 
-    sys_to = crm_element_value(msg, F_CRM_SYS_TO);
+    sys_to = crm_element_value(msg, PCMK__XA_CRM_SYS_TO);
 
-    if (pcmk__str_eq(crm_element_value(msg, F_CRM_MSG_TYPE),
-                            XML_ATTR_RESPONSE, pcmk__str_none)) {
-        pcmk__ipc_send_ack(c, id, flags, "ack", NULL, CRM_EX_INDETERMINATE);
+    if (pcmk__str_eq(crm_element_value(msg, PCMK__XA_SUBT),
+                     PCMK__VALUE_RESPONSE, pcmk__str_none)) {
+        pcmk__ipc_send_ack(c, id, flags, PCMK__XE_ACK, NULL,
+                           CRM_EX_INDETERMINATE);
         crm_info("Ignoring IPC reply from %s", pcmk__client_name(c));
 
     } else if (!pcmk__str_eq(sys_to, CRM_SYSTEM_PENGINE, pcmk__str_none)) {
-        pcmk__ipc_send_ack(c, id, flags, "ack", NULL, CRM_EX_INDETERMINATE);
+        pcmk__ipc_send_ack(c, id, flags, PCMK__XE_ACK, NULL,
+                           CRM_EX_INDETERMINATE);
         crm_info("Ignoring invalid IPC message: to '%s' not "
                  CRM_SYSTEM_PENGINE, pcmk__s(sys_to, ""));
 
@@ -271,7 +276,7 @@ pe_ipc_dispatch(qb_ipcs_connection_t * qbc, void *data, size_t size)
             .result         = PCMK__UNKNOWN_RESULT,
         };
 
-        request.op = crm_element_value_copy(request.xml, F_CRM_TASK);
+        request.op = crm_element_value_copy(request.xml, PCMK__XA_CRM_TASK);
         CRM_CHECK(request.op != NULL, return 0);
 
         reply = pcmk__process_request(&request, schedulerd_handlers);