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diff --git a/src/xml/simple-document.h b/src/xml/simple-document.h
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+++ b/src/xml/simple-document.h
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Inkscape::XML::SimpleDocument - generic XML document implementation
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Copyright 2004-2005 MenTaLguY <mental@rydia.net>
+ * 
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_INKSCAPE_XML_SIMPLE_DOCUMENT_H
+#define SEEN_INKSCAPE_XML_SIMPLE_DOCUMENT_H
+
+#include "xml/document.h"
+#include "xml/simple-node.h"
+#include "xml/node-observer.h"
+#include "xml/log-builder.h"
+
+namespace Inkscape {
+
+namespace XML {
+
+class SimpleDocument : public SimpleNode,
+                       public Document,
+                       public NodeObserver
+{
+public:
+    explicit SimpleDocument()
+    : SimpleNode(g_quark_from_static_string("xml"), this),
+      _in_transaction(false) {}
+
+    NodeType type() const override { return Inkscape::XML::NodeType::DOCUMENT_NODE; }
+
+    bool inTransaction() override { return _in_transaction; }
+
+    void beginTransaction() override;
+    void rollback() override;
+    void commit() override;
+    Inkscape::XML::Event *commitUndoable() override;
+
+    Node *createElement(char const *name) override;
+    Node *createTextNode(char const *content) override;
+    Node *createTextNode(char const *content, bool const is_CData) override;
+    Node *createComment(char const *content) override;
+    Node *createPI(char const *target, char const *content) override;
+
+    void notifyChildAdded(Node &parent, Node &child, Node *prev) override;
+
+    void notifyChildRemoved(Node &parent, Node &child, Node *prev) override;
+
+    void notifyChildOrderChanged(Node &parent, Node &child,
+                                 Node *old_prev, Node *new_prev) override;
+
+    void notifyContentChanged(Node &node,
+                              Util::ptr_shared old_content,
+                              Util::ptr_shared new_content) override;
+
+    void notifyAttributeChanged(Node &node, GQuark name,
+                                Util::ptr_shared old_value,
+                                Util::ptr_shared new_value) override;
+
+    void notifyElementNameChanged(Node& node, GQuark old_name, GQuark new_name) override;
+
+protected:
+    SimpleDocument(SimpleDocument const &doc)
+    : Node(), SimpleNode(doc), Document(), NodeObserver(),
+      _in_transaction(false)
+      {}
+
+    SimpleNode *_duplicate(Document* /*doc*/) const override
+    {
+        return new SimpleDocument(*this);
+    }
+    NodeObserver *logger() override { return this; }
+
+private:
+    bool _in_transaction;
+    LogBuilder _log_builder;
+};
+
+}
+
+}
+
+#endif
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :