Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

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

8 files changed, 3806 insertions, 0 deletions

diff --git a/unoxml/source/rdf/CBlankNode.cxx b/unoxml/source/rdf/CBlankNode.cxx
new file mode 100644
index 000000000..44d0017bb
--- /dev/null
+++ b/unoxml/source/rdf/CBlankNode.cxx
@@ -0,0 +1,133 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "CNodes.hxx"
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/rdf/XBlankNode.hpp>
+
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+
+
+/// anonymous implementation namespace
+namespace {
+
+class CBlankNode:
+    public ::cppu::WeakImplHelper<
+        css::lang::XServiceInfo,
+        css::lang::XInitialization,
+        css::rdf::XBlankNode>
+{
+public:
+    CBlankNode();
+
+    // css::lang::XServiceInfo:
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString & ServiceName) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // css::lang::XInitialization:
+    virtual void SAL_CALL initialize(const css::uno::Sequence< css::uno::Any > & aArguments) override;
+
+    // css::rdf::XNode:
+    virtual OUString SAL_CALL getStringValue() override;
+
+private:
+    CBlankNode(CBlankNode const&) = delete;
+    CBlankNode& operator=(CBlankNode const&) = delete;
+
+    OUString m_NodeID;
+};
+
+CBlankNode::CBlankNode() :
+    m_NodeID()
+{}
+
+// com.sun.star.uno.XServiceInfo:
+OUString SAL_CALL CBlankNode::getImplementationName()
+{
+    return comp_CBlankNode::_getImplementationName();
+}
+
+sal_Bool SAL_CALL CBlankNode::supportsService(OUString const & serviceName)
+{
+    return cppu::supportsService(this, serviceName);
+}
+
+css::uno::Sequence< OUString > SAL_CALL CBlankNode::getSupportedServiceNames()
+{
+    return comp_CBlankNode::_getSupportedServiceNames();
+}
+
+// css::lang::XInitialization:
+void SAL_CALL CBlankNode::initialize(const css::uno::Sequence< css::uno::Any > & aArguments)
+{
+    if (aArguments.getLength() != 1) {
+        throw css::lang::IllegalArgumentException(
+            "CBlankNode::initialize: must give exactly 1 argument", *this, 1);
+    }
+
+    OUString arg;
+    if (!(aArguments[0] >>= arg)) {
+        throw css::lang::IllegalArgumentException(
+            "CBlankNode::initialize: argument must be string", *this, 0);
+    }
+
+    //FIXME: what is legal?
+    if (arg.isEmpty()) {
+        throw css::lang::IllegalArgumentException(
+            "CBlankNode::initialize: argument is not valid blank node ID", *this, 0);
+    }
+    m_NodeID = arg;
+}
+
+// css::rdf::XNode:
+OUString SAL_CALL CBlankNode::getStringValue()
+{
+    return m_NodeID;
+}
+
+} // closing anonymous implementation namespace
+
+
+// component helper namespace
+namespace comp_CBlankNode {
+
+OUString _getImplementationName() {
+    return "CBlankNode";
+}
+
+css::uno::Sequence< OUString > _getSupportedServiceNames()
+{
+    css::uno::Sequence< OUString > s { "com.sun.star.rdf.BlankNode" };
+    return s;
+}
+
+css::uno::Reference< css::uno::XInterface > _create(
+    const css::uno::Reference< css::uno::XComponentContext > & )
+{
+    return static_cast< ::cppu::OWeakObject * >(new CBlankNode);
+}
+
+} // closing component helper namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/unoxml/source/rdf/CLiteral.cxx b/unoxml/source/rdf/CLiteral.cxx
new file mode 100644
index 000000000..3c8672a64
--- /dev/null
+++ b/unoxml/source/rdf/CLiteral.cxx
@@ -0,0 +1,182 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "CNodes.hxx"
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/rdf/XLiteral.hpp>
+
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+
+
+/// anonymous implementation namespace
+namespace {
+
+class CLiteral:
+    public ::cppu::WeakImplHelper<
+        css::lang::XServiceInfo,
+        css::lang::XInitialization,
+        css::rdf::XLiteral>
+{
+public:
+    explicit CLiteral();
+
+    // css::lang::XServiceInfo:
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString & ServiceName) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // css::lang::XInitialization:
+    virtual void SAL_CALL initialize(const css::uno::Sequence< css::uno::Any > & aArguments) override;
+
+    // css::rdf::XNode:
+    virtual OUString SAL_CALL getStringValue() override;
+
+    // css::rdf::XLiteral:
+    virtual OUString SAL_CALL getValue() override;
+    virtual OUString SAL_CALL getLanguage() override;
+    virtual css::uno::Reference< css::rdf::XURI > SAL_CALL getDatatype() override;
+
+private:
+    CLiteral(CLiteral const&) = delete;
+    CLiteral& operator=(CLiteral const&) = delete;
+
+    OUString m_Value;
+    OUString m_Language;
+    css::uno::Reference< css::rdf::XURI > m_xDatatype;
+};
+
+CLiteral::CLiteral() :
+    m_Value(), m_Language(), m_xDatatype()
+{}
+
+// com.sun.star.uno.XServiceInfo:
+OUString SAL_CALL CLiteral::getImplementationName()
+{
+    return comp_CLiteral::_getImplementationName();
+}
+
+sal_Bool SAL_CALL CLiteral::supportsService(OUString const & serviceName)
+{
+    return cppu::supportsService(this, serviceName);
+}
+
+css::uno::Sequence< OUString > SAL_CALL CLiteral::getSupportedServiceNames()
+{
+    return comp_CLiteral::_getSupportedServiceNames();
+}
+
+// css::lang::XInitialization:
+void SAL_CALL CLiteral::initialize(const css::uno::Sequence< css::uno::Any > & aArguments)
+{
+    const sal_Int32 len( aArguments.getLength() );
+    if (len < 1 || len > 2) {
+            throw css::lang::IllegalArgumentException(
+                "CLiteral::initialize: must give 1 or 2 argument(s)", *this, 2);
+    }
+
+    OUString arg0;
+    if (!(aArguments[0] >>= arg0)) {
+        throw css::lang::IllegalArgumentException(
+            "CLiteral::initialize: argument must be string", *this, 0);
+    }
+    //FIXME: what is legal?
+    if (!(true)) {
+        throw css::lang::IllegalArgumentException(
+            "CLiteral::initialize: argument is not valid literal value", *this, 0);
+    }
+    m_Value = arg0;
+
+    if (len > 1) {
+        OUString arg1;
+        css::uno::Reference< css::rdf::XURI > xURI;
+        if (aArguments[1] >>= arg1) {
+            if (arg1.isEmpty()) {
+                throw css::lang::IllegalArgumentException(
+                    "CLiteral::initialize: argument is not valid language", *this, 1);
+            }
+            m_Language = arg1;
+        } else if (aArguments[1] >>= xURI) {
+            if (!xURI.is()) {
+                throw css::lang::IllegalArgumentException(
+                    "CLiteral::initialize: argument is null", *this, 1);
+            }
+            m_xDatatype = xURI;
+        } else {
+            throw css::lang::IllegalArgumentException(
+                "CLiteral::initialize: argument must be string or URI", *this, 1);
+        }
+    }
+}
+
+// css::rdf::XNode:
+OUString SAL_CALL CLiteral::getStringValue()
+{
+    if (!m_Language.isEmpty()) {
+        return m_Value + "@" + m_Language;
+    } else if (m_xDatatype.is()) {
+        return m_Value + "^^" +  m_xDatatype->getStringValue();
+    } else {
+        return m_Value;
+    }
+}
+
+// css::rdf::XLiteral:
+OUString SAL_CALL CLiteral::getValue()
+{
+    return m_Value;
+}
+
+OUString SAL_CALL CLiteral::getLanguage()
+{
+    return m_Language;
+}
+
+css::uno::Reference< css::rdf::XURI > SAL_CALL CLiteral::getDatatype()
+{
+    return m_xDatatype;
+}
+
+} // closing anonymous implementation namespace
+
+
+// component helper namespace
+namespace comp_CLiteral {
+
+OUString _getImplementationName() {
+    return "CLiteral";
+}
+
+css::uno::Sequence< OUString > _getSupportedServiceNames()
+{
+    return { "com.sun.star.rdf.Literal" };
+}
+
+css::uno::Reference< css::uno::XInterface > _create(
+    const css::uno::Reference< css::uno::XComponentContext > & )
+{
+    return static_cast< ::cppu::OWeakObject * >(new CLiteral);
+}
+
+} // closing component helper namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/unoxml/source/rdf/CNodes.hxx b/unoxml/source/rdf/CNodes.hxx
new file mode 100644
index 000000000..3ee915697
--- /dev/null
+++ b/unoxml/source/rdf/CNodes.hxx
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_UNOXML_SOURCE_RDF_CNODES_HXX
+#define INCLUDED_UNOXML_SOURCE_RDF_CNODES_HXX
+
+#include <sal/config.h>
+#include <cppuhelper/factory.hxx>
+
+
+// component helper namespace
+namespace comp_CBlankNode {
+
+// component and service helper functions:
+OUString _getImplementationName();
+css::uno::Sequence< OUString > _getSupportedServiceNames();
+css::uno::Reference< css::uno::XInterface > _create( css::uno::Reference< css::uno::XComponentContext > const & context );
+
+} // closing component helper namespace
+
+
+// component helper namespace
+namespace comp_CURI {
+
+// component and service helper functions:
+OUString _getImplementationName();
+css::uno::Sequence< OUString > _getSupportedServiceNames();
+css::uno::Reference< css::uno::XInterface > _create( css::uno::Reference< css::uno::XComponentContext > const & context );
+
+} // closing component helper namespace
+
+
+// component helper namespace
+namespace comp_CLiteral {
+
+// component and service helper functions:
+OUString _getImplementationName();
+css::uno::Sequence< OUString > _getSupportedServiceNames();
+css::uno::Reference< css::uno::XInterface > _create( css::uno::Reference< css::uno::XComponentContext > const & context );
+
+} // closing component helper namespace
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/unoxml/source/rdf/CURI.cxx b/unoxml/source/rdf/CURI.cxx
new file mode 100644
index 000000000..bacc42697
--- /dev/null
+++ b/unoxml/source/rdf/CURI.cxx
@@ -0,0 +1,817 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "CNodes.hxx"
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/rdf/XURI.hpp>
+#include <com/sun/star/rdf/URIs.hpp>
+
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+
+
+/// anonymous implementation namespace
+namespace {
+
+class CURI:
+    public ::cppu::WeakImplHelper<
+        css::lang::XServiceInfo,
+        css::lang::XInitialization,
+        css::rdf::XURI>
+{
+public:
+    explicit CURI();
+
+    // css::lang::XServiceInfo:
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString & ServiceName) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // css::lang::XInitialization:
+    virtual void SAL_CALL initialize(const css::uno::Sequence< css::uno::Any > & aArguments) override;
+
+    // css::rdf::XNode:
+    virtual OUString SAL_CALL getStringValue() override;
+
+    // css::rdf::XURI:
+    virtual OUString SAL_CALL getLocalName() override;
+    virtual OUString SAL_CALL getNamespace() override;
+
+private:
+    CURI(CURI const&) = delete;
+    CURI& operator=(CURI const&) = delete;
+
+    /// handle css.rdf.URIs
+    void initFromConstant(const sal_Int16 i_Constant);
+
+    OUString m_Namespace;
+    OUString m_LocalName;
+};
+
+CURI::CURI() :
+    m_Namespace(), m_LocalName()
+{}
+
+// com.sun.star.uno.XServiceInfo:
+OUString SAL_CALL CURI::getImplementationName()
+{
+    return comp_CURI::_getImplementationName();
+}
+
+sal_Bool SAL_CALL CURI::supportsService(OUString const & serviceName)
+{
+    return cppu::supportsService(this, serviceName);
+}
+
+css::uno::Sequence< OUString > SAL_CALL CURI::getSupportedServiceNames()
+{
+    return comp_CURI::_getSupportedServiceNames();
+}
+
+const char s_nsXSD      [] = "http://www.w3.org/2001/XMLSchema-datatypes#";
+const char s_nsRDF      [] = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
+const char s_nsRDFs     [] = "http://www.w3.org/2000/01/rdf-schema#";
+const char s_nsOWL      [] = "http://www.w3.org/2002/07/owl#";
+const char s_nsPkg      [] =
+    "http://docs.oasis-open.org/ns/office/1.2/meta/pkg#";
+const char s_nsODF      [] =
+    "http://docs.oasis-open.org/ns/office/1.2/meta/odf#";
+
+void CURI::initFromConstant(const sal_Int16 i_Constant)
+{
+    const char *ns(nullptr);
+    const char *ln(nullptr);
+    switch (i_Constant)
+    {
+        case css::rdf::URIs::XSD_NCNAME:
+            ns = s_nsXSD;
+            ln = "NCName";
+            break;
+
+        case css::rdf::URIs::XSD_STRING:
+            ns = s_nsXSD;
+            ln = "string";
+            break;
+
+        case css::rdf::URIs::XSD_NORMALIZEDSTRING:
+            ns = s_nsXSD;
+            ln = "normalizedString";
+            break;
+
+        case css::rdf::URIs::XSD_BOOLEAN:
+            ns = s_nsXSD;
+            ln = "boolean";
+            break;
+
+        case css::rdf::URIs::XSD_DECIMAL:
+            ns = s_nsXSD;
+            ln = "decimal";
+            break;
+
+        case css::rdf::URIs::XSD_FLOAT:
+            ns = s_nsXSD;
+            ln = "float";
+            break;
+
+        case css::rdf::URIs::XSD_DOUBLE:
+            ns = s_nsXSD;
+            ln = "double";
+            break;
+
+        case css::rdf::URIs::XSD_INTEGER:
+            ns = s_nsXSD;
+            ln = "integer";
+            break;
+
+        case css::rdf::URIs::XSD_NONNEGATIVEINTEGER:
+            ns = s_nsXSD;
+            ln = "nonNegativeInteger";
+            break;
+
+        case css::rdf::URIs::XSD_POSITIVEINTEGER:
+            ns = s_nsXSD;
+            ln = "positiveInteger";
+            break;
+
+        case css::rdf::URIs::XSD_NONPOSITIVEINTEGER:
+            ns = s_nsXSD;
+            ln = "nonPositiveInteger";
+            break;
+
+        case css::rdf::URIs::XSD_NEGATIVEINTEGER:
+            ns = s_nsXSD;
+            ln = "negativeInteger";
+            break;
+
+        case css::rdf::URIs::XSD_LONG:
+            ns = s_nsXSD;
+            ln = "long";
+            break;
+
+        case css::rdf::URIs::XSD_INT:
+            ns = s_nsXSD;
+            ln = "int";
+            break;
+
+        case css::rdf::URIs::XSD_SHORT:
+            ns = s_nsXSD;
+            ln = "short";
+            break;
+
+        case css::rdf::URIs::XSD_BYTE:
+            ns = s_nsXSD;
+            ln = "byte";
+            break;
+
+        case css::rdf::URIs::XSD_UNSIGNEDLONG:
+            ns = s_nsXSD;
+            ln = "unsignedLong";
+            break;
+
+        case css::rdf::URIs::XSD_UNSIGNEDINT:
+            ns = s_nsXSD;
+            ln = "unsignedInt";
+            break;
+
+        case css::rdf::URIs::XSD_UNSIGNEDSHORT:
+            ns = s_nsXSD;
+            ln = "unsignedShort";
+            break;
+
+        case css::rdf::URIs::XSD_UNSIGNEDBYTE:
+            ns = s_nsXSD;
+            ln = "unsignedByte";
+            break;
+
+        case css::rdf::URIs::XSD_HEXBINARY:
+            ns = s_nsXSD;
+            ln = "hexBinary";
+            break;
+
+        case css::rdf::URIs::XSD_BASE64BINARY:
+            ns = s_nsXSD;
+            ln = "base64Binary";
+            break;
+
+        case css::rdf::URIs::XSD_DATETIME:
+            ns = s_nsXSD;
+            ln = "dateTime";
+            break;
+
+        case css::rdf::URIs::XSD_TIME:
+            ns = s_nsXSD;
+            ln = "time";
+            break;
+
+        case css::rdf::URIs::XSD_DATE:
+            ns = s_nsXSD;
+            ln = "date";
+            break;
+
+        case css::rdf::URIs::XSD_GYEARMONTH:
+            ns = s_nsXSD;
+            ln = "gYearMonth";
+            break;
+
+        case css::rdf::URIs::XSD_GYEAR:
+            ns = s_nsXSD;
+            ln = "gYear";
+            break;
+
+        case css::rdf::URIs::XSD_GMONTHDAY:
+            ns = s_nsXSD;
+            ln = "gMonthDay";
+            break;
+
+        case css::rdf::URIs::XSD_GDAY:
+            ns = s_nsXSD;
+            ln = "gDay";
+            break;
+
+        case css::rdf::URIs::XSD_GMONTH:
+            ns = s_nsXSD;
+            ln = "gMonth";
+            break;
+
+        case css::rdf::URIs::XSD_ANYURI:
+            ns = s_nsXSD;
+            ln = "anyURI";
+            break;
+
+        case css::rdf::URIs::XSD_TOKEN:
+            ns = s_nsXSD;
+            ln = "token";
+            break;
+
+        case css::rdf::URIs::XSD_LANGUAGE:
+            ns = s_nsXSD;
+            ln = "language";
+            break;
+
+        case css::rdf::URIs::XSD_NMTOKEN:
+            ns = s_nsXSD;
+            ln = "NMTOKEN";
+            break;
+
+        case css::rdf::URIs::XSD_NAME:
+            ns = s_nsXSD;
+            ln = "Name";
+            break;
+
+        case css::rdf::URIs::XSD_DURATION:
+            ns = s_nsXSD;
+            ln = "duration";
+            break;
+
+        case css::rdf::URIs::XSD_QNAME:
+            ns = s_nsXSD;
+            ln = "QName";
+            break;
+
+        case css::rdf::URIs::XSD_NOTATION:
+            ns = s_nsXSD;
+            ln = "NOTATION";
+            break;
+
+        case css::rdf::URIs::XSD_NMTOKENS:
+            ns = s_nsXSD;
+            ln = "NMTOKENS";
+            break;
+
+        case css::rdf::URIs::XSD_ID:
+            ns = s_nsXSD;
+            ln = "ID";
+            break;
+
+        case css::rdf::URIs::XSD_IDREF:
+            ns = s_nsXSD;
+            ln = "IDREF";
+            break;
+
+        case css::rdf::URIs::XSD_IDREFS:
+            ns = s_nsXSD;
+            ln = "IDREFS";
+            break;
+
+        case css::rdf::URIs::XSD_ENTITY:
+            ns = s_nsXSD;
+            ln = "ENTITY";
+            break;
+
+        case css::rdf::URIs::XSD_ENTITIES:
+            ns = s_nsXSD;
+            ln = "ENTITIES";
+            break;
+
+        case css::rdf::URIs::RDF_TYPE:
+            ns = s_nsRDF;
+            ln = "type";
+            break;
+
+        case css::rdf::URIs::RDF_SUBJECT:
+            ns = s_nsRDF;
+            ln = "subject";
+            break;
+
+        case css::rdf::URIs::RDF_PREDICATE:
+            ns = s_nsRDF;
+            ln = "predicate";
+            break;
+
+        case css::rdf::URIs::RDF_OBJECT:
+            ns = s_nsRDF;
+            ln = "object";
+            break;
+
+        case css::rdf::URIs::RDF_PROPERTY:
+            ns = s_nsRDF;
+            ln = "Property";
+            break;
+
+        case css::rdf::URIs::RDF_STATEMENT:
+            ns = s_nsRDF;
+            ln = "Statement";
+            break;
+
+        case css::rdf::URIs::RDF_VALUE:
+            ns = s_nsRDF;
+            ln = "value";
+            break;
+
+        case css::rdf::URIs::RDF_FIRST:
+            ns = s_nsRDF;
+            ln = "first";
+            break;
+
+        case css::rdf::URIs::RDF_REST:
+            ns = s_nsRDF;
+            ln = "rest";
+            break;
+
+        case css::rdf::URIs::RDF_NIL:
+            ns = s_nsRDF;
+            ln = "nil";
+            break;
+
+        case css::rdf::URIs::RDF_XMLLITERAL:
+            ns = s_nsRDF;
+            ln = "XMLLiteral";
+            break;
+
+        case css::rdf::URIs::RDF_ALT:
+            ns = s_nsRDF;
+            ln = "Alt";
+            break;
+
+        case css::rdf::URIs::RDF_BAG:
+            ns = s_nsRDF;
+            ln = "Bag";
+            break;
+
+        case css::rdf::URIs::RDF_LIST:
+            ns = s_nsRDF;
+            ln = "List";
+            break;
+
+        case css::rdf::URIs::RDF_SEQ:
+            ns = s_nsRDF;
+            ln = "Seq";
+            break;
+
+        case css::rdf::URIs::RDF_1:
+            ns = s_nsRDF;
+            ln = "_1";
+            break;
+
+        case css::rdf::URIs::RDFS_COMMENT:
+            ns = s_nsRDFs;
+            ln = "comment";
+            break;
+
+        case css::rdf::URIs::RDFS_LABEL:
+            ns = s_nsRDFs;
+            ln = "label";
+            break;
+
+        case css::rdf::URIs::RDFS_DOMAIN:
+            ns = s_nsRDFs;
+            ln = "domain";
+            break;
+
+        case css::rdf::URIs::RDFS_RANGE:
+            ns = s_nsRDFs;
+            ln = "range";
+            break;
+
+        case css::rdf::URIs::RDFS_SUBCLASSOF:
+            ns = s_nsRDFs;
+            ln = "subClassOf";
+            break;
+
+        case css::rdf::URIs::RDFS_LITERAL:
+            ns = s_nsRDFs;
+            ln = "Literal";
+            break;
+
+        case css::rdf::URIs::OWL_CLASS:
+            ns = s_nsOWL;
+            ln = "Class";
+            break;
+
+        case css::rdf::URIs::OWL_OBJECTPROPERTY:
+            ns = s_nsOWL;
+            ln = "ObjectProperty";
+            break;
+
+        case css::rdf::URIs::OWL_DATATYPEPROPERTY:
+            ns = s_nsOWL;
+            ln = "DatatypeProperty";
+            break;
+
+        case css::rdf::URIs::OWL_FUNCTIONALPROPERTY:
+            ns = s_nsOWL;
+            ln = "FunctionalProperty";
+            break;
+
+        case css::rdf::URIs::OWL_THING:
+            ns = s_nsOWL;
+            ln = "Thing";
+            break;
+
+        case css::rdf::URIs::OWL_NOTHING:
+            ns = s_nsOWL;
+            ln = "Nothing";
+            break;
+
+        case css::rdf::URIs::OWL_INDIVIDUAL:
+            ns = s_nsOWL;
+            ln = "Individual";
+            break;
+
+        case css::rdf::URIs::OWL_EQUIVALENTCLASS:
+            ns = s_nsOWL;
+            ln = "equivalentClass";
+            break;
+
+        case css::rdf::URIs::OWL_EQUIVALENTPROPERTY:
+            ns = s_nsOWL;
+            ln = "equivalentProperty";
+            break;
+
+        case css::rdf::URIs::OWL_SAMEAS:
+            ns = s_nsOWL;
+            ln = "sameAs";
+            break;
+
+        case css::rdf::URIs::OWL_DIFFERENTFROM:
+            ns = s_nsOWL;
+            ln = "differentFrom";
+            break;
+
+        case css::rdf::URIs::OWL_ALLDIFFERENT:
+            ns = s_nsOWL;
+            ln = "AllDifferent";
+            break;
+
+        case css::rdf::URIs::OWL_DISTINCTMEMBERS:
+            ns = s_nsOWL;
+            ln = "distinctMembers";
+            break;
+
+        case css::rdf::URIs::OWL_INVERSEOF:
+            ns = s_nsOWL;
+            ln = "inverseOf";
+            break;
+
+        case css::rdf::URIs::OWL_TRANSITIVEPROPERTY:
+            ns = s_nsOWL;
+            ln = "TransitiveProperty";
+            break;
+
+        case css::rdf::URIs::OWL_SYMMETRICPROPERTY:
+            ns = s_nsOWL;
+            ln = "SymmetricProperty";
+            break;
+
+        case css::rdf::URIs::OWL_INVERSEFUNCTIONALPROPERTY:
+            ns = s_nsOWL;
+            ln = "InverseFunctionalProperty";
+            break;
+
+        case css::rdf::URIs::OWL_RESTRICTION:
+            ns = s_nsOWL;
+            ln = "Restriction";
+            break;
+
+        case css::rdf::URIs::OWL_ONPROPERTY:
+            ns = s_nsOWL;
+            ln = "onProperty";
+            break;
+
+        case css::rdf::URIs::OWL_ALLVALUESFROM:
+            ns = s_nsOWL;
+            ln = "allValuesFrom";
+            break;
+
+        case css::rdf::URIs::OWL_SOMEVALUESFROM:
+            ns = s_nsOWL;
+            ln = "someValuesFrom";
+            break;
+
+        case css::rdf::URIs::OWL_MINCARDINALITY:
+            ns = s_nsOWL;
+            ln = "minCardinality";
+            break;
+
+        case css::rdf::URIs::OWL_MAXCARDINALITY:
+            ns = s_nsOWL;
+            ln = "maxCardinality";
+            break;
+
+        case css::rdf::URIs::OWL_CARDINALITY:
+            ns = s_nsOWL;
+            ln = "cardinality";
+            break;
+
+        case css::rdf::URIs::OWL_ONTOLOGY:
+            ns = s_nsOWL;
+            ln = "Ontology";
+            break;
+
+        case css::rdf::URIs::OWL_IMPORTS:
+            ns = s_nsOWL;
+            ln = "imports";
+            break;
+
+        case css::rdf::URIs::OWL_VERSIONINFO:
+            ns = s_nsOWL;
+            ln = "versionInfo";
+            break;
+
+        case css::rdf::URIs::OWL_PRIORVERSION:
+            ns = s_nsOWL;
+            ln = "priorVersion";
+            break;
+
+        case css::rdf::URIs::OWL_BACKWARDCOMPATIBLEWITH:
+            ns = s_nsOWL;
+            ln = "backwardCompatibleWith";
+            break;
+
+        case css::rdf::URIs::OWL_INCOMPATIBLEWITH:
+            ns = s_nsOWL;
+            ln = "incompatibleWith";
+            break;
+
+        case css::rdf::URIs::OWL_DEPRECATEDCLASS:
+            ns = s_nsOWL;
+            ln = "DeprecatedClass";
+            break;
+
+        case css::rdf::URIs::OWL_DEPRECATEDPROPERTY:
+            ns = s_nsOWL;
+            ln = "DeprecatedProperty";
+            break;
+
+        case css::rdf::URIs::OWL_ANNOTATIONPROPERTY:
+            ns = s_nsOWL;
+            ln = "AnnotationProperty";
+            break;
+
+        case css::rdf::URIs::OWL_ONTOLOGYPROPERTY:
+            ns = s_nsOWL;
+            ln = "OntologyProperty";
+            break;
+
+        case css::rdf::URIs::OWL_ONEOF:
+            ns = s_nsOWL;
+            ln = "oneOf";
+            break;
+
+        case css::rdf::URIs::OWL_DATARANGE:
+            ns = s_nsOWL;
+            ln = "dataRange";
+            break;
+
+        case css::rdf::URIs::OWL_DISJOINTWITH:
+            ns = s_nsOWL;
+            ln = "disjointWith";
+            break;
+
+        case css::rdf::URIs::OWL_UNIONOF:
+            ns = s_nsOWL;
+            ln = "unionOf";
+            break;
+
+        case css::rdf::URIs::OWL_COMPLEMENTOF:
+            ns = s_nsOWL;
+            ln = "complementOf";
+            break;
+
+        case css::rdf::URIs::OWL_INTERSECTIONOF:
+            ns = s_nsOWL;
+            ln = "intersectionOf";
+            break;
+
+        case css::rdf::URIs::OWL_HASVALUE:
+            ns = s_nsOWL;
+            ln = "hasValue";
+            break;
+
+
+        case css::rdf::URIs::PKG_HASPART:
+            ns = s_nsPkg;
+            ln = "hasPart";
+            break;
+
+        case css::rdf::URIs::PKG_MIMETYPE:
+            ns = s_nsPkg;
+            ln = "mimeType";
+            break;
+
+        case css::rdf::URIs::PKG_PACKAGE:
+            ns = s_nsPkg;
+            ln = "Package";
+            break;
+
+        case css::rdf::URIs::PKG_ELEMENT:
+            ns = s_nsPkg;
+            ln = "Element";
+            break;
+
+        case css::rdf::URIs::PKG_FILE:
+            ns = s_nsPkg;
+            ln = "File";
+            break;
+
+        case css::rdf::URIs::PKG_METADATAFILE:
+            ns = s_nsPkg;
+            ln = "MetadataFile";
+            break;
+
+        case css::rdf::URIs::PKG_DOCUMENT:
+            ns = s_nsPkg;
+            ln = "Document";
+            break;
+
+        case css::rdf::URIs::ODF_PREFIX:
+            ns = s_nsODF;
+            ln = "prefix";
+            break;
+
+        case css::rdf::URIs::ODF_SUFFIX:
+            ns = s_nsODF;
+            ln = "suffix";
+            break;
+
+        case css::rdf::URIs::ODF_ELEMENT:
+            ns = s_nsODF;
+            ln = "Element";
+            break;
+
+        case css::rdf::URIs::ODF_CONTENTFILE:
+            ns = s_nsODF;
+            ln = "ContentFile";
+            break;
+
+        case css::rdf::URIs::ODF_STYLESFILE:
+            ns = s_nsODF;
+            ln = "StylesFile";
+            break;
+
+        default:
+            throw css::lang::IllegalArgumentException(
+                "CURI::initialize: invalid URIs constant argument", *this, 0);
+    }
+    m_Namespace = OUString::createFromAscii(ns).intern();
+    m_LocalName = OUString::createFromAscii(ln).intern();
+}
+
+// css::lang::XInitialization:
+void SAL_CALL CURI::initialize(const css::uno::Sequence< css::uno::Any > & aArguments)
+{
+    sal_Int32 len = aArguments.getLength();
+    if ((len < 1) || (len > 2)) {
+        throw css::lang::IllegalArgumentException(
+            "CURI::initialize: must give 1 or 2 argument(s)", *this, 2);
+    }
+
+    sal_Int16 arg(0);
+    OUString arg0;
+    OUString arg1;
+    if (aArguments[0] >>= arg) {
+        // integer argument: constant from rdf::URIs
+        if (len != 1) {
+            throw css::lang::IllegalArgumentException(
+                "CURI::initialize: must give 1 int argument", *this, 1);
+        }
+        initFromConstant(arg);
+        return;
+    }
+    if (!(aArguments[0] >>= arg0)) {
+        throw css::lang::IllegalArgumentException(
+            "CURI::initialize: argument must be string or short", *this, 0);
+    }
+    if (len > 1) {
+        if (!(aArguments[1] >>= arg1)) {
+            throw css::lang::IllegalArgumentException(
+                "CURI::initialize: argument must be string", *this, 1);
+        }
+        // just append the parameters and then split them again; seems simplest
+        arg0 = arg0 + arg1;
+        arg1.clear();
+    }
+
+    // split parameter
+    sal_Int32 idx = arg0.indexOf('#');
+    if (idx < 0)
+        idx = arg0.lastIndexOf('/');
+    if (idx < 0)
+        idx = arg0.lastIndexOf(':');
+    if (idx < 0)
+    {
+        throw css::lang::IllegalArgumentException(
+            "CURI::initialize: argument not splittable: no separator [#/:]", *this, 0);
+    }
+    if (idx < arg0.getLength() - 1) {
+        arg1 = arg0.copy(idx+1);
+        arg0 = arg0.copy(0, idx+1);
+    }
+
+    //FIXME: what is legal?
+    if (arg0.isEmpty()) {
+        throw css::lang::IllegalArgumentException(
+            "CURI::initialize: argument is not valid namespace", *this, 0);
+    }
+    m_Namespace = arg0;
+
+    //FIXME: what is legal?
+    if ((false)) {
+        throw css::lang::IllegalArgumentException(
+            "CURI::initialize: argument is not valid local name", *this, 1);
+    }
+    m_LocalName = arg1;
+}
+
+// css::rdf::XNode:
+OUString SAL_CALL CURI::getStringValue()
+{
+    return m_Namespace + m_LocalName;
+}
+
+// css::rdf::XURI:
+OUString SAL_CALL CURI::getNamespace()
+{
+    return m_Namespace;
+}
+
+OUString SAL_CALL CURI::getLocalName()
+{
+    return m_LocalName;
+}
+
+} // closing anonymous implementation namespace
+
+
+// component helper namespace
+namespace comp_CURI {
+
+OUString _getImplementationName() {
+    return
+        "CURI";
+}
+
+css::uno::Sequence< OUString > _getSupportedServiceNames()
+{
+    css::uno::Sequence< OUString > s { "com.sun.star.rdf.URI" };
+    return s;
+}
+
+css::uno::Reference< css::uno::XInterface > _create(
+    const css::uno::Reference< css::uno::XComponentContext > & )
+{
+    return static_cast< ::cppu::OWeakObject * >(new CURI);
+}
+
+} // closing component helper namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/unoxml/source/rdf/librdf_repository.cxx b/unoxml/source/rdf/librdf_repository.cxx
new file mode 100644
index 000000000..3c14bb405
--- /dev/null
+++ b/unoxml/source/rdf/librdf_repository.cxx
@@ -0,0 +1,2478 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "librdf_repository.hxx"
+
+#include <string.h>
+
+#include <map>
+#include <memory>
+#include <set>
+#include <iterator>
+#include <algorithm>
+#include <atomic>
+
+#include <optional>
+
+#include <libxslt/security.h>
+
+#include <redland.h>
+
+#include <com/sun/star/container/ElementExistException.hpp>
+#include <com/sun/star/datatransfer/UnsupportedFlavorException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/io/XSeekable.hpp>
+#include <com/sun/star/text/XTextRange.hpp>
+#include <com/sun/star/rdf/ParseException.hpp>
+#include <com/sun/star/rdf/QueryException.hpp>
+#include <com/sun/star/rdf/RepositoryException.hpp>
+#include <com/sun/star/rdf/XDocumentRepository.hpp>
+#include <com/sun/star/rdf/XLiteral.hpp>
+#include <com/sun/star/rdf/FileFormat.hpp>
+#include <com/sun/star/rdf/BlankNode.hpp>
+#include <com/sun/star/rdf/URI.hpp>
+#include <com/sun/star/rdf/Literal.hpp>
+
+#include <rtl/ref.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <osl/diagnose.h>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/weakref.hxx>
+
+#include <comphelper/sequence.hxx>
+#include <comphelper/xmltools.hxx>
+
+#include <com/sun/star/embed/XEncryptionProtectedSource2.hpp>
+
+/**
+    Implementation of the service com.sun.star.rdf.Repository.
+
+    This implementation uses the Redland RDF library (librdf).
+
+    There are several classes involved:
+    librdf_TypeConverter:   helper class to convert data types redland <-> uno
+    librdf_Repository:      the main repository, does almost all the work
+    librdf_NamedGraph:      the XNamedGraph, forwards everything to repository
+    librdf_GraphResult:     an XEnumeration<Statement>
+    librdf_QuerySelectResult:   an XEnumeration<sequence<XNode>>
+
+ */
+
+/// anonymous implementation namespace
+namespace {
+
+class librdf_NamedGraph;
+class librdf_Repository;
+
+using namespace ::com::sun::star;
+
+typedef std::map< OUString, ::rtl::Reference<librdf_NamedGraph> >
+    NamedGraphMap_t;
+
+const char s_sparql [] = "sparql";
+const char s_nsOOo  [] = "http://openoffice.org/2004/office/rdfa/";
+
+
+//FIXME: this approach is not ideal. can we use blank nodes instead?
+bool isInternalContext(librdf_node *i_pNode) throw ()
+{
+    OSL_ENSURE(i_pNode, "isInternalContext: context null");
+    OSL_ENSURE(librdf_node_is_resource(i_pNode),
+        "isInternalContext: context not resource");
+    if (i_pNode) {
+        librdf_uri *pURI(librdf_node_get_uri(i_pNode));
+        OSL_ENSURE(pURI, "isInternalContext: URI null");
+        if (pURI) {
+            unsigned char *pContextURI(librdf_uri_as_string(pURI));
+            assert(pContextURI && "isInternalContext: URI string null");
+            // if prefix matches reserved uri, it is RDFa context
+            if (!strncmp(reinterpret_cast<char *>(pContextURI),
+                    s_nsOOo, sizeof(s_nsOOo)-1)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    return true;
+}
+
+
+// n.b.: librdf destructor functions dereference null pointers!
+//       so they need to be wrapped to be usable with std::shared_ptr.
+void safe_librdf_free_world(librdf_world *const world)
+{
+    if (world) { librdf_free_world(world); }
+}
+void safe_librdf_free_model(librdf_model *const model)
+{
+    if (model) { librdf_free_model(model); }
+}
+void safe_librdf_free_node(librdf_node* node)
+{
+    if (node) { librdf_free_node(node); }
+}
+void safe_librdf_free_parser(librdf_parser *const parser)
+{
+    if (parser) { librdf_free_parser(parser); }
+}
+void safe_librdf_free_query(librdf_query *const query)
+{
+    if (query) { librdf_free_query(query); }
+}
+void
+safe_librdf_free_query_results(librdf_query_results *const query_results)
+{
+    if (query_results) { librdf_free_query_results(query_results); }
+}
+void safe_librdf_free_serializer(librdf_serializer *const serializer)
+{
+    if (serializer) { librdf_free_serializer(serializer); }
+}
+void safe_librdf_free_statement(librdf_statement *const statement)
+{
+    if (statement) { librdf_free_statement(statement); }
+}
+void safe_librdf_free_storage(librdf_storage *const storage)
+{
+    if (storage) { librdf_free_storage(storage); }
+}
+void safe_librdf_free_stream(librdf_stream *const stream)
+{
+    if (stream) { librdf_free_stream(stream); }
+}
+void safe_librdf_free_uri(librdf_uri *const uri)
+{
+    if (uri) { librdf_free_uri(uri); }
+}
+
+
+/** converts between librdf types and UNO API types.
+ */
+class librdf_TypeConverter
+{
+public:
+
+    // some wrapper classes to temporarily hold values of UNO XNodes
+    struct Node
+    {
+        virtual ~Node() {}
+    };
+    struct Resource : public Node { };
+    struct URI : public Resource
+    {
+        OString const value;
+        explicit URI(OString const& i_rValue)
+            : value(i_rValue)
+        { }
+    };
+    struct BlankNode : public Resource
+    {
+        OString const value;
+        explicit BlankNode(OString const& i_rValue)
+            : value(i_rValue)
+        { }
+    };
+    struct Literal : public Node
+    {
+        OString const value;
+        OString const language;
+        ::std::optional<OString> const type;
+        Literal(OString const& i_rValue, OString const& i_rLanguage,
+                ::std::optional<OString> const& i_rType)
+            : value(i_rValue)
+            , language(i_rLanguage)
+            , type(i_rType)
+        { }
+    };
+    struct Statement
+    {
+        std::shared_ptr<Resource> const pSubject;
+        std::shared_ptr<URI> const pPredicate;
+        std::shared_ptr<Node> const pObject;
+        Statement(std::shared_ptr<Resource> const& i_pSubject,
+                  std::shared_ptr<URI> const& i_pPredicate,
+                  std::shared_ptr<Node> const& i_pObject)
+            : pSubject(i_pSubject)
+            , pPredicate(i_pPredicate)
+            , pObject(i_pObject)
+        { }
+    };
+
+    librdf_TypeConverter(
+            uno::Reference< uno::XComponentContext > const & i_xContext,
+            librdf_Repository &i_rRep)
+        : m_xContext(i_xContext)
+        , m_rRep(i_rRep)
+    { };
+
+    librdf_world *createWorld_Lock() const;
+    librdf_storage *createStorage_Lock(librdf_world *i_pWorld) const;
+    librdf_model *createModel_Lock(librdf_world *i_pWorld,
+        librdf_storage * i_pStorage) const;
+    static librdf_uri* mkURI_Lock(librdf_world* i_pWorld,
+        const OString & i_rURI);
+    static librdf_node* mkResource_Lock(librdf_world* i_pWorld,
+        const Resource * i_pResource);
+    static librdf_node* mkNode_Lock(librdf_world* i_pWorld,
+        const Node * i_pNode);
+    static librdf_statement* mkStatement_Lock(librdf_world* i_pWorld,
+        Statement const& i_rStatement);
+    static std::shared_ptr<Resource> extractResource_NoLock(
+        const uno::Reference< rdf::XResource > & i_xResource);
+    static void extractResourceToCacheKey_NoLock(
+        const uno::Reference< rdf::XResource > & i_xResource,
+        OUStringBuffer& rBuf);
+    static std::shared_ptr<Node> extractNode_NoLock(
+        const uno::Reference< rdf::XNode > & i_xNode);
+    static void extractNodeToCacheKey_NoLock(
+        const uno::Reference< rdf::XNode > & i_xNode,
+        OUStringBuffer& rBuffer);
+    static Statement extractStatement_NoLock(
+        const uno::Reference< rdf::XResource > & i_xSubject,
+        const uno::Reference< rdf::XURI > & i_xPredicate,
+        const uno::Reference< rdf::XNode > & i_xObject);
+    uno::Reference<rdf::XURI> convertToXURI(librdf_uri* i_pURI) const;
+    uno::Reference<rdf::XURI> convertToXURI(librdf_node* i_pURI) const;
+    uno::Reference<rdf::XResource>
+        convertToXResource(librdf_node* i_pNode) const;
+    uno::Reference<rdf::XNode> convertToXNode(librdf_node* i_pNode) const;
+    rdf::Statement
+        convertToStatement(librdf_statement* i_pStmt, librdf_node* i_pContext)
+        const;
+
+private:
+    uno::Reference< uno::XComponentContext > const m_xContext;
+    librdf_Repository & m_rRep;
+};
+
+
+/** implements the repository service.
+ */
+class librdf_Repository:
+//    private ::cppu::BaseMutex,
+    public ::cppu::WeakImplHelper<
+        lang::XServiceInfo,
+        rdf::XDocumentRepository,
+        lang::XInitialization>
+{
+public:
+
+    explicit librdf_Repository(
+        uno::Reference< uno::XComponentContext > const & i_xContext);
+    virtual ~librdf_Repository() override;
+
+    // css::lang::XServiceInfo:
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(
+            const OUString & ServiceName) override;
+    virtual uno::Sequence< OUString > SAL_CALL
+        getSupportedServiceNames() override;
+
+    // css::rdf::XRepository:
+    virtual uno::Reference< rdf::XBlankNode > SAL_CALL createBlankNode() override;
+    virtual uno::Reference<rdf::XNamedGraph> SAL_CALL importGraph(
+            ::sal_Int16 i_Format,
+            const uno::Reference< io::XInputStream > & i_xInStream,
+            const uno::Reference< rdf::XURI > & i_xGraphName,
+            const uno::Reference< rdf::XURI > & i_xBaseURI) override;
+    virtual void SAL_CALL exportGraph(::sal_Int16 i_Format,
+            const uno::Reference< io::XOutputStream > & i_xOutStream,
+            const uno::Reference< rdf::XURI > & i_xGraphName,
+            const uno::Reference< rdf::XURI > & i_xBaseURI) override;
+    virtual uno::Sequence< uno::Reference< rdf::XURI > > SAL_CALL
+        getGraphNames() override;
+    virtual uno::Reference< rdf::XNamedGraph > SAL_CALL getGraph(
+            const uno::Reference< rdf::XURI > & i_xGraphName) override;
+    virtual uno::Reference< rdf::XNamedGraph > SAL_CALL createGraph(
+            const uno::Reference< rdf::XURI > & i_xGraphName) override;
+    virtual void SAL_CALL destroyGraph(
+            const uno::Reference< rdf::XURI > & i_xGraphName) override;
+    virtual uno::Reference< container::XEnumeration > SAL_CALL getStatements(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Reference< rdf::XURI > & i_xPredicate,
+            const uno::Reference< rdf::XNode > & i_xObject) override;
+    virtual uno::Reference< rdf::XQuerySelectResult > SAL_CALL
+            querySelect(const OUString & i_rQuery) override;
+    virtual uno::Reference< container::XEnumeration > SAL_CALL
+        queryConstruct(const OUString & i_rQuery) override;
+    virtual sal_Bool SAL_CALL queryAsk(const OUString & i_rQuery) override;
+
+    // css::rdf::XDocumentRepository:
+    virtual void SAL_CALL setStatementRDFa(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Sequence< uno::Reference< rdf::XURI > > & i_rPredicates,
+            const uno::Reference< rdf::XMetadatable > & i_xObject,
+            const OUString & i_rRDFaContent,
+            const uno::Reference< rdf::XURI > & i_xRDFaDatatype) override;
+    virtual void SAL_CALL removeStatementRDFa(
+            const uno::Reference< rdf::XMetadatable > & i_xElement) override;
+    virtual beans::Pair< uno::Sequence<rdf::Statement>, sal_Bool > SAL_CALL
+        getStatementRDFa(uno::Reference< rdf::XMetadatable > const& i_xElement) override;
+    virtual uno::Reference< container::XEnumeration > SAL_CALL
+        getStatementsRDFa(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Reference< rdf::XURI > & i_xPredicate,
+            const uno::Reference< rdf::XNode > & i_xObject) override;
+
+    // css::lang::XInitialization:
+    virtual void SAL_CALL initialize(
+            const uno::Sequence< css::uno::Any > & i_rArguments) override;
+
+    // XNamedGraph forwards ---------------------------------------------
+    NamedGraphMap_t::iterator clearGraph_NoLock(
+            const OUString & i_rGraphName,
+            bool i_Internal = false );
+    NamedGraphMap_t::iterator clearGraph_Lock(
+            const OUString & i_rGraphName,
+            bool i_Internal);
+    void addStatementGraph_NoLock(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Reference< rdf::XURI > & i_xPredicate,
+            const uno::Reference< rdf::XNode > & i_xObject,
+            const uno::Reference< rdf::XURI > & i_xName );
+//        throw (uno::RuntimeException, lang::IllegalArgumentException,
+//            container::NoSuchElementException, rdf::RepositoryException);
+    void addStatementGraph_Lock(
+        librdf_TypeConverter::Statement const& i_rStatement,
+        OUString const& i_rGraphName,
+        bool i_Internal);
+    void removeStatementsGraph_NoLock(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Reference< rdf::XURI > & i_xPredicate,
+            const uno::Reference< rdf::XNode > & i_xObject,
+            const uno::Reference< rdf::XURI > & i_xName );
+//        throw (uno::RuntimeException, lang::IllegalArgumentException,
+//            container::NoSuchElementException, rdf::RepositoryException);
+    std::vector<rdf::Statement> getStatementsGraph_NoLock(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Reference< rdf::XURI > & i_xPredicate,
+            const uno::Reference< rdf::XNode > & i_xObject,
+            const uno::Reference< rdf::XURI > & i_xName,
+            bool i_Internal = false );
+//        throw (uno::RuntimeException, lang::IllegalArgumentException,
+//            container::NoSuchElementException, rdf::RepositoryException);
+
+    const librdf_TypeConverter& getTypeConverter() const { return m_TypeConverter; };
+
+private:
+
+    librdf_Repository(librdf_Repository const&) = delete;
+    librdf_Repository& operator=(librdf_Repository const&) = delete;
+
+    /// this is const, no need to lock m_aMutex to access it
+    uno::Reference< uno::XComponentContext > const m_xContext;
+
+    /// librdf global data
+    /** N.B.: The redland documentation gives the impression that you can have
+              as many librdf_worlds as you like. This is true in the same sense
+              that you can physically be in as many places as you like.
+              Well, you can, just not at the same time.
+              The ugly truth is that destroying a librdf_world kills a bunch
+              of static variables; other librdf_worlds become very unhappy
+              when they access these.
+              And of course this is not documented anywhere that I could find.
+              So we allocate a single world, and refcount that.
+     */
+    static std::shared_ptr<librdf_world> m_pWorld;
+    /// refcount
+    static sal_uInt32 m_NumInstances;
+    /// mutex for m_pWorld - redland is not as threadsafe as is often claimed
+    static osl::Mutex m_aMutex;
+
+    // NB: sequence of the shared pointers is important!
+    /// librdf repository storage
+    std::shared_ptr<librdf_storage> m_pStorage;
+    /// librdf repository model
+    std::shared_ptr<librdf_model> m_pModel;
+
+    /// all named graphs
+    NamedGraphMap_t m_NamedGraphs;
+
+    /// type conversion helper - stateless
+    librdf_TypeConverter m_TypeConverter;
+
+    /// set of xml:ids of elements with xhtml:content
+    ::std::set< OUString > m_RDFaXHTMLContentSet;
+};
+
+
+/** result of operations that return a graph, i.e.,
+    an XEnumeration of statements.
+ */
+class librdf_GraphResult:
+    public ::cppu::WeakImplHelper<
+        container::XEnumeration>
+{
+public:
+
+    librdf_GraphResult(librdf_Repository *i_pRepository,
+            ::osl::Mutex & i_rMutex,
+            std::shared_ptr<librdf_stream> const& i_pStream,
+            std::shared_ptr<librdf_node> const& i_pContext,
+            std::shared_ptr<librdf_query>  const& i_pQuery =
+                std::shared_ptr<librdf_query>() )
+        : m_xRep(i_pRepository)
+        , m_rMutex(i_rMutex)
+        , m_pQuery(i_pQuery)
+        , m_pContext(i_pContext)
+        , m_pStream(i_pStream)
+    { };
+
+    virtual ~librdf_GraphResult() override
+    {
+        ::osl::MutexGuard g(m_rMutex); // lock mutex when destroying members
+        const_cast<std::shared_ptr<librdf_stream>& >(m_pStream).reset();
+        const_cast<std::shared_ptr<librdf_node>& >(m_pContext).reset();
+        const_cast<std::shared_ptr<librdf_query>& >(m_pQuery).reset();
+    }
+
+    // css::container::XEnumeration:
+    virtual sal_Bool SAL_CALL hasMoreElements() override;
+    virtual uno::Any SAL_CALL nextElement() override;
+
+private:
+
+    librdf_GraphResult(librdf_GraphResult const&) = delete;
+    librdf_GraphResult& operator=(librdf_GraphResult const&) = delete;
+
+    // NB: this is not a weak pointer: streams _must_ be deleted before the
+    //     storage they point into, so we keep the repository alive here
+    // also, sequence is important: the stream must be destroyed first.
+    ::rtl::Reference< librdf_Repository > m_xRep;
+    // needed for synchronizing access to librdf (it doesn't do win32 threading)
+    ::osl::Mutex & m_rMutex;
+    // the query (in case this is a result of a graph query)
+    // not that the redland documentation spells this out explicitly, but
+    // queries must be freed only after all the results are completely read
+    std::shared_ptr<librdf_query>  const m_pQuery;
+    std::shared_ptr<librdf_node>   const m_pContext;
+    std::shared_ptr<librdf_stream> const m_pStream;
+
+    librdf_node* getContext_Lock() const;
+};
+
+
+// css::container::XEnumeration:
+sal_Bool SAL_CALL
+librdf_GraphResult::hasMoreElements()
+{
+    ::osl::MutexGuard g(m_rMutex);
+    return m_pStream && !librdf_stream_end(m_pStream.get());
+}
+
+librdf_node* librdf_GraphResult::getContext_Lock() const
+{
+    if (!m_pStream || librdf_stream_end(m_pStream.get()))
+        return nullptr;
+    librdf_node *pCtxt(
+#if LIBRDF_VERSION >= 10012
+        librdf_stream_get_context2(m_pStream.get()) );
+#else
+        static_cast<librdf_node *>(librdf_stream_get_context(m_pStream.get())) );
+#endif
+    if (pCtxt)
+        return pCtxt;
+    return m_pContext.get();
+}
+
+css::uno::Any SAL_CALL
+librdf_GraphResult::nextElement()
+{
+    ::osl::MutexGuard g(m_rMutex);
+    if (m_pStream && librdf_stream_end(m_pStream.get())) {
+        throw container::NoSuchElementException();
+    }
+    librdf_node * pCtxt = getContext_Lock();
+
+    librdf_statement *pStmt( librdf_stream_get_object(m_pStream.get()) );
+    if (!pStmt) {
+        rdf::QueryException e(
+            "librdf_GraphResult::nextElement: "
+            "librdf_stream_get_object failed", *this);
+        throw lang::WrappedTargetException(
+            "librdf_GraphResult::nextElement: "
+            "librdf_stream_get_object failed", *this,
+                uno::makeAny(e));
+    }
+    // NB: pCtxt may be null here if this is result of a graph query
+    if (pCtxt && isInternalContext(pCtxt)) {
+        pCtxt = nullptr; // XML ID context is implementation detail!
+    }
+    rdf::Statement Stmt(
+        m_xRep->getTypeConverter().convertToStatement(pStmt, pCtxt) );
+    // NB: this will invalidate current item.
+    librdf_stream_next(m_pStream.get());
+    return uno::makeAny(Stmt);
+}
+
+
+/** result of operations that return a graph, i.e.,
+    an XEnumeration of statements.
+ */
+class librdf_GraphResult2:
+    public ::cppu::WeakImplHelper<
+        container::XEnumeration>
+{
+public:
+
+    librdf_GraphResult2(std::vector<rdf::Statement> statements)
+        : m_vStatements(std::move(statements))
+    { };
+
+    // css::container::XEnumeration:
+    virtual sal_Bool SAL_CALL hasMoreElements() override;
+    virtual uno::Any SAL_CALL nextElement() override;
+
+private:
+
+    std::vector<rdf::Statement> m_vStatements;
+    std::atomic<std::size_t> m_nIndex = 0;
+};
+
+
+// css::container::XEnumeration:
+sal_Bool SAL_CALL
+librdf_GraphResult2::hasMoreElements()
+{
+    return m_nIndex < m_vStatements.size();
+}
+
+css::uno::Any SAL_CALL
+librdf_GraphResult2::nextElement()
+{
+    std::size_t const n = m_nIndex++;
+    if (m_vStatements.size() <= n)
+    {
+        m_nIndex = m_vStatements.size(); // avoid overflow
+        throw container::NoSuchElementException();
+    }
+    return uno::makeAny(m_vStatements[n]);
+}
+
+/** result of tuple queries ("SELECT").
+ */
+class librdf_QuerySelectResult:
+    public ::cppu::WeakImplHelper<
+        rdf::XQuerySelectResult>
+{
+public:
+
+    librdf_QuerySelectResult(librdf_Repository *i_pRepository,
+            ::osl::Mutex & i_rMutex,
+            std::shared_ptr<librdf_query>  const& i_pQuery,
+            std::shared_ptr<librdf_query_results> const& i_pQueryResult,
+            uno::Sequence< OUString > const& i_rBindingNames )
+        : m_xRep(i_pRepository)
+        , m_rMutex(i_rMutex)
+        , m_pQuery(i_pQuery)
+        , m_pQueryResult(i_pQueryResult)
+        , m_BindingNames(i_rBindingNames)
+    { };
+
+    virtual ~librdf_QuerySelectResult() override
+    {
+        ::osl::MutexGuard g(m_rMutex); // lock mutex when destroying members
+        const_cast<std::shared_ptr<librdf_query_results>& >(m_pQueryResult)
+            .reset();
+        const_cast<std::shared_ptr<librdf_query>& >(m_pQuery).reset();
+    }
+
+    // css::container::XEnumeration:
+    virtual sal_Bool SAL_CALL hasMoreElements() override;
+    virtual uno::Any SAL_CALL nextElement() override;
+
+    // css::rdf::XQuerySelectResult:
+    virtual uno::Sequence< OUString > SAL_CALL getBindingNames() override;
+
+private:
+
+    librdf_QuerySelectResult(librdf_QuerySelectResult const&) = delete;
+    librdf_QuerySelectResult& operator=(librdf_QuerySelectResult const&) = delete;
+
+    // NB: this is not a weak pointer: streams _must_ be deleted before the
+    //     storage they point into, so we keep the repository alive here
+    // also, sequence is important: the stream must be destroyed first.
+    ::rtl::Reference< librdf_Repository > m_xRep;
+    // needed for synchronizing access to librdf (it doesn't do win32 threading)
+    ::osl::Mutex & m_rMutex;
+    // not that the redland documentation spells this out explicitly, but
+    // queries must be freed only after all the results are completely read
+    std::shared_ptr<librdf_query> const m_pQuery;
+    std::shared_ptr<librdf_query_results> const m_pQueryResult;
+    uno::Sequence< OUString > const m_BindingNames;
+};
+
+
+// css::container::XEnumeration:
+sal_Bool SAL_CALL
+librdf_QuerySelectResult::hasMoreElements()
+{
+    ::osl::MutexGuard g(m_rMutex);
+    return !librdf_query_results_finished(m_pQueryResult.get());
+}
+
+class NodeArray : private std::vector<librdf_node*>
+{
+public:
+    NodeArray(int cnt) : std::vector<librdf_node*>(cnt) {}
+
+    ~NodeArray() throw ()
+    {
+        std::for_each(begin(), end(), safe_librdf_free_node);
+    }
+
+    using std::vector<librdf_node*>::data;
+    using std::vector<librdf_node*>::operator[];
+};
+
+css::uno::Any SAL_CALL
+librdf_QuerySelectResult::nextElement()
+{
+    ::osl::MutexGuard g(m_rMutex);
+    if (librdf_query_results_finished(m_pQueryResult.get())) {
+        throw container::NoSuchElementException();
+    }
+    sal_Int32 count(m_BindingNames.getLength());
+    OSL_ENSURE(count >= 0, "negative length?");
+    NodeArray aNodes(count);
+    if (librdf_query_results_get_bindings(m_pQueryResult.get(), nullptr,
+                aNodes.data()))
+    {
+        rdf::QueryException e(
+            "librdf_QuerySelectResult::nextElement: "
+            "librdf_query_results_get_bindings failed", *this);
+        throw lang::WrappedTargetException(
+            "librdf_QuerySelectResult::nextElement: "
+            "librdf_query_results_get_bindings failed", *this,
+            uno::makeAny(e));
+    }
+    uno::Sequence< uno::Reference< rdf::XNode > > ret(count);
+    for (int i = 0; i < count; ++i) {
+        ret[i] = m_xRep->getTypeConverter().convertToXNode(aNodes[i]);
+    }
+    // NB: this will invalidate current item.
+    librdf_query_results_next(m_pQueryResult.get());
+    return uno::makeAny(ret);
+}
+
+// css::rdf::XQuerySelectResult:
+uno::Sequence< OUString > SAL_CALL
+librdf_QuerySelectResult::getBindingNames()
+{
+    // const - no lock needed
+    return m_BindingNames;
+}
+
+
+/** represents a named graph, and forwards all the work to repository.
+ */
+class librdf_NamedGraph:
+    public ::cppu::WeakImplHelper<
+        rdf::XNamedGraph>
+{
+public:
+    librdf_NamedGraph(librdf_Repository * i_pRep,
+            uno::Reference<rdf::XURI> const & i_xName)
+        : m_wRep(i_pRep)
+        , m_pRep(i_pRep)
+        , m_xName(i_xName)
+    { };
+
+    // css::rdf::XNode:
+    virtual OUString SAL_CALL getStringValue() override;
+
+    // css::rdf::XURI:
+    virtual OUString SAL_CALL getNamespace() override;
+    virtual OUString SAL_CALL getLocalName() override;
+
+    // css::rdf::XNamedGraph:
+    virtual uno::Reference<rdf::XURI> SAL_CALL getName() override;
+    virtual void SAL_CALL clear() override;
+    virtual void SAL_CALL addStatement(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Reference< rdf::XURI > & i_xPredicate,
+            const uno::Reference< rdf::XNode > & i_xObject) override;
+    virtual void SAL_CALL removeStatements(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Reference< rdf::XURI > & i_xPredicate,
+            const uno::Reference< rdf::XNode > & i_xObject) override;
+    virtual uno::Reference< container::XEnumeration > SAL_CALL getStatements(
+            const uno::Reference< rdf::XResource > & i_xSubject,
+            const uno::Reference< rdf::XURI > & i_xPredicate,
+            const uno::Reference< rdf::XNode > & i_xObject) override;
+
+private:
+
+    librdf_NamedGraph(librdf_NamedGraph const&) = delete;
+    librdf_NamedGraph& operator=(librdf_NamedGraph const&) = delete;
+
+    static OUString createCacheKey_NoLock(
+        const uno::Reference< rdf::XResource > & i_xSubject,
+        const uno::Reference< rdf::XURI > & i_xPredicate,
+        const uno::Reference< rdf::XNode > & i_xObject);
+
+    /// weak reference: this is needed to check if m_pRep is valid
+    uno::WeakReference< rdf::XRepository > const m_wRep;
+    librdf_Repository *const m_pRep;
+    uno::Reference< rdf::XURI > const m_xName;
+
+    /// Querying is rather slow, so cache the results.
+    std::map<OUString, std::vector<rdf::Statement>> m_aStatementsCache;
+    ::osl::Mutex m_CacheMutex;
+};
+
+
+// css::rdf::XNode:
+OUString SAL_CALL librdf_NamedGraph::getStringValue()
+{
+    return m_xName->getStringValue();
+}
+
+// css::rdf::XURI:
+OUString SAL_CALL librdf_NamedGraph::getNamespace()
+{
+    return m_xName->getNamespace();
+}
+
+OUString SAL_CALL librdf_NamedGraph::getLocalName()
+{
+    return m_xName->getLocalName();
+}
+
+// css::rdf::XNamedGraph:
+uno::Reference< rdf::XURI > SAL_CALL librdf_NamedGraph::getName()
+{
+    return m_xName;
+}
+
+void SAL_CALL librdf_NamedGraph::clear()
+{
+    uno::Reference< rdf::XRepository > xRep( m_wRep );
+    if (!xRep.is()) {
+        throw rdf::RepositoryException(
+            "librdf_NamedGraph::clear: repository is gone", *this);
+    }
+    const OUString contextU( m_xName->getStringValue() );
+    try {
+        m_pRep->clearGraph_NoLock(contextU);
+    } catch (lang::IllegalArgumentException & ex) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw lang::WrappedTargetRuntimeException( ex.Message,
+                        *this, anyEx );
+    }
+    ::osl::MutexGuard g(m_CacheMutex);
+    m_aStatementsCache.clear();
+}
+
+void SAL_CALL librdf_NamedGraph::addStatement(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject)
+{
+    uno::Reference< rdf::XRepository > xRep( m_wRep );
+    if (!xRep.is()) {
+        throw rdf::RepositoryException(
+            "librdf_NamedGraph::addStatement: repository is gone", *this);
+    }
+    {
+        ::osl::MutexGuard g(m_CacheMutex);
+        m_aStatementsCache.clear();
+    }
+    m_pRep->addStatementGraph_NoLock(
+            i_xSubject, i_xPredicate, i_xObject, m_xName);
+}
+
+void SAL_CALL librdf_NamedGraph::removeStatements(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject)
+{
+    uno::Reference< rdf::XRepository > xRep( m_wRep );
+    if (!xRep.is()) {
+        throw rdf::RepositoryException(
+            "librdf_NamedGraph::removeStatements: repository is gone", *this);
+    }
+    {
+        ::osl::MutexGuard g(m_CacheMutex);
+        m_aStatementsCache.clear();
+    }
+    m_pRep->removeStatementsGraph_NoLock(
+            i_xSubject, i_xPredicate, i_xObject, m_xName);
+}
+
+OUString librdf_NamedGraph::createCacheKey_NoLock(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject)
+{
+    OUStringBuffer cacheKey(256);
+    librdf_TypeConverter::extractResourceToCacheKey_NoLock(i_xSubject, cacheKey);
+    cacheKey.append("\t");
+    librdf_TypeConverter::extractResourceToCacheKey_NoLock(i_xPredicate, cacheKey);
+    cacheKey.append("\t");
+    librdf_TypeConverter::extractNodeToCacheKey_NoLock(i_xObject, cacheKey);
+    return cacheKey.makeStringAndClear();
+}
+
+uno::Reference< container::XEnumeration > SAL_CALL
+librdf_NamedGraph::getStatements(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject)
+{
+    OUString cacheKey = createCacheKey_NoLock(i_xSubject, i_xPredicate, i_xObject);
+    {
+        ::osl::MutexGuard g(m_CacheMutex);
+        auto it = m_aStatementsCache.find(cacheKey);
+        if (it != m_aStatementsCache.end()) {
+            return new librdf_GraphResult2(it->second);
+        }
+    }
+
+    uno::Reference< rdf::XRepository > xRep( m_wRep );
+    if (!xRep.is()) {
+        throw rdf::RepositoryException(
+            "librdf_NamedGraph::getStatements: repository is gone", *this);
+    }
+    std::vector<rdf::Statement> vStatements = m_pRep->getStatementsGraph_NoLock(
+            i_xSubject, i_xPredicate, i_xObject, m_xName);
+
+    {
+        ::osl::MutexGuard g(m_CacheMutex);
+        m_aStatementsCache.emplace(cacheKey, vStatements);
+    }
+    return new librdf_GraphResult2(vStatements);
+}
+
+
+std::shared_ptr<librdf_world> librdf_Repository::m_pWorld;
+sal_uInt32 librdf_Repository::m_NumInstances = 0;
+osl::Mutex librdf_Repository::m_aMutex;
+
+librdf_Repository::librdf_Repository(
+        uno::Reference< uno::XComponentContext > const & i_xContext)
+    : /*BaseMutex(),*/ m_xContext(i_xContext)
+//    m_pWorld  (static_cast<librdf_world  *>(0), safe_librdf_free_world  ),
+    , m_pStorage(static_cast<librdf_storage*>(nullptr), safe_librdf_free_storage)
+    , m_pModel  (static_cast<librdf_model  *>(nullptr), safe_librdf_free_model  )
+    , m_NamedGraphs()
+    , m_TypeConverter(i_xContext, *this)
+{
+    OSL_ENSURE(i_xContext.is(), "librdf_Repository: null context");
+
+    ::osl::MutexGuard g(m_aMutex);
+    if (!m_NumInstances++) {
+        m_pWorld.reset(m_TypeConverter.createWorld_Lock(),
+                safe_librdf_free_world);
+    }
+}
+
+librdf_Repository::~librdf_Repository()
+{
+    ::osl::MutexGuard g(m_aMutex);
+
+    // must destroy these before world!
+    m_pModel.reset();
+    m_pStorage.reset();
+
+    // FIXME: so it turns out that calling librdf_free_world will
+    //   (via raptor_sax2_finish) call xmlCleanupParser, which will
+    //   free libxml2's globals! ARRRGH!!! => never call librdf_free_world
+#if 0
+    if (!--m_NumInstances) {
+        m_pWorld.reset();
+    }
+#endif
+}
+
+// com.sun.star.uno.XServiceInfo:
+OUString SAL_CALL librdf_Repository::getImplementationName()
+{
+    return comp_librdf_Repository::_getImplementationName();
+}
+
+sal_Bool SAL_CALL librdf_Repository::supportsService(
+    OUString const & serviceName)
+{
+    return cppu::supportsService(this, serviceName);
+}
+
+uno::Sequence< OUString > SAL_CALL
+librdf_Repository::getSupportedServiceNames()
+{
+    return comp_librdf_Repository::_getSupportedServiceNames();
+}
+
+// css::rdf::XRepository:
+uno::Reference< rdf::XBlankNode > SAL_CALL librdf_Repository::createBlankNode()
+{
+    ::osl::MutexGuard g(m_aMutex);
+    const std::shared_ptr<librdf_node> pNode(
+        librdf_new_node_from_blank_identifier(m_pWorld.get(), nullptr),
+        safe_librdf_free_node);
+    if (!pNode) {
+        throw uno::RuntimeException(
+            "librdf_Repository::createBlankNode: "
+            "librdf_new_node_from_blank_identifier failed", *this);
+    }
+    const unsigned char * id (librdf_node_get_blank_identifier(pNode.get()));
+    if (!id) {
+        throw uno::RuntimeException(
+            "librdf_Repository::createBlankNode: "
+            "librdf_node_get_blank_identifier failed", *this);
+    }
+    const OUString nodeID(OUString::createFromAscii(
+        reinterpret_cast<const char *>(id)));
+    try {
+        return rdf::BlankNode::create(m_xContext, nodeID);
+    } catch (const lang::IllegalArgumentException &) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw lang::WrappedTargetRuntimeException(
+                "librdf_Repository::createBlankNode: "
+                "illegal blank node label", *this, anyEx);
+    }
+}
+
+//void SAL_CALL
+uno::Reference<rdf::XNamedGraph> SAL_CALL
+librdf_Repository::importGraph(::sal_Int16 i_Format,
+    const uno::Reference< io::XInputStream > & i_xInStream,
+    const uno::Reference< rdf::XURI > & i_xGraphName,
+    const uno::Reference< rdf::XURI > & i_xBaseURI)
+{
+    if (!i_xInStream.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::importGraph: stream is null", *this, 1);
+    }
+    //FIXME: other formats
+    if (i_Format != rdf::FileFormat::RDF_XML) {
+        throw datatransfer::UnsupportedFlavorException(
+                "librdf_Repository::importGraph: file format not supported", *this);
+    }
+    if (!i_xGraphName.is()) {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::importGraph: graph name is null", *this, 2);
+    }
+    if (i_xGraphName->getStringValue().startsWith(s_nsOOo))
+    {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::importGraph: URI is reserved", *this, 0);
+    }
+    if (!i_xBaseURI.is()) { //FIXME: any i_Format that don't need a base URI?
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::importGraph: base URI is null", *this, 3);
+    }
+    OSL_ENSURE(i_xBaseURI.is(), "no base uri");
+    const OUString baseURIU( i_xBaseURI->getStringValue() );
+    if (baseURIU.indexOf('#') >= 0) {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::importGraph: base URI is not absolute", *this, 3);
+    }
+
+    const OUString contextU( i_xGraphName->getStringValue() );
+
+    uno::Sequence<sal_Int8> buf;
+    uno::Reference<io::XSeekable> xSeekable(i_xInStream, uno::UNO_QUERY);
+    // UGLY: if only redland could read streams...
+    const sal_Int64 sz( xSeekable.is() ? xSeekable->getLength() : 1 << 20 );
+    // exceptions are propagated
+    i_xInStream->readBytes( buf, static_cast<sal_Int32>( sz ) );
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    if (m_NamedGraphs.find(contextU) != m_NamedGraphs.end()) {
+        throw container::ElementExistException(
+                "librdf_Repository::importGraph: graph with given URI exists", *this);
+    }
+    const OString context(
+        OUStringToOString(contextU, RTL_TEXTENCODING_UTF8) );
+
+    const std::shared_ptr<librdf_node> pContext(
+        librdf_new_node_from_uri_string(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> (context.getStr())),
+        safe_librdf_free_node);
+    if (!pContext) {
+        throw uno::RuntimeException(
+            "librdf_Repository::importGraph: librdf_new_node_from_uri_string failed", *this);
+    }
+
+    const OString baseURI(
+        OUStringToOString(baseURIU, RTL_TEXTENCODING_UTF8) );
+    const std::shared_ptr<librdf_uri> pBaseURI(
+        librdf_new_uri(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> (baseURI.getStr())),
+        safe_librdf_free_uri);
+    if (!pBaseURI) {
+        throw uno::RuntimeException( "librdf_Repository::importGraph: librdf_new_uri failed", *this);
+    }
+
+    const std::shared_ptr<librdf_parser> pParser(
+        librdf_new_parser(m_pWorld.get(), "rdfxml", nullptr, nullptr),
+        safe_librdf_free_parser);
+    if (!pParser) {
+        throw uno::RuntimeException(
+                "librdf_Repository::importGraph: "
+                "librdf_new_parser failed", *this);
+    }
+
+    const std::shared_ptr<librdf_stream> pStream(
+        librdf_parser_parse_counted_string_as_stream(pParser.get(),
+            reinterpret_cast<const unsigned char*>(buf.getConstArray()),
+            buf.getLength(), pBaseURI.get()),
+        safe_librdf_free_stream);
+    if (!pStream) {
+        throw rdf::ParseException(
+            "librdf_Repository::importGraph: "
+            "librdf_parser_parse_counted_string_as_stream failed", *this);
+    }
+    rtl::Reference<librdf_NamedGraph> const pGraph(
+        new librdf_NamedGraph(this, i_xGraphName));
+    m_NamedGraphs.insert(std::make_pair(contextU, pGraph));
+    if (librdf_model_context_add_statements(m_pModel.get(),
+            pContext.get(), pStream.get())) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::importGraph: "
+            "librdf_model_context_add_statements failed", *this);
+    }
+
+    return uno::Reference<rdf::XNamedGraph>(pGraph.get());
+}
+
+void addChaffWhenEncryptedStorage(const uno::Reference< io::XOutputStream > &rStream, unsigned char* pBuffer, size_t length)
+{
+    if (!length)
+        return;
+
+    uno::Reference< embed::XEncryptionProtectedSource2 > xEncr(rStream,
+        uno::UNO_QUERY);
+
+    bool bAddChaff = xEncr.is() && xEncr->hasEncryptionData();
+
+    // exceptions are propagated
+    if (!bAddChaff)
+    {
+        const uno::Sequence<sal_Int8> buf(
+            reinterpret_cast<sal_Int8*>(pBuffer), length);
+        rStream->writeBytes(buf);
+    }
+    else
+    {
+        unsigned char *postcomment =
+            reinterpret_cast<unsigned char*>(strchr(reinterpret_cast<char*>(pBuffer), '\n'));
+        if (postcomment != nullptr)
+        {
+            ++postcomment;
+
+            size_t preamblelen = postcomment - pBuffer;
+
+            uno::Sequence<sal_Int8> buf(
+                reinterpret_cast<sal_Int8*>(pBuffer), preamblelen);
+            rStream->writeBytes(buf);
+
+            OStringBuffer aComment;
+            aComment.append("<!--");
+            aComment.append(comphelper::xml::makeXMLChaff());
+            aComment.append("-->");
+
+            buf = uno::Sequence<sal_Int8>(
+                reinterpret_cast<const sal_Int8*>(aComment.getStr()), aComment.getLength());
+            rStream->writeBytes(buf);
+
+            buf = uno::Sequence<sal_Int8>(
+                reinterpret_cast<sal_Int8*>(postcomment), length-preamblelen);
+            rStream->writeBytes(buf);
+        }
+    }
+}
+
+void SAL_CALL
+librdf_Repository::exportGraph(::sal_Int16 i_Format,
+    const uno::Reference< io::XOutputStream > & i_xOutStream,
+    const uno::Reference< rdf::XURI > & i_xGraphName,
+    const uno::Reference< rdf::XURI > & i_xBaseURI)
+{
+    if (!i_xOutStream.is()) {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::exportGraph: stream is null", *this, 1);
+    }
+    // FIXME: other formats
+    if (i_Format != rdf::FileFormat::RDF_XML) {
+        throw datatransfer::UnsupportedFlavorException(
+                "librdf_Repository::exportGraph: "
+                "file format not supported", *this);
+    }
+    if (!i_xGraphName.is()) {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::exportGraph: "
+                "graph name is null", *this, 2);
+    }
+    if (!i_xBaseURI.is()) { //FIXME: any i_Format that don't need a base URI?
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::exportGraph: "
+                "base URI is null", *this, 3);
+    }
+    OSL_ENSURE(i_xBaseURI.is(), "no base uri");
+    const OUString baseURIU( i_xBaseURI->getStringValue() );
+    if (baseURIU.indexOf('#') >= 0) {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::exportGraph: "
+                "base URI is not absolute", *this, 3);
+    }
+
+    const OUString contextU( i_xGraphName->getStringValue() );
+
+    ::osl::ClearableMutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    if (m_NamedGraphs.find(contextU) == m_NamedGraphs.end()) {
+        throw container::NoSuchElementException(
+                "librdf_Repository::exportGraph: "
+                "no graph with given URI exists", *this);
+    }
+    const OString context(
+        OUStringToOString(contextU, RTL_TEXTENCODING_UTF8) );
+
+    const std::shared_ptr<librdf_node> pContext(
+        librdf_new_node_from_uri_string(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> (context.getStr())),
+        safe_librdf_free_node);
+    if (!pContext) {
+        throw uno::RuntimeException(
+            "librdf_Repository::exportGraph: "
+            "librdf_new_node_from_uri_string failed", *this);
+    }
+    const OString baseURI(
+        OUStringToOString(baseURIU, RTL_TEXTENCODING_UTF8) );
+    const std::shared_ptr<librdf_uri> pBaseURI(
+        librdf_new_uri(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> (baseURI.getStr())),
+        safe_librdf_free_uri);
+    if (!pBaseURI) {
+        throw uno::RuntimeException(
+            "librdf_Repository::exportGraph: "
+            "librdf_new_uri failed", *this);
+    }
+
+    const std::shared_ptr<librdf_stream> pStream(
+        librdf_model_context_as_stream(m_pModel.get(), pContext.get()),
+        safe_librdf_free_stream);
+    if (!pStream) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::exportGraph: "
+            "librdf_model_context_as_stream failed", *this);
+    }
+    const char * const format("rdfxml");
+    // #i116443#: abbrev breaks when certain URIs are used as data types
+//    const char *format("rdfxml-abbrev");
+    const std::shared_ptr<librdf_serializer> pSerializer(
+        librdf_new_serializer(m_pWorld.get(), format, nullptr, nullptr),
+        safe_librdf_free_serializer);
+    if (!pSerializer) {
+        throw uno::RuntimeException(
+            "librdf_Repository::exportGraph: "
+            "librdf_new_serializer failed", *this);
+    }
+
+    const std::shared_ptr<librdf_uri> pRelativeURI(
+        librdf_new_uri(m_pWorld.get(), reinterpret_cast<const unsigned char*>
+                ("http://feature.librdf.org/raptor-relativeURIs")),
+                 safe_librdf_free_uri);
+    const std::shared_ptr<librdf_uri> pWriteBaseURI(
+        librdf_new_uri(m_pWorld.get(), reinterpret_cast<const unsigned char*>
+            ("http://feature.librdf.org/raptor-writeBaseURI")),
+             safe_librdf_free_uri);
+    const std::shared_ptr<librdf_node> p0(
+        librdf_new_node_from_literal(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> ("0"), nullptr, 0),
+        safe_librdf_free_node);
+    const std::shared_ptr<librdf_node> p1(
+        librdf_new_node_from_literal(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> ("1"), nullptr, 0),
+        safe_librdf_free_node);
+    if (!pWriteBaseURI || !pRelativeURI || !p0 || !p1) {
+        throw uno::RuntimeException(
+            "librdf_Repository::exportGraph: "
+            "librdf_new_uri or librdf_new_node_from_literal failed", *this);
+    }
+
+    // make URIs relative to base URI
+    if (librdf_serializer_set_feature(pSerializer.get(),
+        pRelativeURI.get(), p1.get()))
+    {
+        throw uno::RuntimeException(
+            "librdf_Repository::exportGraph: "
+            "librdf_serializer_set_feature relativeURIs failed", *this);
+    }
+    // but do not write the base URI to the file!
+    if (librdf_serializer_set_feature(pSerializer.get(),
+        pWriteBaseURI.get(), p0.get()))
+    {
+        throw uno::RuntimeException(
+            "librdf_Repository::exportGraph: "
+            "librdf_serializer_set_feature writeBaseURI failed", *this);
+    }
+
+    size_t length;
+    const std::shared_ptr<unsigned char> pBuf(
+        librdf_serializer_serialize_stream_to_counted_string(
+            pSerializer.get(), pBaseURI.get(), pStream.get(), &length), free);
+    if (!pBuf) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::exportGraph: "
+            "librdf_serializer_serialize_stream_to_counted_string failed",
+            *this);
+    }
+
+    g.clear(); // release Mutex before calling i_xOutStream methods
+
+    addChaffWhenEncryptedStorage(i_xOutStream, pBuf.get(), length);
+}
+
+uno::Sequence< uno::Reference< rdf::XURI > > SAL_CALL
+librdf_Repository::getGraphNames()
+{
+    ::osl::MutexGuard g(m_aMutex);
+    ::std::vector< uno::Reference<rdf::XURI> > ret;
+    std::transform(m_NamedGraphs.begin(), m_NamedGraphs.end(),
+        std::back_inserter(ret),
+        [](std::pair<OUString, ::rtl::Reference<librdf_NamedGraph>> const& it)
+            { return it.second->getName(); });
+    return comphelper::containerToSequence(ret);
+}
+
+uno::Reference< rdf::XNamedGraph > SAL_CALL
+librdf_Repository::getGraph(const uno::Reference< rdf::XURI > & i_xGraphName)
+{
+    if (!i_xGraphName.is()) {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::getGraph: URI is null", *this, 0);
+    }
+    const OUString contextU( i_xGraphName->getStringValue() );
+
+    ::osl::MutexGuard g(m_aMutex);
+    const NamedGraphMap_t::iterator iter( m_NamedGraphs.find(contextU) );
+    if (iter != m_NamedGraphs.end()) {
+        return uno::Reference<rdf::XNamedGraph>(iter->second.get());
+    } else {
+        return nullptr;
+    }
+}
+
+uno::Reference< rdf::XNamedGraph > SAL_CALL
+librdf_Repository::createGraph(const uno::Reference< rdf::XURI > & i_xGraphName)
+{
+    if (!i_xGraphName.is()) {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::createGraph: URI is null", *this, 0);
+    }
+
+    const OUString contextU( i_xGraphName->getStringValue() );
+    if (contextU.startsWith(s_nsOOo))
+    {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::createGraph: URI is reserved", *this, 0);
+    }
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    // NB: librdf does not have a concept of graphs as such;
+    //     a librdf named graph exists iff the model contains a statement with
+    //     the graph name as context
+
+    if (m_NamedGraphs.find(contextU) != m_NamedGraphs.end()) {
+        throw container::ElementExistException(
+                "librdf_Repository::createGraph: graph with given URI exists", *this);
+    }
+    m_NamedGraphs.insert(std::make_pair(contextU,
+        new librdf_NamedGraph(this, i_xGraphName)));
+    return uno::Reference<rdf::XNamedGraph>(
+        m_NamedGraphs.find(contextU)->second.get());
+}
+
+void SAL_CALL
+librdf_Repository::destroyGraph(
+        const uno::Reference< rdf::XURI > & i_xGraphName)
+{
+    if (!i_xGraphName.is()) {
+        throw lang::IllegalArgumentException(
+                "librdf_Repository::destroyGraph: URI is null", *this, 0);
+    }
+    const OUString contextU( i_xGraphName->getStringValue() );
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    const NamedGraphMap_t::iterator iter( clearGraph_Lock(contextU, false) );
+    m_NamedGraphs.erase(iter);
+}
+
+bool isMetadatableWithoutMetadata(
+    uno::Reference<uno::XInterface> const & i_xNode)
+{
+    const uno::Reference<rdf::XMetadatable> xMeta( i_xNode, uno::UNO_QUERY );
+    return (xMeta.is() && xMeta->getMetadataReference().Second.isEmpty());
+}
+
+uno::Reference< container::XEnumeration > SAL_CALL
+librdf_Repository::getStatements(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject)
+{
+    if (isMetadatableWithoutMetadata(i_xSubject)   ||
+        isMetadatableWithoutMetadata(i_xPredicate) ||
+        isMetadatableWithoutMetadata(i_xObject))
+    {
+        return new librdf_GraphResult(this, m_aMutex,
+            std::shared_ptr<librdf_stream>(),
+            std::shared_ptr<librdf_node>());
+    }
+
+    librdf_TypeConverter::Statement const stmt(
+        librdf_TypeConverter::extractStatement_NoLock(
+            i_xSubject, i_xPredicate, i_xObject));
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    const std::shared_ptr<librdf_statement> pStatement(
+        librdf_TypeConverter::mkStatement_Lock(m_pWorld.get(), stmt),
+        safe_librdf_free_statement);
+    OSL_ENSURE(pStatement, "mkStatement failed");
+
+    const std::shared_ptr<librdf_stream> pStream(
+        librdf_model_find_statements(m_pModel.get(), pStatement.get()),
+        safe_librdf_free_stream);
+    if (!pStream) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::getStatements: "
+            "librdf_model_find_statements failed", *this);
+    }
+
+    return new librdf_GraphResult(this, m_aMutex, pStream,
+        std::shared_ptr<librdf_node>());
+}
+
+
+uno::Reference< rdf::XQuerySelectResult > SAL_CALL
+librdf_Repository::querySelect(const OUString & i_rQuery)
+{
+    ::osl::MutexGuard g(m_aMutex);
+    const OString query(
+        OUStringToOString(i_rQuery, RTL_TEXTENCODING_UTF8) );
+    const std::shared_ptr<librdf_query> pQuery(
+        librdf_new_query(m_pWorld.get(), s_sparql, nullptr,
+            reinterpret_cast<const unsigned char*> (query.getStr()), nullptr),
+        safe_librdf_free_query);
+    if (!pQuery) {
+        throw rdf::QueryException(
+            "librdf_Repository::querySelect: "
+            "librdf_new_query failed", *this);
+    }
+    const std::shared_ptr<librdf_query_results> pResults(
+        librdf_model_query_execute(m_pModel.get(), pQuery.get()),
+        safe_librdf_free_query_results);
+    if (!pResults || !librdf_query_results_is_bindings(pResults.get())) {
+        throw rdf::QueryException(
+            "librdf_Repository::querySelect: "
+            "query result is null or not bindings", *this);
+    }
+
+    const int count( librdf_query_results_get_bindings_count(pResults.get()) );
+    if (count < 0) {
+        throw rdf::QueryException(
+            "librdf_Repository::querySelect: "
+            "librdf_query_results_get_bindings_count failed", *this);
+    }
+    uno::Sequence< OUString > names(count);
+    for (int i = 0; i < count; ++i) {
+        const char* name( librdf_query_results_get_binding_name(
+            pResults.get(), i) );
+        if (!name) {
+            throw rdf::QueryException(
+                "librdf_Repository::querySelect: binding is null", *this);
+        }
+
+        names[i] = OUString::createFromAscii(name);
+    }
+
+    return new librdf_QuerySelectResult(this, m_aMutex,
+        pQuery, pResults, names);
+}
+
+uno::Reference< container::XEnumeration > SAL_CALL
+librdf_Repository::queryConstruct(const OUString & i_rQuery)
+{
+    ::osl::MutexGuard g(m_aMutex);
+    const OString query(
+        OUStringToOString(i_rQuery, RTL_TEXTENCODING_UTF8) );
+    const std::shared_ptr<librdf_query> pQuery(
+        librdf_new_query(m_pWorld.get(), s_sparql, nullptr,
+            reinterpret_cast<const unsigned char*> (query.getStr()), nullptr),
+        safe_librdf_free_query);
+    if (!pQuery) {
+        throw rdf::QueryException(
+            "librdf_Repository::queryConstruct: "
+            "librdf_new_query failed", *this);
+    }
+    const std::shared_ptr<librdf_query_results> pResults(
+        librdf_model_query_execute(m_pModel.get(), pQuery.get()),
+        safe_librdf_free_query_results);
+    if (!pResults || !librdf_query_results_is_graph(pResults.get())) {
+        throw rdf::QueryException(
+            "librdf_Repository::queryConstruct: "
+            "query result is null or not graph", *this);
+    }
+    const std::shared_ptr<librdf_stream> pStream(
+        librdf_query_results_as_stream(pResults.get()),
+        safe_librdf_free_stream);
+    if (!pStream) {
+        throw rdf::QueryException(
+            "librdf_Repository::queryConstruct: "
+            "librdf_query_results_as_stream failed", *this);
+    }
+
+    return new librdf_GraphResult(this, m_aMutex, pStream,
+                                  std::shared_ptr<librdf_node>(), pQuery);
+}
+
+sal_Bool SAL_CALL
+librdf_Repository::queryAsk(const OUString & i_rQuery)
+{
+    ::osl::MutexGuard g(m_aMutex);
+
+    const OString query(
+        OUStringToOString(i_rQuery, RTL_TEXTENCODING_UTF8) );
+    const std::shared_ptr<librdf_query> pQuery(
+        librdf_new_query(m_pWorld.get(), s_sparql, nullptr,
+            reinterpret_cast<const unsigned char*> (query.getStr()), nullptr),
+        safe_librdf_free_query);
+    if (!pQuery) {
+        throw rdf::QueryException(
+            "librdf_Repository::queryAsk: "
+            "librdf_new_query failed", *this);
+    }
+    const std::shared_ptr<librdf_query_results> pResults(
+        librdf_model_query_execute(m_pModel.get(), pQuery.get()),
+        safe_librdf_free_query_results);
+    if (!pResults || !librdf_query_results_is_boolean(pResults.get())) {
+        throw rdf::QueryException(
+            "librdf_Repository::queryAsk: "
+            "query result is null or not boolean", *this);
+    }
+    return bool(librdf_query_results_get_boolean(pResults.get()));
+}
+
+// css::rdf::XDocumentRepository:
+void SAL_CALL librdf_Repository::setStatementRDFa(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Sequence< uno::Reference< rdf::XURI > > & i_rPredicates,
+    const uno::Reference< rdf::XMetadatable > & i_xObject,
+    const OUString & i_rRDFaContent,
+    const uno::Reference< rdf::XURI > & i_xRDFaDatatype)
+{
+    if (!i_xSubject.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::setStatementRDFa: Subject is null", *this, 0);
+    }
+    if (!i_rPredicates.hasElements()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::setStatementRDFa: no Predicates",
+            *this, 1);
+    }
+    if (std::any_of(i_rPredicates.begin(), i_rPredicates.end(),
+            [](const uno::Reference< rdf::XURI >& rPredicate) { return !rPredicate.is(); })) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::setStatementRDFa: Predicate is null", *this, 1);
+    }
+    if (!i_xObject.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::setStatementRDFa: Object is null", *this, 2);
+    }
+    const uno::Reference<lang::XServiceInfo> xService(i_xObject,
+        uno::UNO_QUERY_THROW);
+    uno::Reference<text::XTextRange> xTextRange;
+    if (xService->supportsService("com.sun.star.table.Cell") ||
+        xService->supportsService("com.sun.star.text.CellProperties") || // for writer
+        xService->supportsService("com.sun.star.text.Paragraph"))
+    {
+        xTextRange.set(i_xObject, uno::UNO_QUERY_THROW);
+    }
+    else if (xService->supportsService("com.sun.star.text.Bookmark") ||
+             xService->supportsService("com.sun.star.text.InContentMetadata"))
+    {
+        const uno::Reference<text::XTextContent> xTextContent(i_xObject,
+            uno::UNO_QUERY_THROW);
+        xTextRange = xTextContent->getAnchor();
+    }
+    if (!xTextRange.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::setStatementRDFa: "
+            "Object does not support RDFa", *this, 2);
+    }
+    // ensure that the metadatable has an XML ID
+    i_xObject->ensureMetadataReference();
+    const beans::StringPair mdref( i_xObject->getMetadataReference() );
+    if ((mdref.First.isEmpty()) || (mdref.Second.isEmpty())) {
+        throw uno::RuntimeException(
+                "librdf_Repository::setStatementRDFa: "
+                "ensureMetadataReference did not", *this);
+    }
+    OUString const sXmlId(mdref.First + "#" + mdref.Second);
+    OUString const sContext(s_nsOOo + sXmlId);
+    OUString const content( (i_rRDFaContent.isEmpty())
+            ? xTextRange->getString()
+            : i_rRDFaContent );
+    uno::Reference<rdf::XNode> xContent;
+    try {
+        if (i_xRDFaDatatype.is()) {
+            xContent.set(rdf::Literal::createWithType(m_xContext,
+                    content, i_xRDFaDatatype),
+                uno::UNO_QUERY_THROW);
+        } else {
+            xContent.set(rdf::Literal::create(m_xContext, content),
+                uno::UNO_QUERY_THROW);
+        }
+    } catch (const lang::IllegalArgumentException &) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw lang::WrappedTargetRuntimeException(
+                "librdf_Repository::setStatementRDFa: "
+                "cannot create literal", *this, anyEx);
+    }
+
+    std::shared_ptr<librdf_TypeConverter::Resource> const pSubject(
+        librdf_TypeConverter::extractResource_NoLock(i_xSubject));
+    std::shared_ptr<librdf_TypeConverter::Node> const pContent(
+        librdf_TypeConverter::extractNode_NoLock(xContent));
+    ::std::vector< std::shared_ptr<librdf_TypeConverter::Resource> >
+        predicates;
+    ::std::transform(i_rPredicates.begin(), i_rPredicates.end(),
+        ::std::back_inserter(predicates),
+        [](uno::Reference<rdf::XURI> const& xURI)
+            { return librdf_TypeConverter::extractResource_NoLock(xURI); });
+
+    removeStatementRDFa(i_xObject); // not atomic with insertion?
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    if (i_rRDFaContent.isEmpty()) {
+        m_RDFaXHTMLContentSet.erase(sXmlId);
+    } else {
+        m_RDFaXHTMLContentSet.insert(sXmlId);
+    }
+    try
+    {
+        for (const auto& rPredicatePtr : predicates)
+        {
+            addStatementGraph_Lock(
+                librdf_TypeConverter::Statement(pSubject,
+                    std::dynamic_pointer_cast<librdf_TypeConverter::URI>(rPredicatePtr),
+                    pContent),
+                sContext, true);
+        }
+    }
+    catch (const container::NoSuchElementException&)
+    {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw lang::WrappedTargetRuntimeException(
+                "librdf_Repository::setStatementRDFa: "
+                "cannot addStatementGraph", *this, anyEx);
+    }
+}
+
+void SAL_CALL librdf_Repository::removeStatementRDFa(
+    const uno::Reference< rdf::XMetadatable > & i_xElement)
+{
+    if (!i_xElement.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::removeStatementRDFa: Element is null",
+            *this, 0);
+    }
+
+    const beans::StringPair mdref( i_xElement->getMetadataReference() );
+    if ((mdref.First.isEmpty()) || (mdref.Second.isEmpty())) {
+        return; // nothing to do...
+    }
+
+    OUString const sXmlId(s_nsOOo + mdref.First + "#" + mdref.Second);
+
+    clearGraph_NoLock(sXmlId, true);
+}
+
+beans::Pair< uno::Sequence<rdf::Statement>, sal_Bool > SAL_CALL
+librdf_Repository::getStatementRDFa(
+    const uno::Reference< rdf::XMetadatable > & i_xElement)
+{
+    if (!i_xElement.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::getStatementRDFa: Element is null", *this, 0);
+    }
+    const beans::StringPair mdref( i_xElement->getMetadataReference() );
+    if ((mdref.First.isEmpty()) || (mdref.Second.isEmpty())) {
+        return beans::Pair< uno::Sequence<rdf::Statement>, sal_Bool >();
+    }
+    OUString const sXmlId(mdref.First + "#" + mdref.Second);
+    uno::Reference<rdf::XURI> xXmlId;
+    try {
+        xXmlId.set( rdf::URI::create(m_xContext, s_nsOOo + sXmlId),
+            uno::UNO_SET_THROW);
+    } catch (const lang::IllegalArgumentException &) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw lang::WrappedTargetRuntimeException(
+                "librdf_Repository::getStatementRDFa: "
+                "cannot create URI for XML ID", *this, anyEx);
+    }
+
+    ::std::vector< rdf::Statement > ret;
+    try
+    {
+        ret = getStatementsGraph_NoLock(nullptr, nullptr, nullptr, xXmlId, true);
+    }
+    catch (const container::NoSuchElementException&)
+    {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw lang::WrappedTargetRuntimeException(
+                "librdf_Repository::getStatementRDFa: "
+                "cannot getStatementsGraph", *this, anyEx);
+    }
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    return beans::Pair< uno::Sequence<rdf::Statement>, sal_Bool >(
+            comphelper::containerToSequence(ret), 0 != m_RDFaXHTMLContentSet.count(sXmlId));
+}
+
+extern "C"
+librdf_statement *rdfa_context_stream_map_handler(
+    librdf_stream *i_pStream, void *, librdf_statement *i_pStatement)
+{
+    OSL_ENSURE(i_pStream, "rdfa_context_stream_map_handler: stream null");
+    if (i_pStream) {
+        librdf_node *pCtxt(
+#if LIBRDF_VERSION >= 10012
+            librdf_stream_get_context2(i_pStream) );
+#else
+            static_cast<librdf_node *>(librdf_stream_get_context(i_pStream)) );
+#endif
+        OSL_ENSURE(pCtxt, "rdfa_context_stream_map_handler: context null");
+        if (pCtxt && isInternalContext(pCtxt)) {
+            return i_pStatement;
+        }
+    }
+    return nullptr;
+};
+
+uno::Reference< container::XEnumeration > SAL_CALL
+librdf_Repository::getStatementsRDFa(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject)
+{
+    if (isMetadatableWithoutMetadata(i_xSubject)   ||
+        isMetadatableWithoutMetadata(i_xPredicate) ||
+        isMetadatableWithoutMetadata(i_xObject))
+    {
+        return new librdf_GraphResult(this, m_aMutex,
+            std::shared_ptr<librdf_stream>(),
+            std::shared_ptr<librdf_node>());
+    }
+
+    librdf_TypeConverter::Statement const stmt(
+        librdf_TypeConverter::extractStatement_NoLock(
+            i_xSubject, i_xPredicate, i_xObject));
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    const std::shared_ptr<librdf_statement> pStatement(
+        librdf_TypeConverter::mkStatement_Lock(m_pWorld.get(), stmt),
+        safe_librdf_free_statement);
+    OSL_ENSURE(pStatement, "mkStatement failed");
+
+    const std::shared_ptr<librdf_stream> pStream(
+        librdf_model_find_statements(m_pModel.get(), pStatement.get()),
+        safe_librdf_free_stream);
+    if (!pStream) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::getStatementsRDFa: "
+            "librdf_model_find_statements failed", *this);
+    }
+
+    if (librdf_stream_add_map(pStream.get(), rdfa_context_stream_map_handler,
+                nullptr, nullptr)) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::getStatementsRDFa: "
+            "librdf_stream_add_map failed", *this);
+    }
+
+    return new librdf_GraphResult(this, m_aMutex, pStream,
+                                  std::shared_ptr<librdf_node>());
+}
+
+// css::lang::XInitialization:
+void SAL_CALL librdf_Repository::initialize(
+    const uno::Sequence< css::uno::Any > &)
+{
+    ::osl::MutexGuard g(m_aMutex);
+
+//    m_pWorld.reset(m_TypeConverter.createWorld(), safe_librdf_free_world);
+    m_pStorage.reset(m_TypeConverter.createStorage_Lock(m_pWorld.get()),
+        safe_librdf_free_storage);
+    m_pModel.reset(m_TypeConverter.createModel_Lock(
+        m_pWorld.get(), m_pStorage.get()), safe_librdf_free_model);
+}
+
+NamedGraphMap_t::iterator librdf_Repository::clearGraph_NoLock(
+        OUString const& i_rGraphName, bool i_Internal)
+//    throw (uno::RuntimeException, container::NoSuchElementException,
+//        rdf::RepositoryException)
+{
+    ::osl::MutexGuard g(m_aMutex);
+
+    return clearGraph_Lock(i_rGraphName, i_Internal);
+}
+
+NamedGraphMap_t::iterator librdf_Repository::clearGraph_Lock(
+        OUString const& i_rGraphName, bool i_Internal)
+{
+    // internal: must be called with mutex locked!
+    const NamedGraphMap_t::iterator iter( m_NamedGraphs.find(i_rGraphName) );
+    if (!i_Internal && iter == m_NamedGraphs.end()) {
+        throw container::NoSuchElementException(
+                "librdf_Repository::clearGraph: "
+                "no graph with given URI exists", *this);
+    }
+    const OString context(
+        OUStringToOString(i_rGraphName, RTL_TEXTENCODING_UTF8) );
+
+    const std::shared_ptr<librdf_node> pContext(
+        librdf_new_node_from_uri_string(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> (context.getStr())),
+        safe_librdf_free_node);
+    if (!pContext) {
+        throw uno::RuntimeException(
+            "librdf_Repository::clearGraph: "
+            "librdf_new_node_from_uri_string failed", *this);
+    }
+    if (librdf_model_context_remove_statements(m_pModel.get(), pContext.get()))
+    {
+        throw rdf::RepositoryException(
+            "librdf_Repository::clearGraph: "
+            "librdf_model_context_remove_statements failed", *this);
+    }
+    return iter;
+}
+
+void librdf_Repository::addStatementGraph_NoLock(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject,
+    const uno::Reference< rdf::XURI > & i_xGraphName)
+//throw (uno::RuntimeException, lang::IllegalArgumentException,
+//    container::NoSuchElementException, rdf::RepositoryException)
+{
+    if (!i_xSubject.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::addStatement: Subject is null", *this, 0);
+    }
+    if (!i_xPredicate.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::addStatement: Predicate is null",
+            *this, 1);
+    }
+    if (!i_xObject.is()) {
+        throw lang::IllegalArgumentException(
+            "librdf_Repository::addStatement: Object is null", *this, 2);
+    }
+
+    librdf_TypeConverter::Statement const stmt(
+        librdf_TypeConverter::extractStatement_NoLock(
+            i_xSubject, i_xPredicate, i_xObject));
+
+    const OUString contextU( i_xGraphName->getStringValue() );
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    addStatementGraph_Lock(stmt, contextU, false/*i_Internal*/);
+}
+
+void librdf_Repository::addStatementGraph_Lock(
+    librdf_TypeConverter::Statement const& i_rStatement,
+    OUString const& i_rGraphName,
+    bool i_Internal)
+{
+    if (!i_Internal
+        && (m_NamedGraphs.find(i_rGraphName) == m_NamedGraphs.end()))
+    {
+        throw container::NoSuchElementException(
+                "librdf_Repository::addStatement: "
+                "no graph with given URI exists", *this);
+    }
+    const OString context(
+        OUStringToOString(i_rGraphName, RTL_TEXTENCODING_UTF8) );
+
+    const std::shared_ptr<librdf_node> pContext(
+        librdf_new_node_from_uri_string(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> (context.getStr())),
+        safe_librdf_free_node);
+    if (!pContext) {
+        throw uno::RuntimeException(
+            "librdf_Repository::addStatement: "
+            "librdf_new_node_from_uri_string failed", *this);
+    }
+    const std::shared_ptr<librdf_statement> pStatement(
+        librdf_TypeConverter::mkStatement_Lock(m_pWorld.get(), i_rStatement),
+        safe_librdf_free_statement);
+    OSL_ENSURE(pStatement, "mkStatement failed");
+
+    // Test for duplicate statement
+    // librdf_model_add_statement disallows duplicates while
+    // librdf_model_context_add_statement allows duplicates
+    {
+        const std::shared_ptr<librdf_stream> pStream(
+            librdf_model_find_statements_in_context(m_pModel.get(),
+                pStatement.get(), pContext.get()),
+            safe_librdf_free_stream);
+        if (pStream && !librdf_stream_end(pStream.get()))
+            return;
+    }
+
+    if (librdf_model_context_add_statement(m_pModel.get(),
+            pContext.get(), pStatement.get())) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::addStatement: "
+            "librdf_model_context_add_statement failed", *this);
+    }
+}
+
+void librdf_Repository::removeStatementsGraph_NoLock(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject,
+    const uno::Reference< rdf::XURI > & i_xGraphName)
+//throw (uno::RuntimeException, lang::IllegalArgumentException,
+//    container::NoSuchElementException, rdf::RepositoryException)
+{
+    if (isMetadatableWithoutMetadata(i_xSubject)   ||
+        isMetadatableWithoutMetadata(i_xPredicate) ||
+        isMetadatableWithoutMetadata(i_xObject))
+    {
+        return;
+    }
+
+    librdf_TypeConverter::Statement const stmt(
+        librdf_TypeConverter::extractStatement_NoLock(
+            i_xSubject, i_xPredicate, i_xObject));
+    const OUString contextU( i_xGraphName->getStringValue() );
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    if (m_NamedGraphs.find(contextU) == m_NamedGraphs.end()) {
+        throw container::NoSuchElementException(
+                "librdf_Repository::removeStatements: "
+                "no graph with given URI exists", *this);
+    }
+    const OString context(
+        OUStringToOString(contextU, RTL_TEXTENCODING_UTF8) );
+
+    const std::shared_ptr<librdf_node> pContext(
+        librdf_new_node_from_uri_string(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> (context.getStr())),
+        safe_librdf_free_node);
+    if (!pContext) {
+        throw uno::RuntimeException(
+            "librdf_Repository::removeStatements: "
+            "librdf_new_node_from_uri_string failed", *this);
+    }
+    const std::shared_ptr<librdf_statement> pStatement(
+        librdf_TypeConverter::mkStatement_Lock(m_pWorld.get(), stmt),
+        safe_librdf_free_statement);
+    OSL_ENSURE(pStatement, "mkStatement failed");
+
+    const std::shared_ptr<librdf_stream> pStream(
+        librdf_model_find_statements_in_context(m_pModel.get(),
+            pStatement.get(), pContext.get()),
+        safe_librdf_free_stream);
+    if (!pStream) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::removeStatements: "
+            "librdf_model_find_statements_in_context failed", *this);
+    }
+
+    if (!librdf_stream_end(pStream.get())) {
+        do {
+            librdf_statement *pStmt( librdf_stream_get_object(pStream.get()) );
+            if (!pStmt) {
+                throw rdf::RepositoryException(
+                    "librdf_Repository::removeStatements: "
+                    "librdf_stream_get_object failed", *this);
+            }
+            if (librdf_model_context_remove_statement(m_pModel.get(),
+                    pContext.get(), pStmt)) {
+                throw rdf::RepositoryException(
+                    "librdf_Repository::removeStatements: "
+                    "librdf_model_context_remove_statement failed", *this);
+            }
+        } while (!librdf_stream_next(pStream.get()));
+    }
+}
+
+std::vector<rdf::Statement>
+librdf_Repository::getStatementsGraph_NoLock(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject,
+    const uno::Reference< rdf::XURI > & i_xGraphName,
+    bool i_Internal)
+//throw (uno::RuntimeException, lang::IllegalArgumentException,
+//    container::NoSuchElementException, rdf::RepositoryException)
+{
+    std::vector<rdf::Statement> ret;
+
+    // N.B.: if any of subject, predicate, object is an XMetadatable, and
+    // has no metadata reference, then there cannot be any node in the graph
+    // representing it; in order to prevent side effect
+    // (ensureMetadataReference), check for this condition and return
+    if (isMetadatableWithoutMetadata(i_xSubject)   ||
+        isMetadatableWithoutMetadata(i_xPredicate) ||
+        isMetadatableWithoutMetadata(i_xObject))
+    {
+        return ret;
+    }
+
+    librdf_TypeConverter::Statement const stmt(
+        librdf_TypeConverter::extractStatement_NoLock(
+            i_xSubject, i_xPredicate, i_xObject));
+    const OUString contextU( i_xGraphName->getStringValue() );
+
+    ::osl::MutexGuard g(m_aMutex); // don't call i_x* with mutex locked
+
+    if (!i_Internal && (m_NamedGraphs.find(contextU) == m_NamedGraphs.end())) {
+        throw container::NoSuchElementException(
+                "librdf_Repository::getStatements: "
+                "no graph with given URI exists", *this);
+    }
+    const OString context(
+        OUStringToOString(contextU, RTL_TEXTENCODING_UTF8) );
+
+    const std::shared_ptr<librdf_node> pContext(
+        librdf_new_node_from_uri_string(m_pWorld.get(),
+            reinterpret_cast<const unsigned char*> (context.getStr())),
+        safe_librdf_free_node);
+    if (!pContext) {
+        throw uno::RuntimeException(
+            "librdf_Repository::getStatements: "
+            "librdf_new_node_from_uri_string failed", *this);
+    }
+    const std::shared_ptr<librdf_statement> pStatement(
+        librdf_TypeConverter::mkStatement_Lock(m_pWorld.get(), stmt),
+        safe_librdf_free_statement);
+    OSL_ENSURE(pStatement, "mkStatement failed");
+
+    const std::shared_ptr<librdf_stream> pStream(
+        librdf_model_find_statements_in_context(m_pModel.get(),
+            pStatement.get(), pContext.get()),
+        safe_librdf_free_stream);
+    if (!pStream) {
+        throw rdf::RepositoryException(
+            "librdf_Repository::getStatements: "
+            "librdf_model_find_statements_in_context failed", *this);
+    }
+
+    librdf_node *pCtxt1(
+#if LIBRDF_VERSION >= 10012
+        librdf_stream_get_context2(pStream.get()) );
+#else
+        static_cast<librdf_node *>(librdf_stream_get_context(pStream.get())) );
+#endif
+    while (!librdf_stream_end(pStream.get()))
+    {
+        auto pCtxt = pCtxt1;
+        librdf_statement *pStmt( librdf_stream_get_object(pStream.get()) );
+        if (!pStmt) {
+            rdf::QueryException e(
+                "librdf_GraphResult::nextElement: "
+                "librdf_stream_get_object failed", *this);
+            throw lang::WrappedTargetException(
+                "librdf_GraphResult::nextElement: "
+                "librdf_stream_get_object failed", *this,
+                    uno::makeAny(e));
+        }
+        // NB: pCtxt may be null here if this is result of a graph query
+        if (pCtxt && isInternalContext(pCtxt)) {
+            pCtxt = nullptr; // XML ID context is implementation detail!
+        }
+
+        ret.emplace_back(
+            getTypeConverter().convertToStatement(pStmt, pCtxt) );
+
+        // NB: this will invalidate current item.
+        librdf_stream_next(pStream.get());
+    }
+
+    return ret;
+}
+
+extern "C"
+void librdf_raptor_init(void* /*user_data*/, raptor_world* pRaptorWorld)
+{
+    // fdo#64672 prevent raptor from setting global libxml2 error handlers
+    raptor_world_set_flag(pRaptorWorld,
+            RAPTOR_WORLD_FLAG_LIBXML_STRUCTURED_ERROR_SAVE, 0);
+    raptor_world_set_flag(pRaptorWorld,
+            RAPTOR_WORLD_FLAG_LIBXML_GENERIC_ERROR_SAVE, 0);
+}
+
+librdf_world *librdf_TypeConverter::createWorld_Lock() const
+{
+    // create and initialize world
+    librdf_world *pWorld( librdf_new_world() );
+    if (!pWorld) {
+        throw uno::RuntimeException(
+            "librdf_TypeConverter::createWorld: librdf_new_world failed",
+            m_rRep);
+    }
+    librdf_world_set_raptor_init_handler(pWorld, nullptr, &librdf_raptor_init);
+    //FIXME logger, digest, features?
+    xsltSecurityPrefsPtr origprefs = xsltGetDefaultSecurityPrefs();
+    librdf_world_open(pWorld);
+    xsltSecurityPrefsPtr newprefs = xsltGetDefaultSecurityPrefs();
+    if (newprefs != origprefs) {
+        // #i110523# restore libxslt global configuration
+        // (gratuitously overwritten by raptor_init_parser_grddl_common)
+        // (this is the only reason unordf is linked against libxslt)
+        xsltSetDefaultSecurityPrefs(origprefs);
+    }
+    return pWorld;
+}
+
+librdf_storage *
+librdf_TypeConverter::createStorage_Lock(librdf_world *i_pWorld) const
+{
+    librdf_storage *pStorage(
+//        librdf_new_storage(i_pWorld, "memory", NULL, "contexts='yes'") );
+        librdf_new_storage(i_pWorld, "hashes", nullptr,
+            "contexts='yes',hash-type='memory'") );
+    if (!pStorage) {
+        throw uno::RuntimeException(
+            "librdf_TypeConverter::createStorage: librdf_new_storage failed",
+            m_rRep);
+    }
+    return pStorage;
+}
+
+librdf_model *librdf_TypeConverter::createModel_Lock(
+    librdf_world *i_pWorld, librdf_storage * i_pStorage) const
+{
+    librdf_model *pRepository( librdf_new_model(i_pWorld, i_pStorage, nullptr) );
+    if (!pRepository) {
+        throw uno::RuntimeException(
+            "librdf_TypeConverter::createModel: librdf_new_model failed",
+            m_rRep);
+    }
+    //FIXME
+#if 0
+    {
+        librdf_uri * ctxt = librdf_new_uri(i_pWorld, reinterpret_cast<const unsigned char *>(LIBRDF_MODEL_FEATURE_CONTEXTS));
+        librdf_node * contexts = librdf_model_get_feature(repository, ctxt);
+        if (!contexts)
+            throw;
+        std::cout << "value of contexts feature: ";
+        prtNode(contexts);
+        std::cout << std::endl;
+        // librdf_model_set_feature(repository, LIBRDF_FEATURE_CONTEXTS, ...);
+        safe_librdf_free_node(contexts);
+        safe_librdf_free_uri(ctxt);
+    }
+#endif
+    return pRepository;
+}
+
+// this does NOT create a node, only URI
+librdf_uri* librdf_TypeConverter::mkURI_Lock( librdf_world* i_pWorld,
+    OString const& i_rURI)
+{
+    librdf_uri *pURI( librdf_new_uri(i_pWorld,
+        reinterpret_cast<const unsigned char *>(i_rURI.getStr())));
+    if (!pURI) {
+        throw uno::RuntimeException(
+            "librdf_TypeConverter::mkURI: librdf_new_uri failed", nullptr);
+    }
+    return pURI;
+}
+
+// extract blank or URI node - call without Mutex locked
+std::shared_ptr<librdf_TypeConverter::Resource>
+librdf_TypeConverter::extractResource_NoLock(
+    const uno::Reference< rdf::XResource > & i_xResource)
+{
+    if (!i_xResource.is()) {
+        return std::shared_ptr<Resource>();
+    }
+    uno::Reference< rdf::XBlankNode > xBlankNode(i_xResource, uno::UNO_QUERY);
+    if (xBlankNode.is()) {
+        const OString label(
+            OUStringToOString(xBlankNode->getStringValue(),
+            RTL_TEXTENCODING_UTF8) );
+        return std::make_shared<BlankNode>(label);
+    } else { // assumption: everything else is URI
+        const OString uri(
+            OUStringToOString(i_xResource->getStringValue(),
+            RTL_TEXTENCODING_UTF8) );
+        return std::make_shared<URI>(uri);
+    }
+}
+
+void
+librdf_TypeConverter::extractResourceToCacheKey_NoLock(
+    const uno::Reference< rdf::XResource > & i_xResource, OUStringBuffer& rBuffer)
+{
+    if (!i_xResource.is()) {
+        return;
+    }
+    uno::Reference< rdf::XBlankNode > xBlankNode(i_xResource, uno::UNO_QUERY);
+    if (xBlankNode.is()) {
+        rBuffer.append("BlankNode ").append(xBlankNode->getStringValue());
+    } else { // assumption: everything else is URI
+        rBuffer.append("URI ").append(i_xResource->getStringValue());
+    }
+}
+
+// create blank or URI node
+librdf_node* librdf_TypeConverter::mkResource_Lock( librdf_world* i_pWorld,
+    Resource const*const i_pResource)
+{
+    if (!i_pResource) return nullptr;
+    BlankNode const*const pBlankNode(
+            dynamic_cast<BlankNode const*>(i_pResource));
+    if (pBlankNode) {
+        librdf_node *pNode(
+            librdf_new_node_from_blank_identifier(i_pWorld,
+                reinterpret_cast<const unsigned char*>(
+                    pBlankNode->value.getStr())));
+        if (!pNode) {
+            throw uno::RuntimeException(
+                "librdf_TypeConverter::mkResource: "
+                "librdf_new_node_from_blank_identifier failed", nullptr);
+        }
+        return pNode;
+    } else { // assumption: everything else is URI
+        URI const*const pURI(dynamic_cast<URI const*>(i_pResource));
+        assert(pURI);
+        librdf_node *pNode(
+            librdf_new_node_from_uri_string(i_pWorld,
+                reinterpret_cast<const unsigned char*>(pURI->value.getStr())));
+        if (!pNode) {
+            throw uno::RuntimeException(
+                "librdf_TypeConverter::mkResource: "
+                "librdf_new_node_from_uri_string failed", nullptr);
+        }
+        return pNode;
+    }
+}
+
+// extract blank or URI or literal node - call without Mutex locked
+std::shared_ptr<librdf_TypeConverter::Node>
+librdf_TypeConverter::extractNode_NoLock(
+    const uno::Reference< rdf::XNode > & i_xNode)
+{
+    if (!i_xNode.is()) {
+        return std::shared_ptr<Node>();
+    }
+    uno::Reference< rdf::XResource > xResource(i_xNode, uno::UNO_QUERY);
+    if (xResource.is()) {
+        return extractResource_NoLock(xResource);
+    }
+    uno::Reference< rdf::XLiteral> xLiteral(i_xNode, uno::UNO_QUERY);
+    OSL_ENSURE(xLiteral.is(),
+        "mkNode: someone invented a new rdf.XNode and did not tell me");
+    if (!xLiteral.is()) {
+        return std::shared_ptr<Node>();
+    }
+    const OString val(
+        OUStringToOString(xLiteral->getValue(),
+        RTL_TEXTENCODING_UTF8) );
+    const OString lang(
+        OUStringToOString(xLiteral->getLanguage(),
+        RTL_TEXTENCODING_UTF8) );
+    const uno::Reference< rdf::XURI > xType(xLiteral->getDatatype());
+    std::optional<OString> type;
+    if (xType.is())
+    {
+        type =
+            OUStringToOString(xType->getStringValue(), RTL_TEXTENCODING_UTF8);
+    }
+    return std::make_shared<Literal>(val, lang, type);
+}
+
+// extract blank or URI or literal node - call without Mutex locked
+void
+librdf_TypeConverter::extractNodeToCacheKey_NoLock(
+    const uno::Reference< rdf::XNode > & i_xNode,
+    OUStringBuffer& rBuffer)
+{
+    if (!i_xNode.is()) {
+        return;
+    }
+    uno::Reference< rdf::XResource > xResource(i_xNode, uno::UNO_QUERY);
+    if (xResource.is()) {
+        return extractResourceToCacheKey_NoLock(xResource, rBuffer);
+    }
+    uno::Reference< rdf::XLiteral> xLiteral(i_xNode, uno::UNO_QUERY);
+    OSL_ENSURE(xLiteral.is(),
+        "mkNode: someone invented a new rdf.XNode and did not tell me");
+    if (!xLiteral.is()) {
+        return;
+    }
+    rBuffer.append("Literal ").append(xLiteral->getValue()).append("\t").append(xLiteral->getLanguage());
+    const uno::Reference< rdf::XURI > xType(xLiteral->getDatatype());
+    if (xType.is())
+        rBuffer.append("\t").append(xType->getStringValue());
+}
+
+// create blank or URI or literal node
+librdf_node* librdf_TypeConverter::mkNode_Lock( librdf_world* i_pWorld,
+    Node const*const i_pNode)
+{
+    if (!i_pNode) return nullptr;
+    Resource const*const pResource(dynamic_cast<Resource const*>(i_pNode));
+    if (pResource) {
+        return mkResource_Lock(i_pWorld, pResource);
+    }
+
+    Literal const*const pLiteral(dynamic_cast<Literal const*>(i_pNode));
+    assert(pLiteral);
+    librdf_node * ret(nullptr);
+    if (pLiteral->language.isEmpty()) {
+        if (!pLiteral->type) {
+            ret = librdf_new_node_from_literal(i_pWorld,
+                reinterpret_cast<const unsigned char*>(pLiteral->value.getStr())
+                , nullptr, 0);
+        } else {
+            const std::shared_ptr<librdf_uri> pDatatype(
+                mkURI_Lock(i_pWorld, *pLiteral->type),
+                safe_librdf_free_uri);
+            ret = librdf_new_node_from_typed_literal(i_pWorld,
+                reinterpret_cast<const unsigned char*>(pLiteral->value.getStr())
+                , nullptr, pDatatype.get());
+        }
+    } else {
+        if (!pLiteral->type) {
+            ret = librdf_new_node_from_literal(i_pWorld,
+                reinterpret_cast<const unsigned char*>(pLiteral->value.getStr())
+                , pLiteral->language.getStr(), 0);
+        } else {
+            OSL_FAIL("mkNode: invalid literal");
+            return nullptr;
+        }
+    }
+    if (!ret) {
+        throw uno::RuntimeException(
+            "librdf_TypeConverter::mkNode: librdf_new_node_from_literal failed", nullptr);
+    }
+    return ret;
+}
+
+// extract statement - call without Mutex locked
+librdf_TypeConverter::Statement librdf_TypeConverter::extractStatement_NoLock(
+    const uno::Reference< rdf::XResource > & i_xSubject,
+    const uno::Reference< rdf::XURI > & i_xPredicate,
+    const uno::Reference< rdf::XNode > & i_xObject)
+{
+    std::shared_ptr<Resource> const pSubject(
+            extractResource_NoLock(i_xSubject));
+    std::shared_ptr<URI> const pPredicate(
+        std::dynamic_pointer_cast<URI>(extractResource_NoLock(i_xPredicate)));
+    std::shared_ptr<Node> const pObject(extractNode_NoLock(i_xObject));
+    return Statement(pSubject, pPredicate, pObject);
+}
+
+librdf_statement* librdf_TypeConverter::mkStatement_Lock(librdf_world* i_pWorld,
+    Statement const& i_rStatement)
+{
+    librdf_node *const pSubject(
+            mkResource_Lock(i_pWorld, i_rStatement.pSubject.get()) );
+    librdf_node* pPredicate(nullptr);
+    librdf_node* pObject(nullptr);
+    try {
+        pPredicate = mkResource_Lock(i_pWorld, i_rStatement.pPredicate.get());
+        try {
+            pObject = mkNode_Lock(i_pWorld, i_rStatement.pObject.get());
+        } catch (...) {
+            safe_librdf_free_node(pPredicate);
+            throw;
+        }
+    } catch (...) {
+        safe_librdf_free_node(pSubject);
+        throw;
+    }
+    // NB: this takes ownership of the nodes! (which is really ugly)
+    librdf_statement* pStatement( librdf_new_statement_from_nodes(i_pWorld,
+        pSubject, pPredicate, pObject) );
+    if (!pStatement) {
+        throw uno::RuntimeException(
+            "librdf_TypeConverter::mkStatement: "
+            "librdf_new_statement_from_nodes failed", nullptr);
+    }
+    return pStatement;
+}
+
+uno::Reference<rdf::XURI>
+librdf_TypeConverter::convertToXURI(librdf_uri* i_pURI) const
+{
+    if (!i_pURI) return nullptr;
+    const unsigned char* uri( librdf_uri_as_string(i_pURI) );
+    if (!uri) {
+        throw uno::RuntimeException(
+            "librdf_TypeConverter::convertToXURI: "
+            "librdf_uri_as_string failed", m_rRep);
+    }
+    OUString uriU( OStringToOUString(
+        OString(reinterpret_cast<const char*>(uri)),
+        RTL_TEXTENCODING_UTF8) );
+    try {
+        return rdf::URI::create(m_xContext, uriU);
+    } catch (const lang::IllegalArgumentException &) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw lang::WrappedTargetRuntimeException(
+                "librdf_TypeConverter::convertToXURI: "
+                "illegal uri", m_rRep, anyEx);
+    }
+}
+
+uno::Reference<rdf::XURI>
+librdf_TypeConverter::convertToXURI(librdf_node* i_pNode) const
+{
+    if (!i_pNode) return nullptr;
+    if (librdf_node_is_resource(i_pNode)) {
+        librdf_uri* pURI( librdf_node_get_uri(i_pNode) );
+        if (!pURI) {
+            throw uno::RuntimeException(
+                "librdf_TypeConverter::convertToXURI: "
+                "resource has no uri", m_rRep);
+        }
+        return convertToXURI(pURI);
+    } else {
+        OSL_FAIL("convertToXURI: unknown librdf_node");
+        return nullptr;
+    }
+}
+
+uno::Reference<rdf::XResource>
+librdf_TypeConverter::convertToXResource(librdf_node* i_pNode) const
+{
+    if (!i_pNode) return nullptr;
+    if (librdf_node_is_blank(i_pNode)) {
+        const unsigned char* label( librdf_node_get_blank_identifier(i_pNode) );
+        if (!label) {
+            throw uno::RuntimeException(
+                "librdf_TypeConverter::convertToXResource: "
+                "blank node has no label", m_rRep);
+        }
+        OUString labelU( OStringToOUString(
+            OString(reinterpret_cast<const char*>(label)),
+            RTL_TEXTENCODING_UTF8) );
+        try {
+            return rdf::BlankNode::create(m_xContext, labelU);
+        } catch (const lang::IllegalArgumentException &) {
+            css::uno::Any anyEx = cppu::getCaughtException();
+            throw lang::WrappedTargetRuntimeException(
+                    "librdf_TypeConverter::convertToXResource: "
+                    "illegal blank node label", m_rRep, anyEx);
+        }
+    } else {
+        return convertToXURI(i_pNode);
+    }
+}
+
+uno::Reference<rdf::XNode>
+librdf_TypeConverter::convertToXNode(librdf_node* i_pNode) const
+{
+    if (!i_pNode) return nullptr;
+    if (!librdf_node_is_literal(i_pNode)) {
+        return convertToXResource(i_pNode);
+    }
+    const unsigned char* value( librdf_node_get_literal_value(i_pNode) );
+    if (!value) {
+        throw uno::RuntimeException(
+            "librdf_TypeConverter::convertToXNode: "
+            "literal has no value", m_rRep);
+    }
+    const char * lang( librdf_node_get_literal_value_language(i_pNode) );
+    librdf_uri* pType(
+        librdf_node_get_literal_value_datatype_uri(i_pNode) );
+    OSL_ENSURE(!lang || !pType, "convertToXNode: invalid literal");
+    const OUString valueU( OStringToOUString(
+        OString(reinterpret_cast<const char*>(value)),
+        RTL_TEXTENCODING_UTF8) );
+    if (lang) {
+        const OUString langU( OStringToOUString(
+            OString(reinterpret_cast<const char*>(lang)),
+            RTL_TEXTENCODING_UTF8) );
+        return rdf::Literal::createWithLanguage(m_xContext, valueU, langU);
+    } else if (pType) {
+        uno::Reference<rdf::XURI> xType(convertToXURI(pType));
+        OSL_ENSURE(xType.is(), "convertToXNode: null uri");
+        return rdf::Literal::createWithType(m_xContext, valueU, xType);
+    } else {
+        return rdf::Literal::create(m_xContext, valueU);
+    }
+}
+
+rdf::Statement
+librdf_TypeConverter::convertToStatement(librdf_statement* i_pStmt,
+    librdf_node* i_pContext) const
+{
+    if (!i_pStmt) {
+        throw uno::RuntimeException();
+    }
+    return rdf::Statement(
+        convertToXResource(librdf_statement_get_subject(i_pStmt)),
+        convertToXURI(librdf_statement_get_predicate(i_pStmt)),
+        convertToXNode(librdf_statement_get_object(i_pStmt)),
+        convertToXURI(i_pContext));
+}
+
+} // closing anonymous implementation namespace
+
+
+// component helper namespace
+namespace comp_librdf_Repository {
+
+OUString _getImplementationName() {
+    return "librdf_Repository";
+}
+
+uno::Sequence< OUString > _getSupportedServiceNames()
+{
+    return { "com.sun.star.rdf.Repository" };
+}
+
+uno::Reference< uno::XInterface > _create(
+    const uno::Reference< uno::XComponentContext > & context)
+{
+    return static_cast< ::cppu::OWeakObject * >(new librdf_Repository(context));
+}
+
+} // closing component helper namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/unoxml/source/rdf/librdf_repository.hxx b/unoxml/source/rdf/librdf_repository.hxx
new file mode 100644
index 000000000..2f67490d4
--- /dev/null
+++ b/unoxml/source/rdf/librdf_repository.hxx
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_UNOXML_SOURCE_RDF_LIBRDF_REPOSITORY_HXX
+#define INCLUDED_UNOXML_SOURCE_RDF_LIBRDF_REPOSITORY_HXX
+
+#include <sal/config.h>
+#include <cppuhelper/factory.hxx>
+
+
+// component helper namespace
+namespace comp_librdf_Repository {
+
+// component and service helper functions:
+OUString _getImplementationName();
+css::uno::Sequence< OUString > _getSupportedServiceNames();
+css::uno::Reference< css::uno::XInterface > _create( css::uno::Reference< css::uno::XComponentContext > const & context );
+
+} // closing component helper namespace
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/unoxml/source/rdf/librdf_services.cxx b/unoxml/source/rdf/librdf_services.cxx
new file mode 100644
index 000000000..cd6292bb2
--- /dev/null
+++ b/unoxml/source/rdf/librdf_services.cxx
@@ -0,0 +1,62 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <cppuhelper/factory.hxx>
+#include <cppuhelper/implementationentry.hxx>
+
+#include "CNodes.hxx"
+#include "librdf_repository.hxx"
+
+
+using namespace ::com::sun::star;
+
+
+extern "C"
+{
+
+static ::cppu::ImplementationEntry const entries[] = {
+    { &comp_CBlankNode::_create,
+      &comp_CBlankNode::_getImplementationName,
+      &comp_CBlankNode::_getSupportedServiceNames,
+      &::cppu::createSingleComponentFactory, nullptr, 0 },
+    { &comp_CURI::_create,
+      &comp_CURI::_getImplementationName,
+      &comp_CURI::_getSupportedServiceNames,
+      &::cppu::createSingleComponentFactory, nullptr, 0 },
+    { &comp_CLiteral::_create,
+      &comp_CLiteral::_getImplementationName,
+      &comp_CLiteral::_getSupportedServiceNames,
+      &::cppu::createSingleComponentFactory, nullptr, 0 },
+    { &comp_librdf_Repository::_create,
+      &comp_librdf_Repository::_getImplementationName,
+      &comp_librdf_Repository::_getSupportedServiceNames,
+      &::cppu::createSingleComponentFactory, nullptr, 0 },
+    { nullptr, nullptr, nullptr, nullptr, nullptr, 0 }
+};
+
+SAL_DLLPUBLIC_EXPORT void * unordf_component_getFactory(
+    const char * implName, void * serviceManager, void * registryKey)
+{
+    return ::cppu::component_getFactoryHelper(
+        implName, serviceManager, registryKey, entries);
+}
+
+} // extern "C"
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/unoxml/source/rdf/unordf.component b/unoxml/source/rdf/unordf.component
new file mode 100644
index 000000000..094534153
--- /dev/null
+++ b/unoxml/source/rdf/unordf.component
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    prefix="unordf" xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="CBlankNode">
+    <service name="com.sun.star.rdf.BlankNode"/>
+  </implementation>
+  <implementation name="CLiteral">
+    <service name="com.sun.star.rdf.Literal"/>
+  </implementation>
+  <implementation name="CURI">
+    <service name="com.sun.star.rdf.URI"/>
+  </implementation>
+  <implementation name="librdf_Repository">
+    <service name="com.sun.star.rdf.Repository"/>
+  </implementation>
+</component>