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diff --git a/include/xmloff/xmlictxt.hxx b/include/xmloff/xmlictxt.hxx
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+++ b/include/xmloff/xmlictxt.hxx
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+/* -*- 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_XMLOFF_XMLICTXT_HXX
+#define INCLUDED_XMLOFF_XMLICTXT_HXX
+
+#include <sal/config.h>
+#include <xmloff/dllapi.h>
+#include <sal/log.hxx>
+#include <sal/types.h>
+#include <com/sun/star/xml/sax/XFastContextHandler.hpp>
+#include <com/sun/star/lang/XTypeProvider.hpp>
+#include <rtl/ustring.hxx>
+#include <xmloff/namespacemap.hxx>
+#include <optional>
+
+namespace com::sun::star::xml::sax { class XAttributeList; }
+
+class SvXMLImport;
+
+class SvXMLImportContext;
+
+typedef rtl::Reference<SvXMLImportContext> SvXMLImportContextRef;
+
+/**
+This class deliberately does not support XWeak, to improve performance when loading
+large documents.
+*/
+class XMLOFF_DLLPUBLIC SvXMLImportContext : public css::xml::sax::XFastContextHandler,
+                                            public css::lang::XTypeProvider
+
+{
+    friend class SvXMLImport;
+
+    SvXMLImport&                       mrImport;
+    oslInterlockedCount                m_nRefCount;
+    std::optional<SvXMLNamespaceMap>  m_xRewindMap;
+
+    SAL_DLLPRIVATE std::optional<SvXMLNamespaceMap> TakeRewindMap() { return std::move(m_xRewindMap); }
+    SAL_DLLPRIVATE void PutRewindMap(std::optional<SvXMLNamespaceMap>&& p) { m_xRewindMap = std::move(p); }
+
+protected:
+
+    SvXMLImport& GetImport() { return mrImport; }
+    const SvXMLImport& GetImport() const { return mrImport; }
+
+public:
+
+    /** A contexts constructor does anything that is required if an element
+     * starts. Namespace processing has been done already.
+     * Note that virtual methods cannot be used inside constructors. Use
+     * StartElement instead if this is required. */
+    SvXMLImportContext( SvXMLImport& rImport );
+
+    /** A contexts destructor does anything that is required if an element
+     * ends. By default, nothing is done.
+     * Note that virtual methods cannot be used inside destructors. Use
+     * EndElement instead if this is required. */
+    virtual ~SvXMLImportContext();
+
+    // css::xml::sax::XFastContextHandler:
+    virtual void SAL_CALL startFastElement (sal_Int32 Element,
+        const css::uno::Reference< css::xml::sax::XFastAttributeList >& Attribs) override;
+
+    virtual void SAL_CALL startUnknownElement(const OUString & Namespace, const OUString & Name,
+        const css::uno::Reference< css::xml::sax::XFastAttributeList > & Attribs) override;
+
+    /** endFastElement is called before a context will be destructed, but
+     * after an elements context has been parsed. It may be used for actions
+     * that require virtual methods. The default is to do nothing. */
+    virtual void SAL_CALL endFastElement(sal_Int32 Element) override;
+
+    virtual void SAL_CALL endUnknownElement(const OUString & Namespace, const OUString & Name) override;
+
+    virtual css::uno::Reference< XFastContextHandler >  SAL_CALL createFastChildContext(sal_Int32 Element,
+        const css::uno::Reference<css::xml::sax::XFastAttributeList>& Attribs) override;
+
+    virtual css::uno::Reference< css::xml::sax::XFastContextHandler > SAL_CALL createUnknownChildContext(
+        const OUString & Namespace, const OUString & Name,
+        const css::uno::Reference< css::xml::sax::XFastAttributeList > & Attribs) override;
+
+    /** This method is called for all characters that are contained in the
+     * current element. The default is to ignore them. */
+    virtual void SAL_CALL characters(const OUString & aChars) override;
+
+    // XInterface
+    virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type& aType ) final override;
+    virtual void SAL_CALL acquire() noexcept final override
+    { osl_atomic_increment(&m_nRefCount); }
+    virtual void SAL_CALL release() noexcept final override
+    { if (osl_atomic_decrement(&m_nRefCount) == 0) delete this; }
+
+    // XTypeProvider
+    virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes(  ) final override;
+    virtual css::uno::Sequence< sal_Int8 > SAL_CALL getImplementationId(  ) final override;
+};
+
+#define XMLOFF_WARN_UNKNOWN(area, rIter) \
+    SAL_WARN(area, "unknown attribute " << SvXMLImport::getPrefixAndNameFromToken(rIter.getToken()) << " value=" << rIter.toString());
+
+#define XMLOFF_WARN_UNKNOWN_ATTR(area, token, value) \
+    SAL_WARN(area, "unknown attribute " << SvXMLImport::getPrefixAndNameFromToken(token) << "=" << value);
+
+#define XMLOFF_WARN_UNKNOWN_ELEMENT(area, token) \
+    SAL_WARN(area, "unknown element " << SvXMLImport::getPrefixAndNameFromToken(token));
+
+#endif // INCLUDED_XMLOFF_XMLICTXT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */