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diff --git a/xmloff/source/text/XMLIndexMarkExport.hxx b/xmloff/source/text/XMLIndexMarkExport.hxx
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+++ b/xmloff/source/text/XMLIndexMarkExport.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 .
+ */
+
+#pragma once
+
+#include <rtl/ustrbuf.hxx>
+#include <com/sun/star/uno/Reference.h>
+
+class SvXMLExport;
+namespace com::sun::star {
+    namespace beans { class XPropertySet; }
+}
+
+
+/**
+ * This class handles the export of index marks for table of content,
+ * alphabetical and user index.
+ *
+ * Marks for bibliography indices are internally modelled as text
+ * fields and thus handled in txtparae.cxx
+ */
+class XMLIndexMarkExport
+{
+    static constexpr OUString gsLevel = u"Level"_ustr;
+    static constexpr OUString gsUserIndexName = u"UserIndexName"_ustr;
+    static constexpr OUString gsPrimaryKey = u"PrimaryKey"_ustr;
+    static constexpr OUString gsSecondaryKey = u"SecondaryKey"_ustr;
+    static constexpr OUString gsDocumentIndexMark = u"DocumentIndexMark"_ustr;
+    static constexpr OUString gsIsStart = u"IsStart"_ustr;
+    static constexpr OUString gsIsCollapsed = u"IsCollapsed"_ustr;
+    static constexpr OUString gsAlternativeText = u"AlternativeText"_ustr;
+    static constexpr OUString gsTextReading = u"TextReading"_ustr;
+    static constexpr OUString gsPrimaryKeyReading = u"PrimaryKeyReading"_ustr;
+    static constexpr OUString gsSecondaryKeyReading = u"SecondaryKeyReading"_ustr;
+    static constexpr OUString gsMainEntry = u"IsMainEntry"_ustr;
+
+    SvXMLExport& rExport;
+
+public:
+    explicit XMLIndexMarkExport(SvXMLExport& rExp);
+
+    /**
+     * export by the property set of its *text* *portion*.
+     *
+     * The text portion supplies us with the properties of the index
+     * mark itself, as well as the information whether we are at the
+     * start or end of an index mark, or whether the index mark is
+     * collapsed.
+     */
+    void ExportIndexMark(
+        const css::uno::Reference<css::beans::XPropertySet> & rPropSet,
+        bool bAutoStyles);
+
+private:
+
+    /// export attributes of table-of-content index marks
+    void ExportTOCMarkAttributes(
+        const css::uno::Reference<css::beans::XPropertySet> & rPropSet);
+
+    /// export attributes of user index marks
+    void ExportUserIndexMarkAttributes(
+        const css::uno::Reference<css::beans::XPropertySet> & rPropSet);
+
+    /// export attributes of alphabetical  index marks
+    void ExportAlphabeticalIndexMarkAttributes(
+        const css::uno::Reference<css::beans::XPropertySet> & rPropSet);
+
+    /// create a numerical ID for this index mark
+    /// (represented by its properties)
+    static void GetID(
+        OUStringBuffer& sBuffer,
+        const css::uno::Reference<css::beans::XPropertySet> & rPropSet);
+
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */