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diff --git a/xmloff/source/text/XMLIndexSourceBaseContext.hxx b/xmloff/source/text/XMLIndexSourceBaseContext.hxx
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+++ b/xmloff/source/text/XMLIndexSourceBaseContext.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 <xmloff/xmlictxt.hxx>
+#include <com/sun/star/uno/Reference.h>
+#include <rtl/ustring.hxx>
+#include <sax/fastattribs.hxx>
+
+
+namespace com::sun::star {
+    namespace xml::sax { class XAttributeList; }
+    namespace beans { class XPropertySet; }
+}
+
+/**
+ * Superclass for index source elements
+ */
+class XMLIndexSourceBaseContext : public SvXMLImportContext
+{
+protected:
+    enum class UseStyles { None, Level, Single };
+
+private:
+    UseStyles m_UseStyles;
+    bool bChapterIndex;     /// chapter-wise or document index?
+    bool bRelativeTabs;     /// tab stops relative to margin or indent?
+
+protected:
+
+    /// property set of index; must be accessible to subclasses
+    css::uno::Reference<css::beans::XPropertySet> & rIndexPropertySet;
+
+public:
+
+
+    XMLIndexSourceBaseContext(
+        SvXMLImport& rImport,
+        css::uno::Reference<css::beans::XPropertySet> & rPropSet,
+        UseStyles eUseStyles);
+
+    virtual ~XMLIndexSourceBaseContext() override;
+
+protected:
+
+    virtual void SAL_CALL startFastElement(
+        sal_Int32 nElement,
+        const css::uno::Reference< css::xml::sax::XFastAttributeList >& xAttrList ) override;
+
+    virtual void ProcessAttribute(const sax_fastparser::FastAttributeList::FastAttributeIter & aIter);
+
+    virtual void SAL_CALL endFastElement(sal_Int32 nElement) override;
+
+    virtual css::uno::Reference< css::xml::sax::XFastContextHandler > SAL_CALL createFastChildContext(
+        sal_Int32 nElement,
+        const css::uno::Reference< css::xml::sax::XFastAttributeList >& xAttrList ) override;
+};
+
+
+namespace xmloff {
+
+OUString GetIndexSourceStyleName(
+    css::uno::Reference<css::xml::sax::XFastAttributeList> const& xAttrList);
+
+} // namespace xmloff
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */