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diff --git a/offapi/com/sun/star/chart2/XDataInterpreter.idl b/offapi/com/sun/star/chart2/XDataInterpreter.idl
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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 com_sun_star_chart2_XDataInterpreter_idl
+#define com_sun_star_chart2_XDataInterpreter_idl
+
+#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/beans/PropertyValue.idl>
+#include <com/sun/star/chart2/InterpretedData.idl>
+#include <com/sun/star/chart2/data/XDataSource.idl>
+#include <com/sun/star/chart2/XDataSeries.idl>
+
+module com
+{
+module sun
+{
+module star
+{
+module chart2
+{
+
+/** offers tooling to interpret different data sources in a structural
+    and chart-type-dependent way.
+ */
+interface XDataInterpreter  : ::com::sun::star::uno::XInterface
+{
+    /** Interprets the given data.
+
+        @param xSource
+            the data source.
+
+        @param aArguments
+            Arguments that tell the template how to slice the given
+            range.  The properties should be defined in a separate
+            service.
+
+            <p>For standard parameters that may be used, see the
+            service StandardDiagramCreationParameters.
+            </p>
+
+        @param aSeriesToReUse
+            use all the data series given here for the result before
+            creating new ones.
+     */
+    InterpretedData interpretDataSource(
+        [in] com::sun::star::chart2::data::XDataSource xSource,
+        [in] sequence< com::sun::star::beans::PropertyValue > aArguments,
+        [in] sequence< XDataSeries > aSeriesToReUse );
+
+    /** Re-interprets the data given in <code>aInterpretedData</code>
+        while keeping the number of data series and the categories.
+     */
+    InterpretedData reinterpretDataSeries( [in] InterpretedData aInterpretedData );
+
+    /** parses the given data and states, if a
+        reinterpretDataSeries() call can be done
+        without data loss.
+
+        @return
+            `TRUE`, if the data given in
+            <code>aInterpretedData</code> has a similar structure than
+            the one required is used as output of the data interpreter.
+     */
+    boolean isDataCompatible( [in] InterpretedData aInterpretedData );
+
+    /** Try to reverse the operation done in
+        interpretDataSource().
+
+        <p>In case <code>aInterpretedData</code> is the result of
+        interpretDataSource()( <code>xSource</code> ),
+        the result of this method should be <code>xSource</code>.</p>
+     */
+    com::sun::star::chart2::data::XDataSource mergeInterpretedData( [in] InterpretedData aInterpretedData );
+};
+
+} ; // chart2
+} ; // com
+} ; // sun
+} ; // star
+
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */