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diff --git a/offapi/com/sun/star/chart2/XScaling.idl b/offapi/com/sun/star/chart2/XScaling.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_XScaling_idl
+#define com_sun_star_chart2_XScaling_idl
+
+#include <com/sun/star/uno/XInterface.idl>
+
+
+module com {  module sun {  module star {  module chart2 {
+
+
+interface XScaling : ::com::sun::star::uno::XInterface
+{
+    /**
+     * Given a numeric value, return the scaled value that conforms
+     * to a predefined scaling rule.  For instance, for linear
+     * scaling, given a x value, the method may return a y value as
+     * defined by y = Ax + B for predefined values of A and B.
+     *
+     * @param value input value from which to calculate the scaled
+     *              value.
+     *
+     * @return scaled value based on a predefined scaling rule.
+     */
+    double doScaling( [in] double value );
+
+    /**
+     * Get an interface object that conforms to a scaling rule that
+     * is the reverse of the original scaling rule.
+     *
+     * @return interface object that represents the reversed
+     *         scaling rule.
+     */
+    com::sun::star::chart2::XScaling getInverseScaling();
+};
+
+
+}; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */