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diff --git a/offapi/com/sun/star/document/XUndoAction.idl b/offapi/com/sun/star/document/XUndoAction.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_document_XUndoAction_idl__
+#define __com_sun_star_document_XUndoAction_idl__
+
+#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/document/UndoFailedException.idl>
+
+
+module com { module sun { module star { module document {
+
+
+/** represents a single (undoable) action on a document
+    @since OOo 3.4
+ */
+interface XUndoAction
+{
+    /** reverts the action represented by the instance
+
+        @throws UndoFailedException
+            if reverting the action failed. In this case, the caller should assume that this is a permanent failure,
+            and take appropriate action, such as discarding the <code>XUndoAction</code> instance, and any possibly
+            depending instances.
+    */
+    void    undo()
+            raises  (   ::com::sun::star::document::UndoFailedException
+                    );
+
+    /** repeats the action represented by the instance, after it had previously been reverted.
+
+        @throws UndoFailedException
+            if repeating the action failed. In this case, the caller should assume that this is a permanent failure,
+            and take appropriate action, such as discarding the <code>XUndoAction</code> instance, and any possibly
+            depending instances.
+    */
+    void    redo()
+            raises  (   ::com::sun::star::document::UndoFailedException
+                    );
+
+    /** is the human-readable, localized description of the action.
+    */
+    [attribute, readonly]   string  Title;
+};
+
+
+}; }; }; };
+
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */