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diff --git a/udkapi/com/sun/star/io/ObjectOutputStream.idl b/udkapi/com/sun/star/io/ObjectOutputStream.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_io_ObjectOutputStream_idl__
+#define __com_sun_star_io_ObjectOutputStream_idl__
+
+#include <com/sun/star/io/XObjectOutputStream.idl>
+
+#include <com/sun/star/io/XActiveDataSource.idl>
+
+#include <com/sun/star/io/XConnectable.idl>
+
+
+
+module com {  module sun {  module star {  module io {
+
+/** is a stream which allows writing the data of persistent objects.
+
+    <p>Implementations of this service must fulfill the specifications of the
+    DataOutputStream service; furthermore, the stream needs to be chained to a
+    XMarkableStream. Therefore, it also provides the XMarkableStream
+    interface, but it delegates the calls to the chained object.
+    The written objects are held until this instance is destroyed.
+    The references to the objects are written as four-byte integers
+    and begin at 1. Data format is written: </p>
+    <pre>
+    short   InfoLength
+    long    ObjectReference // 0 indicates no object
+    UTF     ServiceName     // length of 0 indicates this is only a reference
+    long    ObjectLength    // 0 if it is a reference or no object, otherwise the len of the object data
+    Object  ObjectData      // the data of the object
+    </pre>
+
+    @note
+    <ul>
+        <li>-thread safe </li>
+        <li>-allow buffer size is 2 ^ 31 -1 </li>
+        <li>-maximum object reference identifier is the number of objects.  </li>
+        <li>-object reference identifier 0 indicates no object </li>
+    </ul>
+ */
+published service ObjectOutputStream
+{
+    /** allows to write the data to the stream.
+     */
+    interface com::sun::star::io::XObjectOutputStream;
+
+    /** allows to set the underlying outputstream */
+    interface com::sun::star::io::XActiveDataSource;
+
+    /** allows to navigate via a chain of streams */
+    interface com::sun::star::io::XConnectable;
+
+};
+
+
+}; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */