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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_beans_Optional_idl__
+#define __com_sun_star_beans_Optional_idl__
+
+module com {  module sun {  module star {  module beans {
+
+/**
+   An optional value of a given type.
+
+   <p>This structure is used as the type of interface attributes corresponding
+   to instances of com::sun::star::beans::Property that
+   have the com::sun::star::beans::PropertyAttribute::MAYBEVOID.  It might
+   also be useful in other situations, for example as the return type of an
+   interface method.</p>
+ */
+struct Optional<T> {
+    /**
+       Marks this structure instance as having an actual value.
+     */
+    boolean IsPresent;
+
+    /**
+       The actual value of this structure instance.
+
+       <p>If no actual value is present, a producer of such a structure instance
+       should leave this member defaulted, and a consumer of such a structure
+       instance should ignore the specific value stored in this member.</p>
+     */
+    T Value;
+};
+
+}; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */