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diff --git a/offapi/com/sun/star/configuration/backend/XSingleLayerStratum.idl b/offapi/com/sun/star/configuration/backend/XSingleLayerStratum.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_configuration_backend_XSingleLayerStratum_idl__
+#define __com_sun_star_configuration_backend_XSingleLayerStratum_idl__
+
+#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/configuration/backend/XLayer.idl>
+#include <com/sun/star/configuration/backend/XUpdatableLayer.idl>
+#include <com/sun/star/configuration/backend/BackendAccessException.idl>
+#include <com/sun/star/lang/IllegalArgumentException.idl>
+#include <com/sun/star/lang/NoSupportException.idl>
+
+
+module com { module sun { module star { module configuration { module backend {
+
+
+/**
+  Handles access to a stratum consisting of a single layer
+  in a configuration data repository
+
+  <p> The interface provides timestamp-checking capabilities
+     for efficient caching.
+  </p>
+
+  @see com::sun::star::util::XTimeStamped
+  @see com::sun::star::configuration::backend::XSchemaSupplier
+  @see com::sun::star::configuration::backend::XMultiLayerStratum
+
+  @since OOo 1.1.2
+*/
+published interface XSingleLayerStratum : ::com::sun::star::uno::XInterface
+{
+
+    /**
+        retrieves the layer data for a component, if newer than indicated.
+
+        <p> A timestamp can be provided, which is used to indicate
+            a point in time. The layer should be returned only if is modified
+            since that time.
+        </p>
+
+        @param aComponent
+                The name of the component to access.
+
+        @param aTimestamp
+                a timestamp for the layer.
+
+                <p> An empty timestamp indicates, that the layer should be
+                    retrieved irrespective of its modification time.
+                </p>
+                <p> The format and meaning of a timestamp depends on
+                    the implementation. Timestamps can be obtained using
+                    com::sun::star::util::XTimeStamped::getTimestamp().
+                </p>
+
+      @returns
+                a Layer object providing access to the layer data,
+                `NULL` if the layer is newer than indicated by the timestamp.
+
+      @throws   com::sun::star::lang::IllegalArgumentException
+                if the component identifier is invalid or
+                if the timestamp is invalid.
+
+      @throws   com::sun::star::configuration::backend::BackendAccessException
+                if an error occurs while accessing the data.
+
+      @see com::sun::star::util::XTimeStamped
+    */
+    XLayer getLayer([in] string aComponent,
+                    [in] string aTimestamp)
+        raises (BackendAccessException,
+                com::sun::star::lang::IllegalArgumentException) ;
+
+
+    /**
+        retrieves a writable representation of the layer for a component.
+
+        @param aComponent
+                The name of the component to access.
+
+        @return
+                an UpdatableLayer object providing
+                write access to the layer
+
+        @throws   com::sun::star::lang::IllegalArgumentException
+                if the component identifier is invalid.
+
+        @throws   com::sun::star::lang::NoSupportException
+                if the implementation does not support updates.
+
+        @throws   com::sun::star::configuration::backend::BackendAccessException
+                if an error occurs while accessing the data.
+     */
+    XUpdatableLayer getUpdatableLayer([in] string aComponent)
+        raises (BackendAccessException,
+                com::sun::star::lang::NoSupportException,
+                com::sun::star::lang::IllegalArgumentException) ;
+
+} ;
+
+
+} ; } ; } ; } ; } ;
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */