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diff --git a/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/DAS.java b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/DAS.java
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+/*
+ * 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
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.das.rdb;
+
+import org.apache.tuscany.das.rdb.impl.DASFactoryImpl;
+
+import commonj.sdo.DataObject;
+
+/**
+ * A CommandGroup represents a set of {@link Command} and single {@link ApplyChangesCommand} 
+ * that are created from a common config file.
+ * 
+ */
+public interface DAS {
+
+    DASFactory FACTORY = new DASFactoryImpl();
+
+    /**
+     * The change history is scanned and modifications to the graph of data objects are flushed to the database.
+     * 
+     * @param root
+     *            the topmost containing data object
+     */
+    void applyChanges(DataObject root);
+
+    /**
+     * Gets the named command from this factory's inventory
+     * 
+     * @param name
+     *            The identifying name of the requested command
+     * @return Returns the identified command
+     */
+    Command getCommand(String name);
+
+    /**
+     * If the CommandGroup is managing connections then this method must be called 
+     * when the client is done with the instance.
+     * 
+     */
+    void releaseResources();
+
+    /**
+     * Creates a Command based on the provided SQL statement
+     * 
+     * @param sql
+     *            The SQL statement
+     * @return returns a Command instance
+     */
+    Command createCommand(String sql);
+
+}