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diff --git a/java/org/odmg/DList.java b/java/org/odmg/DList.java
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+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Rasdaman community is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+*/
+package org.odmg;
+
+/**
+* The ODMG List collection.
+* A <code>DList</code> collection is an ordered collection that provides
+* efficient insertion and removal of elements at arbitrary positions in the
+* list, but it also supports indexed access. The beginning index value is 0.
+* When an element is added at a given position in the list, the index of all
+* subsequent elements is increased by 1. Similarly, when an element is removed
+* from the list, the index of all subsequent elements is decreased by 1.
+* <p>
+* All of the operations defined by the JavaSoft <code>List</code>
+* interface are supported by an ODMG implementation of <code>DList</code>,
+* the exception <code>UnsupportedOperationException</code> is not thrown when a
+* call is made to any of the <code>List</code> methods.
+* @author	David Jordan (as Java Editor of the Object Data Management Group)
+* @version ODMG 3.0
+*/
+// * @see com.sun.java.util.collections.UnsupportedOperationException
+
+public interface DList extends DCollection, java.util.List {
+/**
+* Creates a new <code>DList</code> object that contains the contents of this
+* <code>DList</code> object concatenated
+* with the contents of the <code>otherList</code> object.
+* @param	otherList	The list whose elements are placed at the end of the list
+* returned by this method.
+* @return	A new <code>DList</code> that is the concatenation of this list and
+* the list referenced by <code>otherList</code>.
+*/
+	public DList concat(DList otherList);
+}
+