--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-591552AB-D708-5CB5-9597-A0AF3D303178.dita	Thu Jan 21 18:18:20 2010 +0000
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-591552AB-D708-5CB5-9597-A0AF3D303178" xml:lang="en"><title>Headers</title><shortdesc>This document describes the concept of headers as regards to doubly
+linked lists.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>A header forms the anchor point for a doubly linked list. In common with
+the elements of the list, the header includes a <i>link</i> object as a component.</p>
+<p>The header includes the following functionality:</p>
+<ul>
+<li id="GUID-A713D790-2003-5788-889F-E3B3D9669B0D"><p>allows elements to be
+added to the start and end of a doubly linked list, but <i>not</i> to the
+middle.</p> </li>
+<li id="GUID-84EB986A-7501-57FF-BFD0-DB67182A3050"><p>tests if an element
+is at the start or end of a list.</p> </li>
+<li id="GUID-94683FD4-C576-520D-8CEC-D1D7A8978D0C"><p>returns pointers to
+elements at the start or the end of a list.</p> </li>
+</ul>
+<p>A header is an instance of the templated class <codeph>TDblQue&lt;class
+        T&gt;</codeph>.</p>
+</conbody></concept>
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