--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-4C35C86A-D57F-503B-8E55-5D235E0D6DA0.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,33 @@
+<?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-4C35C86A-D57F-503B-8E55-5D235E0D6DA0" xml:lang="en"><title>What
+is Versioning?</title><shortdesc>This topic describes the purpose and uses of versioning. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+
+
+
+<p>Tools and applications use a set of classes to represent the data in the
+Comms Database. These classes are the container classes, which derive from <xref href="GUID-1CDD0B97-8B00-3373-9908-512C9BC1CF51.dita"><apiname>CMDBElement</apiname></xref> and <xref href="GUID-1CDD0B97-8B00-3373-9908-512C9BC1CF51.dita"><apiname>MMetaDatabase</apiname></xref>. </p>
+<p>The format of the data does not match the format of the data in the database.
+The implementation of the CommsDat API maps between the external format and
+the internal format. </p>
+<p>Future releases of Symbian platform can change the internal format. The
+map between the external format and the internal format maintains compatibility
+for tools and applications if the internal format changes. </p>
+<p>A new internal format is a new version of the interface. If a new version
+is created, the older version is deprecated, but Symbian platform maintains
+the compatibility for a managed period. </p>
+<p>You specify the version you need when you create a session with the Comms
+Database. </p>
+<p>A version is defined by an instance of the <xref href="GUID-1CDD0B97-8B00-3373-9908-512C9BC1CF51.dita"><apiname>TVersion</apiname></xref> class. </p>
+<p>In practice, changes to versions are extremely rare. The curent version
+is the same version used when the Comms Database was added to Symbian platform. </p>
+</conbody></concept>
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