diff -r 43e37759235e -r 51a74ef9ed63 Symbian3/SDK/Source/GUID-05785721-C090-50C6-BE5E-46EF14222FFF.dita
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-05785721-C090-50C6-BE5E-46EF14222FFF.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,32 @@
+<?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-05785721-C090-50C6-BE5E-46EF14222FFF" xml:lang="en"><title>8
+bit variant, 16 bit variant and build independence</title><shortdesc>This document describes 8 bit variant, 16 bit variant and build
+independence.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>Descriptors are supplied in two variants:</p>
+<ul>
+<li id="GUID-6CAEBC92-A518-5623-8DE4-A685091CBD5B"><p>the 16 bit variant for
+handling Unicode strings and double byte valued data</p> </li>
+<li id="GUID-9D9C6C04-FFC2-5E41-8E55-E62DCC04CB31"><p>the 8 bit variant for
+handling non-Unicode strings and single byte valued data (binary data).</p> </li>
+</ul>
+<p>Descriptors are also supplied as build independent types. These are used
+whenever descriptors are used to represent text strings. By using build independent
+types, the appropriate variant, either 16 bit or 8 bit, is selected at build
+time depending on whether the <codeph>_UNICODE</codeph> macro has been defined
+or not.</p>
+<p>Binary data always requires the 8 bit variant, regardless of the build,
+and this should be explicitly used in program code.</p>
+<p>Explicit use of the 16 bit variant is rare.</p>
+<p>With a few exceptions, the behaviour of both 8 bit and 16 bit variants
+is the same.</p>
+</conbody></concept>
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