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Symbian3/PDK/Source/GUID-AB705D21-87A3-5F32-A4B9-17B7593DD5C3.dita
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Fri, 22 Jan 2010 18:26:19 +0000
changeset 1 25a17d01db0c
child 3 46218c8b8afa
permissions -rw-r--r--
Addition of the PDK content and example code for Documentation_content according to Feature bug 1607 and bug 1608
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License
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"Eclipse Public License v1.0" which accompanies this distribution,
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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    Nokia Corporation - initial contribution.
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Contributors:
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-->
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<!DOCTYPE concept
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="GUID-AB705D21-87A3-5F32-A4B9-17B7593DD5C3" xml:lang="en"><title>UID
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Manipulation Overview</title><shortdesc>Describes how globally unique identifiers are manipulated.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
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<section id="GUID-78302F5A-97C3-4B95-9F72-842D91C2C25C"><title>Purpose</title> <p>To guarantee uniqueness,
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all UID values are assigned to developers centrally by Symbian. </p> </section>
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<section id="GUID-0600181A-2383-419B-BB57-2833C05F9AE3"><title>Architectural relationships</title> <p>Symbian platform makes
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extensive use of UIDs to provide lightweight identification of file types.
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This includes both document and executable files. APIs that need to manipulate
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files therefore typically use UIDs.</p> </section>
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<section id="GUID-B4652BA6-A500-4F3E-9AFF-02C339706B2B"><title>Description</title> <p>The API has two key concepts: UID and
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compound identifier. </p> <p><b>UID</b> </p> <p>The
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UID is a small wrapper class around a 32-bit value that provides comparison
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operators and conversion to text.</p> <p>The UID interface is provided by <xref href="GUID-530281E6-29FC-33F2-BC9B-610FBA389444.dita"><apiname>TUid</apiname></xref>.</p> <p><b>Compound identifier</b> </p> <p>The compound identifier is a group of
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up to three UIDs that identify the type of a file. The meaning of the UIDs
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varies according to whether the file is a DLL, or document file, etc. </p> <p>The
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compound identifier interface is provided by <xref href="GUID-B6D6B0AD-B15C-339A-8540-40540885089A.dita"><apiname>TUidType</apiname></xref>.</p> </section>
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<section id="GUID-ECF8B994-B8F0-4EC4-8CE8-06F031541D79"><title>See also</title> <p><xref href="GUID-260C7ACD-0024-59DE-B1C6-0C852E44C457.dita">Dynamically
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Loading Link Libraries Overview</xref> </p> <p><xref href="GUID-B69FE02E-3A78-5438-BA7C-F7BB4CD3EB76.dita">File
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Server Client Side Overview</xref> </p> <p><xref href="GUID-21CF1D5F-44C5-5407-B3C9-8BC103C97079.dita">File
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Stores Overview</xref> </p> </section>
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</conbody></concept>
MCL/sftools/depl/docscontent