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+++ b/Symbian3/PDK/Source/GUID-40E64445-CBA3-59E4-A777-937609B311C9.dita	Fri Jan 22 18:26:19 2010 +0000
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+<?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-40E64445-CBA3-59E4-A777-937609B311C9" xml:lang="en"><title>Contacts
+Model Overview</title><prolog><metadata><keywords/></metadata></prolog><conbody>
+<section><title>Purpose</title> <p>The purpose of this document is to give
+guidelines on how to use the Contacts Model API most efficiently for a range
+of typical operations. The Contacts Model is an engine component that provides
+access to contact information stored on a Symbian OS device. Just like a real-world
+address book it stores and organises names, telephone numbers, addresses and
+other details of individuals and companies. It can be used to add, delete
+and edit data as well as providing information to clients, and sorting and
+searching contacts. </p> </section>
+<section><title>Architectural Relationships</title> <p>The Contacts Model
+is primarily used by messaging, telephony, synchronisation and vCard viewer
+clients on a Symbian OS device. </p> <fig id="GUID-79192704-415D-530B-8FEB-F73A5C93D0C2">
+<title>              CONTACTS MODEL CLIENTS            </title>
+<image href="GUID-5B6634EA-EB78-504E-BC5D-ABA67EEA06DF_d0e591102_href.png" placement="inline"/>
+</fig> </section>
+<section><title>Description</title> <p>The <xref href="GUID-6A6C7B3B-1E44-3731-956D-590A1122FF6E.dita"><apiname>CContactDatabase</apiname></xref> class
+allows clients access to the contact data stored on the device and has the
+following functionality: </p> <p><b>Contact database management </b> </p> <p>More than one Contact Database
+can exist on a phone, but a default Contact Database is used if no other is
+specified. Clients can open, close, alter and delete the Contact Database.
+Extra databases can be added as required. The Contact Database can be moved
+between drives, and can be compressed in order to save space. </p> <p><b>Contact items management </b> </p> <p>Contact Items are made up of Contact
+Fields and can be added to and removed from the database. Items in the database
+can be opened, read, sorted and deleted. An item must be opened before it
+can be edited. Editing an item often means altering data in one or more fields,
+such as name or telephone number. To provide different sorting views Contact
+Items can be grouped in categories such as ‘colleagues’ or ‘family’. </p> <p><b>Searching the database </b> </p> <p>Searching <xref href="GUID-6A6C7B3B-1E44-3731-956D-590A1122FF6E.dita"><apiname>CContactDatabase</apiname></xref> implements
+searching and sorting and also provides separate phone number matching functions.
+These provide a fast way of indexing and looking up phone numbers, for example,
+for looking up caller IDs on incoming calls. </p> <p><b>Speed dial functionality </b> </p> <p>The database owns speed dial information.
+This is a mapping between a single digit integer and a telephone number. There
+may be up to nine speed dial telephone numbers. If a Contact Item is deleted,
+its speed dial mapping is removed. </p> <p><b>Notification of changes </b> </p> <p>The database needs to be informed
+of data changes made to it. Sometimes a UI-level application may need to respond
+to updates made by other clients. The Contacts Model provides an observer
+to transmit this information between <xref href="GUID-6A6C7B3B-1E44-3731-956D-590A1122FF6E.dita"><apiname>CContactDatabase</apiname></xref> instances. </p> </section>
+</conbody></concept>
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