diff -r 43e37759235e -r 51a74ef9ed63 Symbian3/SDK/Source/GUID-0F784804-8452-4C92-ABB3-56B81BAED744.dita
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-0F784804-8452-4C92-ABB3-56B81BAED744.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,54 @@
+<?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-0F784804-8452-4C92-ABB3-56B81BAED744" xml:lang="en"><title>Sensor
+Services Overview</title><shortdesc>The Sensor Services collection is a group of components that provide
+APIs for extending sensors by means of plug-ins and providing channel-based
+communication with the sensor hardware.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<section id="GUID-A6D94351-3A27-40CA-876A-B47B69AFD48C"><title>Key Concepts
+and Terms</title><dl>
+<dlentry>
+<dt>Sensor</dt>
+<dd><p>A sensor is a hardware measuring device connected to the Symbian
+device, which measures a physical quantity in its immediate vicinity and converts
+that quantity into small sets of numeric digital values.</p></dd>
+</dlentry>
+<dlentry>
+<dt>Sensor Subsystem (SSY)</dt>
+<dd><p>Sensor Subsystems are plug-ins that connect the sensor hardware with
+the sensor server.</p></dd>
+</dlentry>
+</dl>           </section>
+<section id="GUID-567734D1-EDE0-4799-8851-B798BB7ACF50"><title>Architecture</title> 
+     <fig id="GUID-BD0DC0F8-9DA8-40D2-ABE5-F6D7D36BB4B6">
+<title>Sensor Services Architecture</title>
+<image href="GUID-5B8FEDA0-624E-44D6-BF70-C5228234BD15_d0e134594_href.png" placement="inline"/>
+</fig><p>The Sensor Services collection consists of the following components:</p><ul>
+<li><p><b>Sensor Framework</b>, which provides sensor server and plug-in interfaces
+for adding any new sensor plug-in as required. The framework also provides
+sensor channel APIs for creating a medium (sensor channel) of exchange between
+the client applications and the sensor hardware. The sensor plug-ins retrieve
+data from sensor hardware (through sensor channels) and enable the client
+applications to use the data for specific requirements. </p></li>
+<li><p><b>Data Compensator</b>, which uses data provided by the sensor plug-ins
+to correct the sensor axis data based on the current orientation of the Symbian
+device. This data can be used by the client applications to display the pages
+in portrait or landscape views.</p></li>
+
+</ul>     </section>
+<section id="GUID-1ADD99BC-6ECF-464F-9E05-0BEA28F67A2B"><title>Typical Uses</title><ul>
+<li><p><xref href="GUID-4B709839-8EEF-4AD2-9868-9AF0176B1E5B.dita">Using Sensor
+Channel APIs</xref>.</p></li>
+<li><p><xref href="GUID-64AC6F53-A9A5-46FD-BCC6-4A9BD8D4DB5C.dita">Compensating
+Sensor Data for Display Orientation</xref></p></li>
+
+</ul></section>
+</conbody></concept>
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