diff -r 89d6a7a84779 -r 25a17d01db0c Symbian3/PDK/Source/GUID-ACDED56F-38FE-491D-B019-BE2C53A75D28.dita
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/PDK/Source/GUID-ACDED56F-38FE-491D-B019-BE2C53A75D28.dita	Fri Jan 22 18:26:19 2010 +0000
@@ -0,0 +1,50 @@
+<?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-ACDED56F-38FE-491D-B019-BE2C53A75D28" xml:lang="en"><title>Data
+caging</title><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>Data caging means that the applications and the users have access only
+to certain areas of the file system. In practice the applications can access
+their own private folders and folders that are marked as open. It means, for
+example, that one application cannot access the private folder and data of
+another application. There are restricted file storage areas for system, private,
+and resource data.</p>
+<p>The file system has the following structure:</p>
+<ul>
+<li><p>The <codeph>\sys</codeph> folder is the restricted system
+area. You need <codeph>AllFiles</codeph> capability to read the content, and
+Trusted Computing Base (<codeph>TCB</codeph>) capability to modify the content.</p>
+<p>The subfolder <codeph>\sys\bin\</codeph> contains all binaries (<codeph>exe</codeph>, <codeph>dll</codeph>,
+etc.). All binaries must have a different name. An application can only be
+launched from this subfolder.</p></li>
+<li><p>The <parmname>\private\</parmname> folder includes folders
+for all applications.</p><p>The <codeph>\private\&lt;SID&gt;\</codeph> subfolder
+contains private data only to be accessed by the application itself. SID is
+determined by the <xref href="GUID-3B6E25F7-C1A8-461F-97F7-421DB559BC98.dita#GUID-3B6E25F7-C1A8-461F-97F7-421DB559BC98/GUID-EEC50FC0-46D5-4ED7-AD95-67430D5EC652">Secure
+Identifier</xref> of the process. Without any capabilities you can read and
+write only in the application's own directory. You need <codeph>AllFiles</codeph> capability
+to access all private directories. Backup software can read and write to this
+directory.</p><p>The <codeph>\private\&lt;SID&gt;\import\</codeph> subfolder
+is for resource files, such as registration files, that are not directly related
+to the application. You can write into this subfolder only after it is created
+and named correctly.</p><p>Application registration resource files should
+be installed in the <parmname>\private\10003a3f\import\apps</parmname> subfolder.</p>
+</li>
+<li><p>The <parmname>\resource</parmname> folder is for sharing
+resource files.  This data can be icons, bitmaps, and other material useful
+for all the applications. You do not need any capabilities to read these files.
+You need <codeph>TCB</codeph> capability to modify the content.</p><p>ECom
+registration resource files should be installed in the <parmname>\resource\plugins</parmname> subfolder.</p>
+</li>
+</ul>
+<p>For more information, see <xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/guide/Base-subsystem-guide/f32/FileServerClientSide/FileServerClientSideGuide5/ApplicationArchitecture.guide.html" format="application/java-archive">File
+locations</xref>.</p>
+</conbody></concept>
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