--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-E21287EF-7211-590B-A1E3-E0B37069FCB2.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,21 @@
+<?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-E21287EF-7211-590B-A1E3-E0B37069FCB2" xml:lang="en"><title>POSIX Realtime
+Extensions</title><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>POSIX real-time extensions (based on <xref href="http://en.wikipedia.org/wiki/POSIX" scope="external">POSIX 1003.1b</xref>) define extensions such as timers, priority
+scheduling, real-time signals, semaphores, memory queues, shared memory and
+memory locking that are useful for development of real-time systems. Extensions
+such as, timers and shared memory are supported by the <xref href="http://refspecs.freestandards.org/LSB_3.1.0/LSB-Core-generic/LSB-Core-generic/librt.html" scope="external">Librt library</xref>, which conforms to the Linux Standard
+Base (LSB) 3.1 Specification. The Symbian platform supports the Librt library,
+which enables Symbian Developers to port Librt-based applications onto the
+Symbian platform quickly and easily.</p>
+</conbody></concept>
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