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<!-- Copyright (C) 2003 Red Hat, Inc. --> <!-- This material may be distributed only subject to the terms --> <!-- and conditions set forth in the Open Publication License, v1.0 --> <!-- or later (the latest version is presently available at --> <!-- http://www.opencontent.org/openpub/). --> <!-- Distribution of the work or derivative of the work in any --> <!-- standard (paper) book form is prohibited unless prior --> <!-- permission is obtained from the copyright holder. --> <HTML ><HEAD ><TITLE >Component Definition Language</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos User Guide" HREF="ecos-user-guide.html"><LINK REL="UP" TITLE="CDL Concepts" HREF="cdl-concepts.html"><LINK REL="PREVIOUS" TITLE="Component Repository" HREF="cdl-component-repository.html"><LINK REL="NEXT" TITLE="Packages" HREF="cdl-packages.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos User Guide</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="cdl-component-repository.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 24. CDL Concepts</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="cdl-packages.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="CDL-COMPONENT-DEFINITION-LANGUAGE">Component Definition Language</H1 ><P >Part of the component repository is a set of files containing a definition of its structure. The form used for this purpose is the <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >Component Definition Language</I ></SPAN > (CDL). CDL defines the relationships between components and other information used by tools such as the <SPAN CLASS="PRODUCTNAME" >eCos</SPAN ><SPAN CLASS="APPLICATION" >Configuration Tool</SPAN >. CDL is generally formulated by the writers of components: it is not necessary to write or understand CDL in order for the embedded systems developer to construct an <SPAN CLASS="PRODUCTNAME" >eCos</SPAN > configuration. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="cdl-component-repository.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-user-guide.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="cdl-packages.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Component Repository</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="cdl-concepts.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Packages</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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