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<p><a href="http://www.w3.org/"><img height="48" width="72" alt="W3C"
src="http://www.w3.org/Icons/w3c_home" /></a> <a
href="http://www.oasis-open.org/"><img height="48" alt="OASIS"
src="http://www.oasis-open.org/spectools/images/oasis.gif" /></a></p>

<h1><a id="spec-title" name="spec-title">WebCGM 2.1</a></h1>

<h2><a id="dated-subtitle" name="dated-subtitle"></a>W3C Recommendation 01
March 2010 (Link errors corrected 24 August 2010)</h2>
<dl>
  <dt>This version:</dt>
    <dd><a href="http://www.w3.org/TR/2010/REC-webcgm21-20100301/">http://www.w3.org/TR/2010/REC-webcgm21-20100301/</a></dd>
  <dt>Latest WebCGM 2.1 version:</dt>
    <dd><a
      href="http://www.w3.org/TR/webcgm21/">http://www.w3.org/TR/webcgm21/</a></dd>
  <dt>Latest WebCGM Recommendation:</dt>
    <dd><a
    href="http://www.w3.org/TR/webcgm/">http://www.w3.org/TR/webcgm/</a></dd>
  <dt>Previous version:</dt>
    <dd><a
      href="http://www.w3.org/TR/2010/PR-webcgm21-20100114/">http://www.w3.org/TR/2010/PR-webcgm21-20100114/</a></dd>
    <dd></dd>
  <dt id="Authors">Editors:</dt>
    <dd>Benoit Bezaire, PTC, <a
      href="mailto:bbezaire@ptc.com">bbezaire@ptc.com</a> <br />
      Lofton Henderson, <a
      href="mailto:lofton@rockynet.com">lofton@rockynet.com</a></dd>
</dl>

<p>Please refer to the <a
href="http://www.w3.org/2010/WebCGM21-errata.html"><strong>errata</strong></a>
for this document, which may include some normative corrections.</p>

<p>This document is also available in these non-normative formats: <a
href="WebCGM21.zip">zip
file</a> and <a
href="WebCGM21.html">single
HTML file</a>.<br />
See also <a
href="http://www.w3.org/2003/03/Translations/byTechnology?technology=webcgm21"><strong>translations</strong></a>.</p>

<p class="copyright"><a
href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> ©
2010 <a href="http://www.w3.org/"><acronym
title="World Wide Web Consortium">W3C</acronym></a><sup>®</sup> (<a
href="http://www.csail.mit.edu/"><acronym
title="Massachusetts Institute of Technology">MIT</acronym></a>, <a
href="http://www.ercim.eu/"><acronym
title="European Research Consortium for Informatics and Mathematics">ERCIM</acronym></a>,
<a href="http://www.keio.ac.jp/">Keio</a>), All Rights Reserved. W3C <a
href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
<a
href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a>
and <a href="http://www.w3.org/Consortium/Legal/copyright-documents">document
use</a> rules apply.</p>
<hr />
</div>

<div>
<h2><a id="abstract" name="abstract">Abstract</a></h2>

<p>Computer Graphics Metafile (CGM) is an ISO standard, defined by ISO/IEC
8632:1999, for the interchange of 2D vector and mixed vector/raster graphics.
WebCGM is a profile of CGM, which adds Web linking and is optimized for Web
applications in technical illustration, electronic documentation, geophysical
data visualization, and similar fields. First published (1.0) in 1999, WebCGM
unifies potentially diverse approaches to CGM utilization in Web document
applications. It therefore represents a significant interoperability agreement
amongst major users and implementers of the ISO CGM standard.</p>

<p>The design criteria for WebCGM aim to balance graphical expressive power on
the one hand, versus simplicity and implementability on the other. A small but
powerful set of standardized metadata elements supports the functionalities of
hyperlinking and document navigation, picture structuring and layering, and
enabling search and query of WebCGM picture content.</p>

<p>The present version, WebCGM 2.1, refines and completes the features of the
major WebCGM 2.0 release. WebCGM 2.0 added a DOM (API) specification for
programmatic access to WebCGM objects, a specification of an XML Companion File
(XCF) architecture, and extended the graphical and intelligent content of
WebCGM 1.0.</p>

<h2><a id="status" name="status">Status of this Document</a></h2>

<p><em>This section describes the status of this document at the time of its
publication. Other documents may supersede this document. A list of current W3C
publications and the latest revision of this technical report can be found in
the <a href="http://www.w3.org/TR/">W3C technical reports index</a> at
http://www.w3.org/TR/.</em></p>

<p>This is the <a
href="http://www.w3.org/2005/10/Process-20051014/tr.html#RecsW3C">Recommendation</a>
of the WebCGM 2.1. This document is a product of the <a
href="http://www.w3.org/Graphics/WebCGM/WG/">WebCGM Working Group</a> as part
of the <a href="http://www.w3.org/Graphics/Activity">Graphics Activity</a>.</p>

<p>This specification was produced jointly by <a
href="http://www.oasis-open.org/">OASIS</a> and <a
href="http://www.w3.org/">W3C</a> and published on 01 March 2010 by both
organizations. It is published simultaneously as an <a
href="http://www.oasis-open.org/specs/index.php">OASIS Standard</a> and a W3C
<a
href="http://www.w3.org/2005/10/Process-20051014/tr.html#RecsW3C">Recommendation</a>.
The two documents have identical normative technical content, with only cover
page, editorial and formatting differences as appropriate to the two
organizations.</p>

<p>Known implementations are documented in the public <a
href="http://www.w3.org/Graphics/WebCGM/2009/WebCGM21/implementation-report.html"
name="WebCGM" id="WebCGM">WebCGM 2.1 implementation report.</a> A test suite is
also available via the <a
href="http://www.w3.org/Graphics/WebCGM/2009/WebCGM21/testsuite21.html">WebCGM
2.1 Test Suite</a> page.</p>

<p>This WebCGM 2.1 edition incorporates all known errata as of the publication
date. The list of changes made since the Proposed Recommendation is available
in <a
href="http://www.w3.org/Graphics/WebCGM/drafts/REC/WebCGM21-Appendix.html#webcgm_changelog">Appendix
D1.</a></p>

<p>Please report errors in this document to the public email list <a
href="mailto:public-webcgm@w3.org?subject=[REC Comment]">public-webcgm@w3.org</a>
(<a href="http://lists.w3.org/Archives/Public/public-webcgm/">public
archive</a>). Use "[REC Comment]" in the subject line of your email.</p>

<p>The original Recommendation document (dated 01 March 2010) was updated on 24
august 2010. Wrong links in the following Table of Content and in the above
non-normative formats (zip file<a
href="http://www.w3.org/TR/2010/REC-webcgm21-20100301/WebCGM21.zip"></a> and
single HTML file) were corrected to relative links. A <a
href="http://www.w3.org/TR/2010/REC-webcgm21-20100301/Overview-original.html">copy
of the original Recommendation cover page</a> is archived.</p>

<p>WebCGM 2.1 is related to the previous W3C work on WebCGM 1.0 and 2.0. <a
href="http://www.w3.org/TR/2007/REC-webcgm20-20070130/">WebCGM 2.0</a> was
simultaneously published by W3C as a Recommendation and by OASIS as an OASIS
Standard. The two versions are identical in technical content, differing only
in the formatting and presentation conventions of the two organizations.</p>

<p>This WebCGM 2.1 specification was initially based on a work by the same
name, <a
href="http://docs.oasis-open.org/webcgm/v2.1/cs01/webcgm-v2.1-index.html">WebCGM
2.1 an OASIS Committee Specification</a>.</p>

<p>This document has been reviewed by W3C Members, by software developers, and
by other W3C groups and interested parties, and is endorsed by the Director as
a W3C Recommendation. It is a stable document and may be used as reference
material or cited from another document. W3C's role in making the
Recommendation is to draw attention to the specification and to promote its
widespread deployment. This enhances the functionality and interoperability of
the Web.</p>

<p>This document was produced by a group operating under the <a
href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 W3C
Patent Policy</a>. W3C maintains a <a rel="disclosure"
href="http://www.w3.org/2004/01/pp-impl/39256/status">public list of any patent
disclosures</a> made in connection with the deliverables of the group; that
page also includes instructions for disclosing a patent. An individual who has
actual knowledge of a patent which the individual believes contains <a
href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential
Claim(s)</a> must disclose the information in accordance with <a
href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section
6 of the W3C Patent Policy</a>.</p>
</div>

<div>
<h2><a id="contents" name="contents">Table of Contents</a></h2>

<p class="normal"><a
href="WebCGM21-TOC.html">Detailed
Table of Contents</a></p>

<p class="titlepageinfodescription">1.0 <a
href="WebCGM21-Intro.html">Introduction
to WebCGM</a></p>

<p class="titlepageinfodescription">2.0 <a
href="WebCGM21-Concepts.html">WebCGM
Concepts</a></p>

<p class="titlepageinfodescription">3.0 <a
href="WebCGM21-IC.html">WebCGM
Intelligent Content</a></p>

<p class="titlepageinfodescription">4.0 <a
href="WebCGM21-XCF.html">WebCGM
XML Companion File (XCF)</a></p>

<p class="titlepageinfodescription">5.0 <a
href="WebCGM21-DOM.html">WebCGM
Document Object Model (DOM)</a></p>

<p class="titlepageinfodescription">6.0 <a
href="WebCGM21-Profile.html">WebCGM
Profile</a></p>

<p class="titlepageinfodescription">7.0 <a
href="WebCGM21-Conf.html">Conformance</a></p>

<p class="titlepageinfodescription">8.0 <a
href="WebCGM21-ECMA.html">ECMAScript
binding</a></p>

<p class="titlepageinfodescription">9.0 <a
href="WebCGM21-Config.html">Application
Configurable Items</a></p>

<p class="titlepageinfodescription"><a
href="WebCGM21-Appendix.html">Appendices</a></p>
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