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<!--#set var="revision" value="\$Id: about.html,v 1.21 2002-12-08 17:51:46 ville Exp $"
--><!--#set var="date" value="\$Date: 2002-12-08 17:51:46 $"
--><!--#set var="title" value="About the W3C MarkUp Validation Service"
--><!--#set var="relroot" value="./"
--><!--#include virtual="header.html" -->
<div>
<h2 id="skip">About This Service</h2>
<!-- @@@TODO: bring this paragraph up to date -->
<p>
<a href="./">The
<acronym title="World Wide Web Consortium">W3C</acronym>
MarkUp Validation Service</a> checks
<acronym title="HyperText Markup Language">HTML</acronym>
documents for conformance to
<acronym title="World Wide Web Consortium">W3C</acronym>
<acronym title="HyperText Markup Language">HTML</acronym> and
<acronym title="eXtensible HyperText Markup Language">XHTML</acronym>
Recommendations and other
<acronym title="HyperText Markup Language">HTML</acronym>
standards. Related resources include:
</p>
<ul>
<li><a title="Source Code for The W3C MarkUp Validation Service"
href="http://validator.w3.org/source/">Source code availability</a>.</li>
<li><a href="todo.html">The TODO list for The <acronym
title="World Wide Web Consortium">W3C</acronym>
MarkUp Validation Service</a>.</li>
<li><a href="http://lists.w3.org/Archives/Public/www-validator/">The
www-validator mailing list</a>.</li>
<li><a href="feedback.html">How to provide feedback on The
<acronym title="World Wide Web Consortium">W3C</acronym>
MarkUp Validation Service</a>.</li>
</ul>
</div>
<div id="others">
<h2>Other resources</h2>
<div>
<h3>Documentation & Specifications</h3>
<ul>
<li><a href="http://www.w3.org/MarkUp/"><acronym
title="World Wide Web Consortium">W3C</acronym>'s
<acronym title="HyperText Markup Language">HTML</acronym>
home page</a>.</li>
<li><a href="http://www.w3.org/TR/html401/">The <acronym
title="HyperText Markup Language">HTML</acronym> 4.01
specification</a>.</li>
<li><a href="http://www.w3.org/TR/xhtml1/"><acronym
title="eXtensible HyperText Markup Language">XHTML</acronym> 1.0:
The Extensible HyperText Markup Language</a>.</li>
<li><a href="http://www.w3.org/TR/xhtml11/"><acronym
title="eXtensible HyperText Markup Language">XHTML</acronym> 1.1:
Module-based <acronym
title="eXtensible HyperText Markup Language">XHTML</acronym></a>.</li>
</ul>
</div>
<div>
<h3>Online Tools & Other Validators</h3>
<ul>
<li>The <a
href="http://www.htmlhelp.com/tools/validator/"><acronym
title="Web Design Group">WDG</acronym>
<acronym title="HyperText Markup Language">HTML</acronym>
validator</a> is another excellent online validation service.</li>
<li><a href="http://arealvalidator.com/">A Real Validator</a>
is a shareware <acronym
title="HyperText Markup Language">HTML</acronym> syntax checker
for Windows systems, from the author of the <acronym
title="Web Design Group">WDG</acronym> validator.</li>
<li><a href="http://valet.webthing.com/">Site Valet</a> by Nick Kew
is a comprehensive set of Quality Assurance tools for checking and
monitoring your web sites.</li>
<li>Clean up your <acronym
title="HyperText Markup Language">HTML</acronym> using <a
href="http://www.w3.org/People/Raggett/tidy/"><acronym
title="HyperText Markup Language">HTML</acronym> tidy</a>
(or use Site Valet's <a href="http://valet.webthing.com/tidy/">web
interface to tidy</a>.)</li>
<li>Validate your <a href="http://www.w3.org/Style/CSS/"><acronym
title="Cascading Style Sheets">CSS</acronym></a> using
the <a href="http://jigsaw.w3.org/css-validator/"><acronym
title="World Wide Web Consortium">W3C</acronym>
<acronym title="Cascading Style Sheets">CSS</acronym>
Validation Service</a>.</li>
<li>Validate your <a href="http://www.w3.org/RDF/"><acronym
title="Resource Description Framework">RDF</acronym></a> using
the <a href="http://www.w3.org/RDF/Validator/"><acronym
title="World Wide Web Consortium">W3C</acronym>
<acronym title="Resource Description Framework">RDF</acronym>
Validation Service</a>.</li>
<li>Validate your <a href="http://www.w3.org/XML/Schema"><acronym
title="eXtensible Markup Language">XML</acronym> Schema</a>
documents using the <a
href="http://www.w3.org/2001/03/webdata/xsv"><acronym
title="World Wide Web Consortium">W3C</acronym>
<acronym title="eXtensible Markup Language">XML</acronym>
Schema Validator</a>.</li>
</ul>
</div>
</div>
<div id="credits">
<h2>Credits</h2>
<p>
The <acronym title="World Wide Web Consortium">W3C</acronym>
MarkUp Validation Service was created and maintained by
<a title="Gerald Oskoboiny's Home Page"
href="http://www.w3.org/People/Gerald/">Gerald Oskoboiny</a>.
In a previous incarnation it was known as "The Kinder, Gentler,
<acronym title="HyperText Markup Language">HTML</acronym> Validator",
but has since found a new home at <acronym
title="the World Wide Web Consortium">W3C</acronym>, and is now maintained
under the auspices of the <a href="http://www.w3.org/QA/">Quality Assurance</a>
Activity.
</p>
<p>
This service uses:
</p>
<ul>
<li>
A derivative version of <a href="http://www.jclark.com/">James
Clark</a>'s excellent <a href="http://www.jclark.com/sp/"><acronym
title="Standard Generalized Markup Language">SGML</acronym> (and
<acronym title="eXtensible Markup Language">XML</acronym>)
parser</a> <acronym title="SGML Processor">SP</acronym>. The
version in use for this service is the "OpenSP" version from
the <a href="http://openjade.sourceforge.net/">OpenJade</a> team.
For some time it also made use of
<a href="http://www.htmlhelp.com/%7Eliam/">Liam Quinn</a>'s
modified version, lq-nsgmls.
</li>
<li>
The <a href="http://www.linpro.no/lwp/"><acronym
title="libwww-perl">LWP</acronym> Perl Modules</a>
by Gisle Aas and Martijn Koster for retrieving documents.
</li>
<li>Documentation and Error Explanations originally written by Scott Bigham.</li>
<li>Open source software including <a
href="http://httpd.apache.org/">Apache</a>, <a
href="http://www.perl.com/">Perl</a>, and <a
href="http://www.debian.org/">Debian GNU/Linux</a>.<a
href="http://www.debian.org/"><img
style="float: right; clear: both; width: 88px; height: 30px"
src="images/debian.png" alt="[Powered by Debian]" /></a>
</li>
<li>
Patches and ideas from:
<ul>
<li><a href="http://www.aaronsw.com/">Aaron Swartz</a></li>
<li><a href="http://bjoern.hoehrmann.de/">Björn Höhrmann</a></li>
<li><a href="http://www.smith-family.com/">Christian Smith</a></li>
<li><a href="http://www.w3.org/People/Connolly/">Dan Connolly</a></li>
<li><a href="http://www.w3.org/People/Hugo/">Hugo Haas</a></li>
<li><a href="http://www.jibbering.com/">Jim Ley</a></li>
<li><a href="http://www.w3.org/People/karl/">Karl Dubost</a></li>
<li><a href="http://www.htmlhelp.com/%7Eliam/">Liam Quinn</a></li>
<li><a href="http://www.w3.org/People/D%c3%bcrst/">Martin Dürst</a></li>
<li><a href="http://www.webthing.com/~nick/">Nick Kew</a></li>
<li><a href="http://www.w3.org/People/olivier/">Olivier Thereaux</a></li>
<li><a href="http://purl.org/net/sbp/">Sean B. Palmer</a></li>
<li><a href="http://newsreaders.com/%7Elink/">Terje Bless</a></li>
<li><a href="http://www.iki.fi/scop/">Ville Skyttä</a></li>
<li><a href="http://lists.w3.org/Archives/Public/www-validator/">...and
the nice people on www-validator@w3.org.</a></li>
</ul>
</li>
</ul>
</div>
<p>
The
<a href="http://lists.w3.org/Archives/Public/www-html/1994Jul/0015">first
online <acronym title="HyperText Markup Language">HTML</acronym> validation
service</a> was created by
<a href="http://www.w3.org/People/Connolly/">Dan Connolly</a> and
<a href="http://www.markgaither.com/">Mark Gaither</a>.
</p>
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