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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<head>
<title>W3C HTML Validation Service</title>
<link rev="made" href="mailto:gerald@w3.org">
<meta name="keywords" content="HTML, Hypertext Markup Language, Validation,
W3C HTML Validation Service">
<meta name="description" content="W3C's easy-to-use
HTML validation service, based on an SGML parser.">
</head>
<body bgcolor="#FFFFFF" text="#000000" link="#0000ee" vlink="#551a8b">
<p>
<a href="http://www.w3.org/"><img
src="http://www.w3.org/Icons/WWW/w3c_home" height=48 border=0
alt="W3C"></a>
</p>
<h1>W3C HTML Validation Service</h1>
<p>
Welcome to the W3C HTML Validation Service!
See <a href="whatsnew.html"><strong>what's new</strong></a>. (updated
August 26, 1998)
</p>
<p>
This is an easy-to-use HTML validation service based on an SGML
parser. It checks HTML documents for compliance with W3C HTML
Recommendations and other HTML standards.
</p>
<p>
To use the <a
href="http://www.w3.org/TR/REC-html40/">W3C HTML 4.0 Recommendation</a>,
start your document with one of the following doctype declarations:
</p>
<pre>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"
"http://www.w3.org/TR/REC-html40/strict.dtd">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
"http://www.w3.org/TR/REC-html40/loose.dtd">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN"
"http://www.w3.org/TR/REC-html40/frameset.dtd">
</pre>
<hr>
<h2><a name="byURI">Validate Documents by URI</a></h2>
<p>
Enter the location of a document you would like validated:
</p>
<form method=GET action="/check">
Location: <input name="uri" size=50><br>
<input name="weblint" type=checkbox value="">Include <a
href="http://www.cre.canon.co.uk/~neilb/weblint/">Weblint</a>
results
<input name="pw" type=checkbox value="">run Weblint
in "pedantic" mode<br>
<input name="ss" type=checkbox value="">Show source input
<input name="outline" type=checkbox value="">Show an outline of this
document<br>
<input name="sp" type=checkbox value="">Show parse tree
<input name="noatt" type=checkbox value="">don't show
attributes in the parse tree<br>
<input type="submit" value="Submit this URI for validation">
<input type="reset" value="Reset this form">
</form>
<hr>
<h2><a name="seeAlso">See Also</a></h2>
<ul>
<li><a href="whatsnew.html">Recent changes to this service</a></li>
<li><a href="news:comp.infosystems.www.authoring.html">The HTML
authoring newsgroup</a> (for help with HTML)
<li><a href="feedback.html">How to provide feedback on this service</a></li>
<li><a href="sgml-lib/catalog">DTDs (document types) supported by this
service</a> (the SGML catalog)</li>
<li><a href="todo.html">The to-do list for the service</a></li>
<li><a href="/source/">Information on the source code availability</a></li>
<li><a href="http://lists.w3.org/Archives/Public/www-validator/">The
www-validator mailing list archives</a></li>
<li><a href="http://www.w3.org/TR/REC-html40/">The W3C HTML 4.0
Recommendation</a>
<li><a href="http://www.w3.org/TR/REC-html32">The W3C HTML 3.2
Recommendation</a>
</ul>
<h2><a name="credits">Credits</a></h2>
<p>
This service uses:
</p>
<ul>
<li>
<a href="about.html">Hardware/network connectivity</a> provided by <a
href="http://www.compaq.com/">Compaq Computer Corporation</a>.
</li>
<li>
<a href="http://www.jclark.com/">James Clark</a>'s excellent <a
href="http://www.jclark.com/sp/">SGML parser</a>,
</li>
<li>
<a href="http://www.ics.uci.edu/~fielding/">Roy T. Fielding</a>'s <a
href="http://www.ics.uci.edu/pub/websoft/libwww-perl/">libwww-perl</a>
to retrieve documents,
</li>
<li>
<a href="http://www.cre.canon.co.uk/~neilb/">Neil Bowers</a>' HTML
style checker, <a
href="http://www.cre.canon.co.uk/~neilb/weblint/">Weblint</a>.
</li>
<li>
SGML <a href="http://www.cs.duke.edu/~dsb/kgv-faq/errors.html">error
explanations</a> maintained by <a
href="http://www.cs.duke.edu/~dsb/index.html">Scott Bigham</a>.
</ul>
<hr>
<address>
<a href="http://validator.w3.org/check/referer"><img
src="http://validator.w3.org/images/vh40.gif" height=31 width=88
align=right border=0 alt="Valid HTML 4.0!"></a>
<a href="/feedback.html">Gerald Oskoboiny</A><br>
$Date: 1998-12-16 11:44:47 $
</address>
</body>
</html>
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