ml.rng</code></a> uses
the modules to implement the union of <a
href="http://www.w3.org/TR/xhtml1/">XHTML 1.0</a> transitional and <a
href="http://www.w3.org/TR/xhtml1/">XHTML 1.0</a> frameset.  You can
<a href="http://www.thaiopensource.com/download">download</a>
everything as part of the main Jing distribution.  To create a custom
version of XHTML, simply copy <code>xhtml.rng</code> and delete the
inclusions of the modules that you do not want.</p>

<p>The biggest difference between the RELAX NG 