h2>

<p>A conforming user agent must meet all of the following
criteria:</p>

<ol>
<li>In order to be consistent with the XML 1.0 Recommendation <a
href="#ref-xml">[XML]</a>, the user agent must parse and evaluate
an XHTML document for well-formedness. If the user agent claims
to be a validating user agent, it must also validate documents
against their referenced DTDs according to <a href="#ref-xml">
[XML]</a>.</li>

<li>When the user agent claims to support <a href="#facilities">
facilities</a> defined wit