d>Rendering is the act whereby the information in a <span
class="term">document</span> is presented. This presentation is
done in the form most appropriate to the environment (e.g.
aurally, visually, in print).</dd>

<dt>User Agent</dt>

<dd>A user agent is an <span class="term">implementation</span>
that retrieves and processes XHTML documents. See <a href=
"#uaconf">User Agent Conformance</a> for more information.</dd>

<dt>Validation</dt>

<dd>Validation is a process whereby <span class="term">
documents