tents of the element.</li> </ul> <p>If you specify attributes that are not known on a standard tag, a warning of type <code><a href="#CONDITION%20CLIP%3AUNKNOWN-ATTRIBUTE" class="xref">UNKNOWN-ATTRIBUTE</a></code> is signalled. If you do not specify a required attribute on a standard tag, an error of type <code><a href="#CONDITION%20CLIP%3AMISSING-ATTRIBUTE" class="xref">MISSING-ATTRIBUTE</a></code> is signalled.</p> <h2 id="standard_attributes">Standard Attributes</h2> <ul> <li><code>AS</code> <br> Simply 