<h4><dfn>Annotations for assistive technology products</dfn> (ARIA)</h4>
<h4><dfn>WAI-ARIA</dfn></h4>
<p>Authors may use the ARIA <code title="attr-aria-role">role</code>
and <code title="attr-aria-*">aria-*</code> attributes on <span>HTML
<div class="impl">
<!--END html--><!--END dev-html--><!--END complete--><!--END epub--><!-- EDITORIAL: this paragraph is redundant with WAI-ARIA and doesn't really make any sense anyway; see bug 9437 -->
<p>The WAI-ARIA specification neither requires or forbids user
agents from enhancing native presentation and interaction behaviors
on the basis of WAI- ARIA markup. Even mainstream user agents might
choose to expose metadata or navigational features directly or via
user-installed extensions; for example, exposing required form
fields or landmark navigation. User agents are encouraged to
maximize their usefulness to users, including users without