<dd>

<p>In the context of user interfaces, an item in the perceptual user experience, represented in markup languages by one or more <a class="termref" data-lt="element">elements</a>, and rendered by <a class="termref" data-lt="user agent">user agents</a>.</p>

In the context of programming, the instantiation of one or more <a class="termref" data-lt="class">classes</a> and interfaces which define the general characteristics of similar objects. An object in an <a>accessibility <abbr title="Application Programming Interfaces">API</abbr></a> may represent one or more DOM objects. <a class="termref" data-lt="accessibility api">Accessibility APIs</a> have defined interfaces that are distinct from DOM interfaces.</dd>

<dt><dfn data-export="">Ontology</dfn></dt>

<dd>

<p>A description of the characteristics of <a class="termref" data-lt="class">classes</a> and how they relate to each other.</p>

<th class="role-inherited-head" scope="row">Inherited States and Properties:</th>

<td class="role-inherited"> </td>

</tr>

<tr>

<th class="role-namefrom-head" scope="row">Name From:</th>

</tr>

<tr>

<th class="role-namerequired-head" scope="row">Accessible Name Required:</th>