hrough unmodified on the element on which it is declared in the final
 rendered markup. The attribute, if specified, must have a value that is a string literal that is, or an EL Expression
 that evaluates to, a set of space-separated tokens representing the various WAI-ARIA roles that the element belongs
 to.
 </p>

 <p class="changed_added_2_2">
 It is the page author's responsibility to ensure that the user agent is capable of correctly interpreting the value
 of this attribute.
 </p></dd>
</dl>
</section