To support facet based label, we had introduced custom markup. YUI ARIA plugin is written on specific markup hierarchy that is why it doesn't work our markup.

As we support facet based label so we renders 'div' for tab label container which obviously are not focusable. To add the ARIA support first we have to make these divs focusable.

To make it sure if the ARIA role are being render on proper markup, I gathered the following markup which is using YUI tabset and Sparkle tabset with and without label facet. It shows that roles are being applied properly.

YUI Tabset:
<div class="yui-navset yui-navset-top" id="demo">
<ul class="yui-nav" role="tablist">
<li role="presentation" title="active" class="selected">
<a tabindex="-1" id="yui-gen0" role="tab">
<em>Tab One Label</em>
</a>
</li>
<li role="presentation" title="">
<a tabindex="-1" id="yui-gen1" role="tab">
<em>Tab Two Label</em>
</a>
</li>
</ul>
<div class="yui-content">
<div id="tab1" role="tabpanel" labelledby="yui-gen0"><p>Tab One Content</p></div>
<div id="tab2" role="tabpanel" labelledby="yui-gen1" class="yui-hidden"><p>Tab Two Content</p></div>
<div id="tab3" role="tabpanel" labelledby="yui-gen2" class="yui-hidden"><p>Tab Three Content</p></div>
</div>
------------------------------

Sparkle Tabset without label facet:
<div class="yui-navset yui-navset-top">
<ul class="yui-nav" role="tablist">
<li class="selected" title="active" role="presentation">
<div class="yui-navdiv" tabindex="0" id="yui-gen0" role="tab">
<em>
Tab contents
<a style="visibility: hidden;"></a>
</em>
</div>
</li>
<li role="presentation">
<div class="yui-navdiv" tabindex="-1" id="yui-gen1" role="tab">
<em>
Disabled tab
<a style="visibility: hidden;"></a>
</em>
</div>
</li>
</ul>
<div id="j_idt8:j_idt10cnt" class="yui-content">
<div id="j_idt8:j_idt11" class="" role="tabpanel" labelledby="yui-gen0">
YUI generally
</div>
<div id="j_idt8:j_idt13" class="yui-hidden" role="tabpanel" labelledby="yui-gen1">
The TabView control
</div>
</div>
<div>
------------------------

Sparkle Tabset with label facet:
<div class="myTab yui-navset yui-navset-top">
<ul class="yui-nav" role="tablist">
<li class="selected" title="active" role="presentation">
<div class="yui-navdiv" tabindex="0" id="yui-gen3" role="tab">
<em>
Tab is using
<a style="visibility: hidden;"></a>
</em>
</div>
</li>
<li role="presentation">
<div class="yui-navdiv" tabindex="-1" id="yui-gen4" role="tab">
<em>
Disabled tab
<a style="visibility: hidden;"></a>
</em>
</div>
</li>
</ul>
<div class="yui-content">
<div id="j_idt8:j_idt20" class="" role="tabpanel" labelledby="yui-gen3">
test contents
</div>
<div id="j_idt8:j_idt23" class="yui-hidden iceOutConStatActv" role="tabpanel" labelledby="yui-gen4">
 
</div>
</div>
</div>

Modified: D:\work\development\head\svn\ossrepo\icefaces\scratchpads\sparkle\component\resources\org.icefaces.component.util\util.js
Modified: D:\work\development\head\svn\ossrepo\icefaces\scratchpads\sparkle\component\src\org\icefaces\component\tab\TabMeta.java
Modified: D:\work\development\head\svn\ossrepo\icefaces\scratchpads\sparkle\component\src\org\icefaces\component\tab\TabSetRenderer.java
Sending content: D:\work\development\head\svn\ossrepo\icefaces\scratchpads\sparkle\component\src\org\icefaces\component\tab\TabSetRenderer.java
Sending content: D:\work\development\head\svn\ossrepo\icefaces\scratchpads\sparkle\component\src\org\icefaces\component\tab\TabMeta.java
Sending content: D:\work\development\head\svn\ossrepo\icefaces\scratchpads\sparkle\component\resources\org.icefaces.component.util\util.js
Completed: At revision: 21056