I can't achieve to add a class in a facet :
<p:dataTable>
    <f:facet name="footer" class="myClass">
        <p>outch!</p>
    </f:facet>
</p:dataTable>
render :
<div class="ui-datatable-footer ui-widget-header ui-corner-bottom">
    <p>outch!</p>
</div>
perhaps it's not possible, but what can be the alternative to put myClass in the DIV class ?
Many thanks to any help ;-)
françois
Edit :
OK : facet have no attribut, so I'll try an other approch. thks all.