[XHTML-Role] Remove role attribute in http://www.w3.org/1999/xhtml namespace

Hi,

As Aaron Leventhal and I have discussed, we (Opera and Mozilla) will  
remove support for the role attribute in the http://www.w3.org/1999/xhtml  
namespace and only keep support for the role attribute in no namespace on  
elements in the http://www.w3.org/1999/xhtml namespace. Therefore we  
suggest to update the spec accordingly.

Suggested spec changes:

   * Remove the second list item from the document conformance criteria.
     (Note that it is inappropriate to require a namespace *declaration* --
     it should be permissable to build up a DOM using scripting and DOM
     APIs with the correct namespaces but no namespace declarations.)

   * Remove the host language conformance class. The only host language
     that this Module will apply to is XHTML 1.1.

Cheers,
-- 
Simon Pieters
Opera Software