target attribute

At the risk of starting a long debate...  @target is defined in the 
hypertext attributes module.  I believe this should be moved into a 
target attribute module so that it can be more easily omitted from 
languages that do not want to support it.

Please let's try to keep as a separate topic whether @target should be 
in XHTML M12N 2.0 at all.  Even if we mark it as legacy, I think that it 
still needs to be in there somewhere.
-- 
Shane P. McCarron                          Phone: +1 763 786-8160 x120
Managing Director                            Fax: +1 763 786-8180
ApTest Minnesota                            Inet: shane@aptest.com