[xacml] [schema] AttributeDesignators without XPATH

Attached is a concrete proposal for a possibly simpler
AttributeDesignator syntax.  It does not require XPATH, and is
capable of supporting other query formats.

It requires more work, but I want to see if people are interested
in pursuing this approach.

Anne
-- 
Anne H. Anderson             Email: 
Sun Microsystems Laboratories
1 Network Drive,UBUR02-311     Tel: 781/442-0928
Burlington, MA 01803-0902 USA  Fax: 781/442-1692