[xacml] Subject Attribute

[Polar Humenn <polar@syr.edu>]

I suggest that we change the current SubjectAttributeDesignatorType to


CategorizedSubjectAttributeDesignatorType

and have

CategorizedSubjectAttributeDesignator


and keep the SubjectAttributeDesignator a simple instantiation of
AttributeDesignatorType as it was before we added the SubjectCategory
attribute.

What do you say?
-Polar