Passing parameters to the attribute designator

I believe there must 
be a case when the context handler must be given additional information to 
retrieve an attribute when using attribute designators. This additional 
information may be kept within the policies that reference the designator and 
will serve as parameters to the evaluation procedure of the designator. 
Naturally, this applies to only those cases when the attribute referenced is 
not actually present in the request context as XACMLv2.0 specification 
mentions how the referenced attributes must be matched when present in the 
request context.

 

This additional 
context passed to the handler can be a property list/name-value pairs as 
the combiner parameters.

 

Thoughts 
?

 

Regards,

Anil