PROBLEM
The question is, when one policy references another, as in
referenced policy:
whether "xxxx" must equal "yyyy".
This question may also apply to Policy[Set]IdRef values in
CombinerParamters.
Please state what you want the spec to say, and why.
WHAT THE SPEC SAYS NOW
The XACML 2.0 Specification never flat-out states that the value used in
a Policy[Set]IdReference must match the value of the Policy[Set]Id
used in the referenced policy, and if so, does not state the algorithm
for doing the id matching. It says
"The