Paul's xpath proposal

Paul, All,

Thanks Paul for the xpath proposal write up at

http://wiki.oasis-open.org/xacml/XpathDiscussion

Permanent link to the version I am discussing in this email:

http://wiki.oasis-open.org/xacml/XpathDiscussion?action=recall&rev=1

It seems mostly good as far as I understand it and does not appear to
have the performance issues that some of the ideas which have been
floating around earlier.

I have a few questions:

1. Regarding the request model, you propose a new element
Request/Content[@Category="general"]. Can't we make it
Request/Attributes[@Category="general"]/Content instead? It would have
the same capabilities and the benefit is that we don't need to change
the current schema or introduce new constructs to reach the new