Re: [xacml] [policy model]: Object semantics proposal

[John Erickson <john_erickson@hplb.hpl.hp.com>]

Michiharu Kudoh writes:
> I think regex expressions could provide wider expressive power.
> What I worried about was there seems to be no standard or no de-fact
> standard for representing regular expression on tree structures.
> Moreover, there seems to be no available algorithms or software products.
> It could require a mechanism for making tree pattern matching and more.

I'm wondering if the OASIS RELAX-NG work, in part based upon James Clark's TREX
("Tree Regular Expressions"), would be helpful here. See:

http://www.oasis-open.org/committees/relax-ng/

or the current version of the spec at:

http://www.oasis-open.org/committees/relax-ng/spec-20010917.html

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