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Subject: Re: [xacml] [policy model]: Object semantics proposal
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 | John S. Erickson, Ph.D. | Hewlett-Packard Laboratories | PO Box 1158, Norwich, Vermont USA 05055 | 802-649-1683 (vox) 802-371-9796 (cell) 802-649-1695 (fax) | john_erickson@hpl.hp.com AIM/YIM/MSN: olyerickson
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