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Subject: RE: [xacml] Minutes of 20 May 2004 XACML Focus Group
Daniel, I can see your point. It seems like a trade-off. If we say that, unless profiled otherwise, hierarchical resources SHALL use a standard URI representation, then "default" resources can use the URI-match functions that can take advantage of the actual levels in the hierarchy. But legacy resources won't always fit into the URI representation easily and so will have to be profiled. If we do not specify a standard format, then XACML users can only take advantage of the URI representation if their resource is profiled. And people are more likely to come up with idiosyncratic ways of representing resources that could have been represented in a common format. I hope all file and web page resources would be specified using the URI representation, so we would have to write profiles for those two. I would like to hear from the rest of the TC on this. Anne On 21 May, Daniel Engovatov writes: RE: [xacml] Minutes of 20 May 2004 XACML Focus Group > I actually think that "being named in only one way" should be out of our > scope. That is a rather heavy requirement to impose on a system, one > that requires users to come up with mapping. In the same time, it does > not buy > You much more in terms of expressiveness for the hierarchical policy. > > It seems a little bit ambitious to try to define a universal naming > scheme, especially when it is not generally needed: for > interoperability it is no harder to use some particular naming > convention for hierarchy, - one has to use "some" naming convention in > any new system anyway. > > I would think imposing some mandatory format for the identifier is, how > would they say - "unduly burdensome" :) -- Anne H. Anderson Email: Anne.Anderson@Sun.COM Sun Microsystems Laboratories 1 Network Drive,UBUR02-311 Tel: 781/442-0928 Burlington, MA 01803-0902 USA Fax: 781/442-1692
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