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Subject: RE: [xacml] Groups - Changes Since XACML 1.0 (xacml_1.x_2.0_diffs_draft.doc) uploaded
>7. Datatypes: there is no "xpath-expression" datatype. I suggest that depending on the timeline for XACML 3.0 we may redefine those types until Xpath2.0/XQuery reaches W3C recommendation phase. It should enter candidate recommendation status on July meeting. Many popular Xpath implementations are already 2.0. That would be a good opportunity for us to revisit binding between Xpath/XQuery data model to XACML context anyway. Other potential use for this standard is that XQuery is a rather natural language to use to express policy recombination algorithms - using XML representation for the rule evaluation results. Standardizing on a language for recombination algorithms may make them more interoperable and easier to extend. Daniel;
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