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Subject: Summary of issues: WI#10. Parameters for Combining Algorithms
This is my understanding of where we are on WI#10 (combining algorithm parameters). Could people clarify if I have gotten any of this wrong or if I have left something out? APPROVED: a) Schema will be as specified in http://lists.oasis-open.org/archives/xacml/200403/msg00125.html except that <AttributeValue> will be replaced with <Expression> (per WI#7), which could be a <ConditionReference>. b) <CombinerParameter> <AttributeValue>/<Expression> elements will have a DataType so the PDP can completely evaluate the value before passing it to the CombiningAlgorithm. b) <CombinerParameters> are children of the <Policy>, not of the <Rule>; i.e. they are specified outside the <Rule> elements to which they apply. ISSUE: How are <CombinerParameters> elements and the <CombinerParameter> elements within them associated with particular <Rule> elements? Options: a) Left completely up to the CombiningAlgorithm. Polar's preference. b) Specified order: all <CombinerParameter> elements in the 1st <CombinerParameters> element are associated with the 1st <Rule>, the 2nd <CombinerParameters> are associated with the 2nd <Rule>, etc. c) Specified in <CombinerParameters> metadata. E.g. <CombinerParameters ParameterRef="Rule5"> <CombinerParameter ParameterName="p1".../> <CombinerParameter ParameterName="p2".../> </CombinerParameters> <CombinerParameters ParameterRef="Rule2"> <CombinerParameter ParameterName="p1".../> <CombinerParameter ParameterName="p2".../> </CombinerParameters> Anne -- 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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