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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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