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Subject: Minutes of 1 April 2004 XACML TC Meeting
XACML TC General Body Meeting Minutes 1 April 2004; Time: 10:00 AM EDT Attendees: Anne Anderson Hal Lockhart Michiharu Kudo Steve Anderson Michael McIntosh Tim Moses Simon Godik Daniel Engovatov Seth Proctor Polar Humenn Frank Siebenlist Bill Parducci Ed Coyne Tony Nadalin Quorum reached. Agenda: 1. Minutes from 18 March meeting voted upon. Move to accept: Michael. Second: Steve. Approved unanimously. 2. SAML/XACML Attribute Harmony Key issue: whether it is acceptable for XACML to meet some of the SAML attribute requirements, specifically re: ValueType. Data typing, desired by XACML, will not likely be adopted by SAML; discussion centered around willingness of committee to adopt ad hoc mappings during implementation. General feeling is that SAML adopters will likely require this functionality in the future, even though current implementations may not clearly see the need for such. Anne: suggest optional elements to address this issue. Hal: felt that optional attributes is worth defending back to SSTC, suggested discussion at next SSTC Focus Group call. The SSTC Focus Group call is Tuesday NOON (ET). 4. Documentation Update (Tim Moses) Draft 7 in circulation, still missing concrete proposal on a couple of proposals (Tim posted to list this morning). Draft 8 pending approval of a few remaining Work Items, so currently on hold. 6. Work Items (Anne Anderson) WI #7: Condition Reference Need to reach consensus (champions have not worked on since last TC call). Tim posted an alternative to Simon's proposal; Simon inquired into placement of elements; Tim could not find a mechanism to make structure FINAL, and consensus was to leave placement of variables freely interspersed. Move to accept as stated in Draft 7: Anne. Second: Tim. Approved unanimously. WI #10: Parameters for Combining Algorithms: Draft version in Draft 7. Michiharu & Polar still discussing on list. Issue will parameter sets be in the Type system. Polar suggests that it is better to keep parameters separate from algorithms for grouping and association. It is commonly agreed that there is a Type system, but there is significant dissension on the semantics of the sequence of CombinerParameters and how they are associated with <Rules>. That and the fact that Michiharu left the call earlier requires this to be brought to closure on the list. WI #18: Obligations in Rules Options are: 1) Force determinism in which Obligations will be returned by requiring evaluation of the entire policy tree at the cost of efficient evaluation of distributed policies. 2) Accept non-determinism by not requiring evaluation of entire tree, but allow determinism by use of the ordered-* versions of the combining algorithms. 3) Drop this work item. Note that XACML 1.1 allows users to control the trade off between determinism in which Obligations are returned and efficient evaluation of distributed policies by allowing use of the ordered-* versions of the combining algorithms. Polar is opposed to non-deterministic mechanisms in a standard. SEE LIST FOR MORE DETAILED REVIEW OF WORK ITEMS (Anne to post update) Meeting Adjourned.
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