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Subject: NEW ISSUE: Simplify policySet model?
On last Monday's call, during the discussion of Issue-93, we discussed a couple of possible simplifications of the policySet model. As background, policySets can be attached either directly to SCDL elements of using External Attachment on SCDL elements selected by the XPath in the attachTo attribute. The following paragraph discusses the interaction between these two attachment mechanisms. "SCA runtimes MUST support at least one of the Direct Attachment and External Attachment mechanisms for policySet attachment. [POL40010 <#POL40010>] SCA implementations supporting only the External Attachment mechanism MUST ignore the policySets that are applicable via the Direct Attachment mechanism. [POL40011 <#POL40011>] SCA implementations supporting only the Direct Attachment mechanism MUST ignore the policySets that are applicable via the External Attachment mechanism. [POL40012 <#POL40012>] SCA implementations supporting both Direct Attachment and External Attachment mechanisms MUST ignore policySets applicable to any given SCA element via the Direct Attachment mechanism when there exist policySets applicable to the same SCA element via the External Attachment mechanism [POL40001 <#POL40001>]." The two ideas that came up were: 1. If both Direct Attachment and External Attachment are used, the policySets attached by these two mechanisms are unioned together. Mike pointed out that this removes that capability of overriding Directly attached policySets by EXtrenally attached policySets. 2. Remove the Direct Attachment mechanism for policySets. Some may feel that it is a bit late in the spec cycle to be making such fundamental changes but let's have a discussion and decide what we want to do. Ashok
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