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Subject: [OASIS Issue Tracker] Commented: (SCAPOLICY-2) Simplify policySet model?


    [ http://tools.oasis-open.org/issues/browse/SCAPOLICY-2?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=29416#action_29416 ] 

David Booz commented on SCAPOLICY-2:
------------------------------------

opened Feb 1,2010 telecon


> Simplify policySet model?
> -------------------------
>
>                 Key: SCAPOLICY-2
>                 URL: http://tools.oasis-open.org/issues/browse/SCAPOLICY-2
>             Project: OASIS Service Component Architecture / Policy (SCA-Policy) TC
>          Issue Type: Bug
>          Components: 1.2 Spec
>    Affects Versions: V1.2
>            Reporter: David Booz
>
> Target: SCA Policy FW spec V1.1 (cd02-rev7)
> Description:
> 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.

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