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Subject: NEW ISSUE: Extensibility of Intents
This comes out of a discussion of POLICY-97 from this Monday's call. The question has to do with who can extend intent definitions and the consequences of such extensions. The spec currently says: "SCA normatively defines a set of core intents that all SCA implementations are expected to support, to ensure a minimum level of portability. Users of SCA can define new intents, or extend the qualifier set of existing intents." To me, this says that vendors can add their own intents and perhaps additional qualifiers to the intents defined in the Policy Framework specification. We understand that these extensions will not be interoperable. Vendors cannot change the default qualifier for intents defined in the Policy Framework spec. The other discussion thread was about changes in intent definitions -- new intents, new qualifiers, changes in defaults -- that would occur in future versions of the Policy Framework specification. Clearly, such changes may occur and I argued that this should change the namespace of the specification and, in effect, create a new version of the spec. So, two questions: 1. Do we need to clarify the extensions that vendors can make? 2. Do we need to discuss changes that may occur in future versions of the Policy Framework specification? Note that we don't talk about such evolution in other sister SCA specs. -- All the best, Ashok
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