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Subject: [OASIS Issue Tracker] Commented: (TOSCA-43) Type versioning
[ http://tools.oasis-open.org/issues/browse/TOSCA-43?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=30957#action_30957 ] Derek Palma commented on TOSCA-43: ---------------------------------- In the Aug 9th meeting I pointed out that Since TOSCA uses a type system, the only way to create new types are to derive from an existing type or create a new type, which makes type versioning a monomer. The appropriate solution is to express types using best practices in encoding type systems in XML documents. > Type versioning > --------------- > > Key: TOSCA-43 > URL: http://tools.oasis-open.org/issues/browse/TOSCA-43 > Project: OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC > Issue Type: Sub-task > Components: Spec > Affects Versions: CSD04 > Reporter: Derek Palma > Assignee: Derek Palma > Fix For: CSD04 > > > Type versioning. A more general term is schema or type evolution. This idea would be applicable if a type A exists, and someone later wants to create a type A' which is intended to be like A but not A and not related in a typed manner . It is important to note that A' and A are completely different types with no way to reason the delta between them. If one wanted some type based on A, they'd create a subclass of A and specialize accordingly. The practical uses of schema versioning is usually to create a completely new set of types which offer a different set of semantics than the previous version, so this is more of a way of labeling schemas. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://tools.oasis-open.org/issues/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
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