Consider ability to define computed default values

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    • Type: New Feature
    • Resolution: Fixed
    • Priority: Major
    • None
    • Affects Version/s: V4.01_WD01
    • Component/s: Vocabularies
    • None
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      OASIS standard term Core.ComputedDefaultValue allows tagging properties that have a computed default value without revealing the underlying (and arbitrarily complex) algorithm.

      Vendor-specific experimental term Common.DerivedDefaultValue allows clients to call server-side logic for computing the default value for a provided context.

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      OASIS standard term Core.ComputedDefaultValue allows tagging properties that have a computed default value without revealing the underlying (and arbitrarily complex) algorithm. Vendor-specific experimental term Common.DerivedDefaultValue allows clients to call server-side logic for computing the default value for a provided context.

      Currently, default values for properties and (now, as of ODATA-1066) parameters are static values.

      There are some cases where the default value may be the result of a calculation. Examples:
      1) The value of a related property/parameter
      2) An expression based on the value of one (or more) related properties/parameters
      3) The result of invoking a function(import) on the service (with params?)

      Issues:
      -how to express the value of the defaultvalue (use Edm.Untyped? – this could only be supported in 4.01)
      -what is the syntax of the expression?
      -can it invoke a funciton(import) and, if so, how are parameters passed?

      For parameters, could define a derived OptionalParameterType that has a DefaultValueExpression that is Edm.Untyped and only returned as that derived type in a 4.01 payload.

            Assignee:
            Unassigned
            Reporter:
            Michael Pizzo (Inactive)
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              Created:
              Updated:
              Resolved: