[OASIS Issue Tracker] (ODATA-1400) Clarify that Validation.DerivedTypeConstraint can be used to restrict Edm.Untyped

Ralf Handl created ODATA-1400:
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             Summary: Clarify that Validation.DerivedTypeConstraint can be used to restrict Edm.Untyped
                 Key: ODATA-1400
                 URL: https://issues.oasis-open.org/browse/ODATA-1400
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: Improvement
          Components: Vocabularies
         Environment: Proposed
            Reporter: Ralf Handl


Type Edm.Untyped is ["conceptually an abstract base type for any OData type"|[https://docs.oasis-open.org/odata/odata-csdl-xml/v4.01/odata-csdl-xml-v4.01.html#sec_BuiltInAbstractTypes].]

This seems to imply that term [Validation.DerivedTypeConstraint|https://github.com/oasis-tcs/odata-vocabularies/blob/master/vocabularies/Org.OData.Validation.V1.md#DerivedTypeConstraint]Âcan be used to restrict this to a list of concrete(r) types.



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