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Subject: [OASIS Issue Tracker] (ODATA-1060) Improve specification of element response requirements
George Ericson created ODATA-1060: ------------------------------------- Summary: Improve specification of element response requirements Key: ODATA-1060 URL: https://issues.oasis-open.org/browse/ODATA-1060 Project: OASIS Open Data Protocol (OData) TC Issue Type: New Feature Components: CSDL JSON , CSDL XML, Vocabularies Environment: Schema Reporter: George Ericson Assignee: George Ericson Element response requirements: There is ambiguity on the use and meaning of Nullable. The reason is a distinction between the semantics of Nullable and whether or not implementation is required. At least in one example, it is common practice to allow a Nullable=False property to be excluded from a response with the implied meaning of not implemented. The implementation requirement is not a term defined by OData. Proposal: 1) Add the following Term to Core: <Term Name="ImplementationRequired" Type="Core.Tag" DefaultValue="false"> <Annotation Term="Core.Description" String="If 'true', implementation of the qualified element is required. If the required element is Nullable and has no value, it may be omitted from a response. Otherwise it must be present in a related response." If an element is not required, it may be omitted from a related response. If an element is not required and is not Nullable and is not present in a response, it may be assumed to have not been implemented. If the element is Nullable and not present in a response, it may either have no value or have not been implemented." /> </Term> The following summarizes the above: a. Nullable=True, Implementation=Optional => Omission implies no value or not implemented b. Nullable=True, Implementation=Required => Omission implies no value c. Nullable=False, Implementation=Optional => Omission implies not implemented, the value is unknown. d. Nullable=False, Implementation=Required => Omission is not allowed, the property must indicate Null if no value. -- This message was sent by Atlassian JIRA (v6.2.2#6258)
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