model-declared function
A model-declared function is a function that is declared in a conceptual model, but is not defined in that conceptual model. The function might be defined in the hosting or storage environment. For example, a model-declared function might be mapped to a function that is defined in a database, thus exposing server-side functionality in the conceptual model.
The declaration of a model-declared function contains the following information:
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The name of the function. (Required)
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The type of the return value. (Optional)
Note: If no return value is specified, the return type is void. -
Parameter information, including parameter name and type. (Optional)
Example
The ADO.NET Entity Framework uses a domain-specific language (DSL) called conceptual schema definition language (CSDL) to define conceptual models. In CSDL, one implementation of a model-declared function is a function import. The following CSDL defines an entity container with a function import definition. Note that the return type for the function is void since no return type is specified.
<FunctionImport Name="UpdatePublisher"> <Parameter Name="PublisherId" Mode="In" Type="Int32" /> <Parameter Name="PublisherName" Mode="In" Type="String" /> </FunctionImport>
See Also
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