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| 引用约束 (An element of an SSDL schema that specifies the direction of an association with FromRole and ToRole attributes. A referential constraint corresponds to a CSDL navigation property) | |||
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| 引用约束 (An element of an SSDL schema that specifies the direction of an association with FromRole and ToRole attributes. A referential constraint corresponds to a CSDL navigation property) | |||
