End 元素 (Association SSDL)
在 Entity Data Model (EDM) 中,association 元素的 End 子元素指定由关联联系的实体。以下示例中的关联根据经理/员工关系连接 Employee 实体。关联的两端为同一类型,由赋值语句 Type="AdventureWorks.Store.Employee" 指定。
<Association Name="FK_Employee_Employee_ManagerID">
<End Role="Employee" Type="Adventureworks.Store.Employee"
Multiplicity="0..1" />
<End Role="Employee1" Type="Adventureworks.Store.Employee"
Multiplicity="*" />
<ReferentialConstraint>
<Principal Role="Employee">
<PropertyRef Name="EmployeeID" />
</Principal>
<Dependent Role="Employee1">
<PropertyRef Name="ManagerID" />
</Dependent>
</ReferentialConstraint>
</Association>