Next up in Listing 2 is the @IdClass annotation, which defines the composite key class reference.

清单2中的下一个注释是 @IdClass，它定义组合键类引用。

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Version 2.0 of the EJB specification defines a primary key class as any class that is a legal value type in RMI-IIOP.

EJB规范的 2.0版将主键类定义成任何是 RMI-IIOP中合法值类型的类。

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And we design real estate transaction subsystem from the use case view, logical view, dynamic view, key class diagrams, deployment view in detail.

并且针对房产交易登记子系统，对该子系统从用例视图、逻辑视图、动态视图、关键类图、部署视图等方面进行详细设计。

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And we design real estate transaction subsystem from the use case view, logical view, dynamic view, key class diagrams, deployment view in detail.

并且针对房产交易登记子系统，对该子系统从用例视图、逻辑视图、动态视图、关键类图、部署视图等方面进行详细设计。

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