Interface driver, constraint, and timing rules, modeled using interaction or sequence diagrams.

接口驱动器、约束和计时规则，通过交互或时序图进行建模。

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For example, a constraint might be that the design will use a relational database or interface to an existing system.

例如，约束可能是设计将在现在系统上使用关系数据库或者接口。

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ConstraintValidator: This is the interface implemented by a constraint validation implementation.

ConstraintValidator：这是一个接口，具体的约束验证类需要实现该接口。

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