EA&UML日拱一卒-活动图::14.4 ProtocolStateMachines

英文原文来自UML2.5，作者提供中文翻译。 14.4.1 Summary（概要） ProtocolStateMachines are used to express usage protocols. ProtocolStateMachines express the legal sequences of Event occurrences to which the Behaviors of an

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