In process of constructing EPRM, request-reply pattern is used widely and it can also be used to output this model.
询问-回答模式在该模型中得到了广泛应用，不仅在模型的构造过程中大量采用，模型的输出也采用该模式。
It can get the EPOM after the process of lexical analysis and syntax analysis, and then can construct the OSTPM according to EPOM using Request-Reply Pattern.
在对程序进行词法和语法分析后得到EPOM的情况下通过询问-回答的对象控制模式可以方便的构建OSTPM。
Message exchange pattern: data services could be accessed via the four primary message exchange patterns - request/reply (tight SLA), request/reply (relaxed SLA), fire/forget, and publish/subscribe.
消息交换模式：数据服务可以通过四种主要的消息交换模式被访问：请求-应答（严格SLA）、请求-应答（宽松SLA ），即发即弃和发布-订阅。
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