Viewpoints allow framework users not only to separately address different stakeholders' concerns but also to maintain an integrated, consistent representation of the underlying design.
视点使框架用户不仅可以分别地处理不同涉众的关注而且还可以维持一个下面设计的完整，一致的表示。
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One of the easiest ways to create an SIP-enabled service is to use the representation state transfer (REST) design pattern through utilizing HTTP in a converged HTTP and SIP application.