Next, we consider the design principles that apply to the specification of services as a whole rather than to individual operations.
接下来，我们将讨论适用于整个服务（而不是各个操作）规范的设计原则。
Often, the resulting use cases are analogous to services, so specification of the use cases is the first step in the specification of services.
所得到的用例经常与服务类似，因此，指定用例是指定服务的第一步。
The introduction of the Unified Modeling Language (UML) was long-anticipated, because it contains certain design elements that lend themselves well to the specification of services.
统一建模语言(Unified Modeling Language, UML)的引入是期待已久的了，因为它包含了符合服务规范的特定设计要素。
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