对于单个服务定义多个服务端点的能力。
定义为单个服务接口一部分的操作应该从语义上相关。
Operations defined as part of a single service interface should be semantically related.
初始原型仅限于单个服务请求，如上面的示例中所示。
The initial prototype was limited to a single service request, as shown in the above example.
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