服务操作能够被设计用作输入、输出、和错误消息，但是这并不是必须的，而且还将导致不合需要的邮戳数据耦合。
Service operations can be designed to use single input, output, and fault messages, but this is not necessary, and can result in undesirable stamp data coupling.
特别的是，您将能够设计活动的输入数据和输出数据的结构。
In particular, you will be able to design the input and output data structure of activities.
为组件定义输入和输出数据签名时，也适用相同的原则；将其设计为在主要应用程序中能良好工作，仅在其使用发生大幅度变化时才对其进行更改。
The same applies when defining input and output data signatures for components; design them to perform well in the primary application, and change them only when their use changes significantly.
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