Concept of interface definition.
接口定义的概念。
Service specification or service interface definition design.
服务规格或者服务界面定义设计。
Now, it is time to build the WSDL interface definition of the web service.
现在，是时候构建Web服务的WSDL界面定义了。
A key area of design activity is in the service interface definition model.
设计活动的关键之处在于服务接口定义模型。
To stretch the definition a little further, consider a standard user interface.
为了进一步阐述这个定义，我们来看一个标准用户界面。
Clicking Next will bring up the Columns definition interface, as shown in Figure 3.
单击Next打开Columnsdefinition界面，如图3所示。
Service definition (the scope, interface, and boundaries of a service)
服务定义（服务的范围、接口和边界）
Service definition (the scope, interface, and boundaries of a service)
服务定义（服务的范围、接口和边界）
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