The Web service request and response (the input and output messages) are validated against the WSDL at run time.

Web 服务请求和响应（输入和输出消息）在运行时根据 WSDL 进行验证。

youdao

We will define a message to be associated with the input request to the Web service, and a message to be associated with the output response from the Web service.

我们将定义一个消息，并将其与到该 Web 服务的输入请求相关联，定义另一个消息，使其与从该 Web 服务出来的输出相应相关联。

youdao