Web Services Deployment Cycle
A service provider describes its service in the form of a WSDL file. Typically, the WSDL file is obtained directly by the developer of the service client consumer.
At the time of the design of a Web service, the service consumer uses the WSDL to generate a proxy in his own native development environment, allowing him to program interactions with the service provider.
At run time the following occurs:
The service consumer formats a request in accordance with the WSDL definition.
The service provider provides the expected response to the service consumer.