... Web Services, Clients, and Proxies You have seen that a Web service uses SOAP to provide a mechanism for receiving requests and sending back results. SOAP uses ... protocol used by Web servers and browsers. This is what makes Web services so powerful—HTTP and XML are well understood (in theory anyway) and are the subjects of several standards committees. ... the Web service running the Web method. 2. Perform a Web Services Description Language (WSDL) inquiry using the URL to obtain a description of the Web methods available, the parameters used, and...