Web Services – SOAP and WSDL

In this chapter, SOAP and WSDL are explained as important standards that lay the foundation for standardized descriptions of messages and operations of a Web service. We first describe the core elements of SOAP and WSDL standards with examples, then present how the two standards are fit together to form the common message communication styles, namely RPC and Document. The chapter concludes with a practical exercise covering activities that build a simple Web service and its client application.