IEEE Distributed Systems Online

Unraveling the web services Web: An introduction to SOAP, WSDL, and UDDI


The specifications developed in the three areas such as communication protocols, service descriptions, and services discovery of web services, are discussed. The specifications include the simple object access protocol (SOAP), web services description language (WSDL) and the universal description, discovery, and integration (UDDI). SOAP is an XML-based protocol for messaging and remote procedure calls (RPC). WSDL defines a service's abstract description in terms of messages exchanged in a service interaction. The UDDI offer users a unified and systematic way to find service providers through a centralized registry of services.