What are Web Services? Web Services are standards-based, interoperable, self contained, modular applications that can be described, published, located and invoked over the internet Web Services can be new applications or expose existing legacy systems using new XML based protocol Services can rely on other services to achieve the goals and participate in a Business Process There are three fundamental standards b Web Services are described with WSDL (Web Services Definition Language) b Web Services usually are conveyed using the SOAP XML b Web Services may be discovered using UDDI IBM Software Group I Web Sphere software Tying Web Services Registry 2. Find MSDL SOAP Provider2 IBM Software Group | WebSphere software WebSphere Application Server v6 3 What are Web Services? ƒ Web Services are standards-based, interoperable, self￾contained, modular applications that can be described, published, located, and invoked over the internet  Web Services can be new applications or expose existing legacy systems using new XML based protocol  Services can rely on other services to achieve the goals and participate in a Business Process ƒ There are three fundamental standards  Web Services are described with WSDL (Web Services Definition Language)  Web Services usually are conveyed using the SOAP XML Messaging protocol  Web Services may be discovered using UDDI IBM Software Group | WebSphere software WebSphere Application Server v6 4 Tying Web Services 2. Find 1. Publish 3. Bind (invoke) SOAP WSDL Service Requestor Service Provider Service Registry - UDDI - Note: Service Registry is Optional. The Requestor may get WSDL from other places than the Registry