Publishing Web Service operations

Web services publish their operations and locations through a document that is written in an XML-based language called Web Services Description Language (WSDL).

WSDL documents specify:

• Operations that the web service offers. The collection of operations is called a port type.
• URL of the web service that IBM® DataStage® invokes. This information is represented by the service element.
• Structures for the web service request and response of each operation. These structures are called messages.
• Transport protocol for communication between a web service client and the web service. For example, SOAP over HTTP. This information is part of a binding.
• Mechanism for sending individual web service requests, such as RPCs. This is another part of a binding.