Web ServicesLesson 104Free preview

XML WSDL

This lesson is part of XML · All levels

Summary

WSDL or Web Services Description Language is an XML document that describes a web service: any operation available, the format of the message, the protocol used, and the endpoint address. Its structure consists of definitions, types, messages, portType, binding, and service. With WSDL, clients can understand how to call services without reading the server source code.

Key points

<wsdl:types> contains an XSD scheme for payloading messages
<wsdl:message> defines input and output of each operation
Clustering operations, similar to interface
<wsdl:binding> binds portType to protocols such as SOAP
<wsdl:service> determines the address of the service endpoint

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