Web Service Definition Language

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Web Service Definition Language

(WSDL) An XML format for describing network services as a set of endpoints operating on messages containing either "document oriented" or "procedure oriented" information. The operations and messages are described abstractly, and then bound to a concrete network protocol and message format to define an endpoint. Related concrete endpoints are combined into abstract endpoints (services).

WSDL is typically used with SOAP over HTTP but it is extensible to allow description of endpoints and their messages independent of what message formats or network protocols.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
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Building upon SOAP (Simple Object Access Protocol) and WSDL (Web Service Definition Language), the OWL-S services can be dynamically executed on the Web.
In contrast to mechanical standards such as Web Service Definition Language (WSDL), which describes only the syntax that a service uses, ZeeRex attempts to encapsulate some of the semantics of the service: It describes not only how to talk to the service, but what kinds of things you can say once you've established a conversation.
UDDI uses a Web Service Description Language (WSDL) (Web Service Definition Language 2001).

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