Web Service Description Language (WSDL) is an XML language that contains information about the interface and semantics of a call to a web service. The new section of the Dot-Com Builder web site features a brief summary of the WSDL standards by James Kao.

The article covers the JavaTM technology API for WSDL (JWSDL) specification that is currently in the works in the Java Community ProcessSM (JCP). Kao discusses how a web service is registered, found and called in a scenario based on Java technology. The web service is registered in a UDDI repository using the Java API for XML Registries (JAXR), where a business partner or other system can find the service. The registry information from UDDI is used to locate a WSDL document that details the call semantics for the Web service. With the WSDL document in hand, the Java technology programmer can then feed it to a tool that can generate a Java technology object proxy to the Web service, or simply use it as a reference document along with a lower-level Simple Object Access Protocol API.

Illustrations and a sample WSDL definition with code are included on the original web site.

http://dcb.sun.com/practices/webservices/overviews/overview_wsdl.jsp [...read more...]

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