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W3C Publishes First Public Working Draft of WSDL 1.2
W3C Publishes First Public Working Draft of WSDL 1.2

(July 15, 2002) - The World Wide Web Consortium (W3C) has issued Web Services Description Language (WSDL) 1.2 and WSDL 1.2 Bindings as W3C Public Working Drafts.

The W3C reports that WSDL 1.2 provides several improvements over WSDL 1., including language clarifications, making it easier for developers to understand and use. WSDL 1.2 provides support for W3C Recommendations, including XML Schemas and XML Information Set. It adopts a conceptual framework approach to define the description components, making them simpler and more flexible. WSDL 1.2 also removes unnecessary and non-interoperable features from WSDL 1.1. Finally, WSDL 1.2 provides a better definition for the HTTP 1.1 binding and will soon provide a binding for SOAP 1.2 , which allows description of services using the most current version of SOAP.

The W3C Web Services Description Working Group, as one of over thirty W3C Working Groups, must ensure that their work results in a specification that interoperates cleanly with existing W3C work, including that of both the XML and Semantic Web Activities. For the XML Activity, the Web Services Description Working Group continues to track the evolution of the XML Family of specifications. For the Semantic Web Activity, the Working Group cooperates with the Resource Description Framework (RDF) Interest Group to produce a mapping of WSDL 1.2 to RDF, the language providing interoperability between applications that exchange machine-understandable information - the foundation for the Semantic Web.

W3C has been developing an architecture for Web services which takes into account the needs of users as well as technology vendors, pursuing the development of open standardized components, as it has done for HTML, the XML family of technologies, Scalable Vector Graphics, and Voice-Web technologies. " 'Web services' begin with the Web," remarked W3C Web Services Activity Lead, Hugo Haas. "W3C's success depends on the commitment to Web architectural principles of extensibility, openness, and interoperability. "

WSDL 1.2 is an XML-based language that describes a Web Service - the data exchanged, the protocol to use, and its location on the Web. WSDL 1.2 Bindings describes how to use WSDL1.2 with SOAP 1.2, HTTP, and MIME. These are the first in the series of WSDL 1.2 drafts. More progress is also expected on Usage Scenarios and Requirements. W3C invites the Web development community to review and comment on these and subsequent versions. For more information see www.w3.org/.

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