Third, service metadata can describe the capabilities and To expand on the metadata for a Web service. WSDL has extensibility points that can be used Language for describing the ‘how’ and ‘where’ a Web serviceĮxchanges messages. The Web Services Description Language is currently the most common The message exchange pattern and the list of available endpoints. Message format, what headers are used, the transmission protocol, Second, service metadata can describe the ‘how’ and ‘where’ a To represent SOAP Body children and SOAP Header blocks. Message interchange format within the SOAP message construct, i.e. The XML Schema language is frequently used to describe the To automatically generate and validate data sent to and from a Web Metadata can describe different parts of a Web service and thusĮnable different levels of tooling support.įirst, service metadata can describe the format of the payloads For example, tools that consume service metadata canĪutomatically generate client code to call the service. Web service, and consists of a mixture of machine- and Service metadata is an expression of the visible aspects of a The WS-Policy and WS-PolicyAttachment specificationsĮxtend this foundation and offer mechanisms to represent theĬapabilities and requirements of Web services as Policies. Technologies such as SOAP, XML Schema and WSDL provide aīroadly-adopted foundation on which to build interoperable Web Well-suited to enable service-oriented systems. Interest and investment in Web services is that they are Web services are being successfully used for interoperable Web Services Policy 1.5 - Guidelines for Policy Assertion Authors and Web Services Policy 1.5 - Primer. The W3C Web Services Activity has published new working drafts of
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