SSDL - The SOAP Service Description Language
By toddfast on Feb 28, 2005
One of the big gaps in building real-world Web services is that there is no common description of the semantics of a service and its operations. WSDL tells a service consumer how to invoke a service, but not why or in what order. In other words, WSDL gives syntax, not semantics. As a result, this information must be transmitted out-of-band to service consumers, where it is likely to be misplaced, misinterpreted, or ignored. Just this month, the SSDL spec was released by folks over at ssdl.org with the goal of filling at least some of these gaps.