Tuesday, July 03, 2007

WSDL 2.0 approved as an official W3C Recommendation

Original Link

WSDL 2.0 has finally been approved as an official World Wide Web Consortium (W3C) recommendation on June 27 2007. The Web Services Description Working Group
has been working on the standards for more than 6 years. The
recommendation was due on the 31st of December 2006 but has received an
extension to the 30th of June this year.

There has been much debate about whether WSDL 2.0 is the long
awaited and improved successor of WSDL 1.1 (the de facto standard up to
now) or of no relevance at all. Mark Little has written an extensive post on this matter here on InfoQ. The main changes from WSDL 1.1 to 2.0 are:

  • Changes in the naming of WSDL components, e.g. portType has been renamed to interface
  • Removal of message constructs
  • Support of additional Message Exchange Patterns
  • Support of other type systems than XML Schema
  • HTTP binding, which supports POX(Plain Old XML)/REST-style services


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