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WS-Choreography & WS-CDL
ŸWS-Choreography concerns the collaboration protocols of cooperating Web Service participants
–WS act as peers
–WS interact in long-lived, stateful & coordinated fashion
ŸA WS-Choreography description is a multi-participant contract that describes from a Global Viewpoint the common observable behavior of the collaborating WS participants
ŸWS-CDL is a language in which such a contract is specified
–Standardization underway in the W3C Choreography WG