(Web Services Choreography) Co-ordination of web services, as defined by the W3C. The WorldWide Web Consortium (W3C) set up the WS-Choreography Working Group in January 2003 to develop a standard for 'describing linkages and usage patterns between web services'. It regards choreography as equivalent to concepts such as orchestration, collaboration, co-ordination and so on. However its work overlaps with that of many existing initiatives, and in particular by the submission of the joint IBM/Microsoft/BEA specification BPEL4WS to e-business standards body OASIS.