The W3C Web Services Choreography Working Group has posted the third public working draft of Web Services Choreography Requirements 1.0. According to the abstract, "As the momentum around Web Services grows, the need for effective mechanisms to co-ordinate the interactions among Web Services and their users becomes more pressing. The Web Services Choreography Working Group has been tasked with the development of such a mechanism in an interoperable way. This document describes a set of requirements for Web Services choreography based around a set of representative use cases, as well as general requirements for interaction among Web Services. This document is intended to be consistent with other efforts within the W3C Web Services Activity."