Reference for “Web Services Choreography Requirements”

@TechReport{Austin:04:WSC,
  author      = "Daniel Austin and Ed Peters and Abbie Barbir and Steve Ross-Talbot",
  title       = "Web Services Choreography Requirements",
  month       = mar,
  note        = "http://www.w3.org/TR/2004/WD-ws-chor-reqs-20040311/",
  year        = "2004",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}