Reference for “XQuery 1.1: An XML Query Language”

@TechReport{Chamberlin:09:XAX,
  author      = "Don Chamberlin and John Snelson and Jonathan Robie and Michael Dyck",
  title       = "{XQuery} 1.1: An {XML} Query Language",
  month       = dec,
  note        = "http://www.w3.org/TR/2009/WD-xquery-11-20091215/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}