Reference for “XQuery 1.1 Requirements”

@TechReport{Robie:09:XR,
  author      = "Jonathan Robie and Daniel Engovatov",
  title       = "{XQuery} 1.1 Requirements",
  month       = dec,
  note        = "http://www.w3.org/TR/2009/WD-xquery-11-requirements-20091215/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}