Reference for “XML Query (XQuery) Requirements”

@TechReport{Marchiori:07:XQR,
  author      = "Massimo Marchiori and Don Chamberlin and Peter Fankhauser and Jonathan Robie",
  title       = "{XML} Query ({XQuery}) Requirements",
  month       = mar,
  note        = "http://www.w3.org/TR/2007/NOTE-xquery-requirements-20070323",
  year        = "2007",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Note",
  institution = "W3C",
}