Reference for “XQuery and XPath Data Model 1.1”

@TechReport{Berglund:09:XXD,
  author      = "Anders Berglund and John Snelson and Norman Walsh",
  title       = "{XQuery} and {XPath} Data Model {1.1}",
  month       = dec,
  note        = "http://www.w3.org/TR/2009/WD-xpath-datamodel-11-20091215/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}