Reference for “XPointer xmlns() Scheme”

@TechReport{Jr.:03:XS,
  author      = "Ron Daniel Jr. and Jonathan Marsh and Eve Maler and Steven J. DeRose",
  title       = "{XPointer} xmlns() Scheme",
  month       = mar,
  note        = "http://www.w3.org/TR/2003/REC-xptr-xmlns-20030325/",
  year        = "2003",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Recommendation",
  institution = "W3C",
}