Reference for “GRDDL Primer”

@TechReport{Davis:07:GP,
  author      = "Ian Davis and Harry Halpin",
  title       = "{GRDDL} Primer",
  month       = jun,
  note        = "http://www.w3.org/TR/2007/NOTE-grddl-primer-20070628/",
  year        = "2007",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Note",
  institution = "W3C",
}