Reference for “Widgets 1.0: Requirements”

@TechReport{Priestley:09:WR,
  author      = "Mark Priestley and Marcos Caceres",
  title       = "Widgets 1.0: Requirements",
  month       = apr,
  note        = "http://www.w3.org/TR/2009/WD-widgets-reqs-20090430/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}