Reference for “Requirements for WCAG 2.0”

@TechReport{Slatin:06:RW,
  author      = "John Slatin and Wendy Chisholm and Gregg Vanderheiden",
  title       = "Requirements for {WCAG} 2.0",
  month       = apr,
  note        = "http://www.w3.org/TR/2006/NOTE-wcag2-req-20060425/",
  year        = "2006",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Note",
  institution = "W3C",
}