Reference for “SVG Compositing Specification”

@TechReport{Grasso:09:SCS,
  author      = "Anthony Grasso",
  title       = "{SVG} Compositing Specification",
  month       = apr,
  note        = "http://www.w3.org/TR/2009/WD-SVGCompositing-20090430/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}