Reference for “SKOS Use Cases and Requirements”

@TechReport{Phipps:09:SUC,
  author      = "Jon Phipps and Daniel Rubin and Antoine Isaac",
  title       = "{SKOS} Use Cases and Requirements",
  month       = aug,
  note        = "http://www.w3.org/TR/2009/NOTE-skos-ucr-20090818/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Note",
  institution = "W3C",
}