Reference for “OWL 2 Web Ontology Language:Model-Theoretic Semantics”

@TechReport{Grau:08:OWO,
  author      = "Bernardo Cuenca Grau and Boris Motik",
  title       = "{OWL} 2 Web Ontology Language:Model-Theoretic Semantics",
  month       = apr,
  note        = "http://www.w3.org/TR/2008/WD-owl2-semantics-20080411/",
  year        = "2008",
  bibsource   = "http://webcapita.com/w3c-bibliography/2008/WD-owl2-semantics-20080411/",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}