The Semantic Web - ISWC 2009 : 8th International Semantic Web Conference, ISWC 2009, Chantilly, VA, USA, October 25-29, 2009, Proceedings - Abraham Bernstein, David R. Karger, Tom Heath, Lee Feigenbaum, Diana Maynard, Enrico Motta, Krishnaprasad Thirunarayan ((Lecture Notes in Computer Science))