The Semanic Web: Research and Applications 8th Extended Semantic Web Conference, ESWC 2011, Heraklion, Crete, Greece, May 29 – June 2, 2011, Proceedings, Part II - Antoniou, Grigoris; Grobelnik, Marko; Simperl, Elena; Parsia, Bijan; Plexousakis, Dimitris; Leenheer, Pieter De; Pan, Jeff (Springer Berlin Heidelberg : Imprint: Springer, 2011)