The Semantic Web: Research and Applications : 7th Extended Semantic Web Conference, ESWC 2010, Heraklion, Crete, Greece, May 30 - June 2, 2010, Proceedings, Part I - Lora Aroyo, Grigoris Antoniou, Eero Hyvönen, Annette Teije, Heiner Stuckenschmidt, Liliana Cabral, Tania Tudorache ((Lecture Notes in Computer Science))