Sean Bechhofer Manfred Hauswirth Jörg Hoffmann Manolis Koubarakis The Semantic Web: Research and Applications, 5th European Semantic Web Conference, ESWC 2008, Tenerife, Canary Islands, Spain, June 1-5, 2008, Proceedings 5021 2008 978-3-540-68233-2 ESWC Lecture Notes in Computer Science Springer db/conf/esws/eswc2008.html