Lora Aroyo Paolo Traverso Fabio Ciravegna Philipp Cimiano Tom Heath Eero Hyvönen Riichiro Mizoguchi Eyal Oren Marta Sabou Elena Paslaru Bontas Simperl The Semantic Web: Research and Applications, 6th European Semantic Web Conference, ESWC 2009, Heraklion, Crete, Greece, May 31-June 4, 2009, Proceedings 5554 2009 http://dx.doi.org/10.1007/978-3-642-02121-3 978-3-642-02120-6 ESWC Lecture Notes in Computer Science Springer db/conf/esws/eswc2009.html