Proceedings of the KWEPSY2007 Knowledge Web PhD Symposium 2007 co-located with the 4th Annual European Semantic Web Conference [ESWC2007] June 6, 2007 Innsbruck, Austria Edited by Elena Simperl, University of Innsbruck, Austria Joerg Diederich, L3S Research Center, Hannover, Germany Guus Schreiber, Vrije Universiteit Amsterdam, Netherlands © 2007 for the individual papers by the papers' authors. Copying permitted for private and academic purposes. Re-publication of material on this page requires permission by the copyright owners.