Giovanni Semeraro Eugenio Di Sciascio Christian Morbidoni Heiko Stoermer Proceedings of the 4th Italian Semantic Web Workshop, Dipartimento di Informatica - Universita' degli Studi di Bari - Italy, 18-20 December, 2007 CEUR-WS.org 314 2008 SWAP CEUR Workshop Proceedings db/conf/swap/swap2007.html