Journal on Data Semantics VIII - Spaccapietra, Stefano; Atzeni, Paolo; Fages, François; Hacid, Mohand-Saïd; Kifer, Michael; Mylopoulos, John; Pernici, Barbara; Shvaiko, Pavel; Trujillo, Juan; Zaihrayeu, Ilya (Springer Berlin Heidelberg, 2007)