Stefano Spaccapietra Paolo Atzeni François Fages Mohand-Said Hacid Michael Kifer John Mylopoulos Barbara Pernici Pavel Shvaiko Juan Trujillo Ilya Zaihrayeu J. Data Semantics Lecture Notes in Computer Science 4601 Springer 2007 978-3-540-74982-0 db/journals/jods/jods9.html