Caetano Traina Junior received a B.Sc. degree in Electrical Engineering (1977) from the University of Sao Paulo, BRAZIL, M.Sc. degrees in Computer Science from University of Sao Paulo, BRAZIL (1982) and a Ph.D. degree in Computational Physics from the University of Sao Paulo, BRAZIL. He is currently a professor at Computer Science and Statistics Department, University of Sao Paulo at Sao Carlos, Brazil. His current research interests include object-oriented databases, DBMS system implementation, conceptual modeling, database models and languages. He was a visiting researcher at Carnegie Mellon University during 1998-1999.