He received his B.Sc. in Computer Science and Mathematics from the Hebrew University in Jerusalem in 1988, and his Ph.D. in Computer Science from Stanford University in 1993. From 1993 to 1997 he was a principal member of the technical staff at AT&T Research Laboratories. His current research interests are information integration, semistructured data, materialized views, web­site management systems, knowledge representation and connections between database systems and Artificial Intelligence.