Tore Risch is Professor of Database Technology at Uppsala University (Sweden) where he leads the Uppsala DataBase Laboratory (UDBL) research group (http://www.it.uu.se/research/group/udbl/). He was previously Professor at Linköping University (Sweden). Before Linköping he was staff member in the Database Technology Department at Hewlett-Packard Laboratories (Palo Alto, California), and Visiting Scholar from HP in the database group at Stanford University. Prior to joining HP, he worked for Syntelligence Inc. (Sunnyvale, California) designing a product for large scale knowledge bases combining AI and database technologies. He also worked on the Prospector expert system (SRI, Menlo Park, California), on integrating Prolog with relational databases (Uppsala U., Sweden), and at IBM's Almaden Center (San Jose, California) on functional knowledge representation. He made his PhD 1978 at Linköping University (Sweden), on query optimization in a meta-database system. He is author of over 100 technical publications and 5 US patents. He was General Chair of three international scientific conferences and member of the program committees of over 100 international scientific conferences.