Database Repairing and Consistent Query Answering

Leopoldo Bertossi has been Full Professor at the School of Computer Science, Carleton University (Ottawa, Canada) since 2001. He is Faculty Fellow of the IBM Center for Advanced Studies. He obtained a Ph.D. in Mathematics from the Pontifical Catholic University of Chile (PUC) in 1988. He has been the theme leader for “Adaptive Data Quality and Data Cleaning" of the “NSERC Strategic Network for Data Management for Business Intelligence" (BIN), an ongoing umbrella research project that involves more than 15 academic researchers across Canada plus several industrial partners. Until 2001 he was professor and departmental chair (1993–1995) at the Department of Computer Science, PUC, and was also the President of the Chilean Computer Science Society (SCCC) in 1996 and 1999–2000. He has been visiting professor at the computer science departments of the universities of Toronto (1989/90), Wisconsin-Milwaukee (1990/91), Marseille-Luminy (1997) and visiting re[1]searcher at the Technical University Berlin (1997/98), visiting researcher and professor at the Free University of Bolzano-Bozen (Italy). In 2006, he was a visiting researcher at the Technical University of Vienna as a Pauli Fellow of the “Wolfgang Pauli Institute (WPI) Vienna". Prof. Bertossi’s research interests include database theory, data integration, peer data management, semantic web, intelligent information systems, data quality for business intelligence, knowledge representation, logic programming, and computational logic.

• Introduction.- The Notions of Repair and Consistent Answer.- Tractable CQA and Query Rewriting.- Logically Specifying Repairs.- Decision Problems in CQA: Complexity and Algorithms.- Repairs and Data Cleaning.