I am a Professor of Informatics at Oxford University and a Fellow of St John's College.
I moved to Oxford from TU Vienna, Austria, in 2006, where I used to work since 1988 as a Professor of Computer Science. More precisely, I held the Chair of Computing Science from 2006 to 2011, and I am holding the Chair of Informatics since January 2012. I currently still hold an Adjunct Professor position in Vienna, and you may look at my Vienna home page for additional information.
I have been helping to build up the Information Systems Group at the Department of Computer Science at Oxford University. My current research deals with algorithms and complexity of problems in the following areas: Graph and hypergraph theory, databases, query languages, semistructured data and XML processing, games and auctions, graph or hypergraph based problem decomposition, knowledge representation and reasoning, AI, logic programming, finite model theory, computational logic. I am also interested in both theoretical and practical aspects of web data extraction. I am a founding member of the Oxford-Man Institute of Quantitative Finance.
I currently teach reading courses for graduate students. I used to teach Theory of Data and Knowledge Bases
Contact details can be found on my personnel page.