TITLE: Community-based Mediation SPEAKER: Yannis Papakonstantinou ABSTRACT: Mediators allow their client applications and users to obtain information from multiple sources using a single point of access, which is an integrated view of the data of the sources. Enterprise-wide Information Integration (EII) systems already provide integrated views of a limited number of sources but require an ``integration administrator'' who manages the integration process. At the same time there is motivation for a next generation of mediation systems, which we call community-based, whereas hundreds of owners of independent sources will be able to register their source data to the integrated view and clients will be able to build portal applications that draw clean information from such sources. Enabling such community-based systems requires technical advances. We focus on visual interactive tools that guide the source owner towards figuring out whether it is worthy to clean up an attribute X and, if yes, how it should be mapped to the integrated view. Other visual tools will assist the client in formulating executable and meaningful queries over the integrated view. We present such tools and the algorithms required by their back-ends. Joint work with UCSD's Alin Deutsch, Yannis Katsis and Mihalis Petropoulos. SHORT BIO: Yannis Papakonstantinou is an Associate Professor of Computer Science and Engineering at the University of California, San Diego. His research is in the intersection of database and Internet technologies. Yannis has published over fifty research articles in scientific conferences and journals, given tutorials at major conferences, and served on journal editorial boards and program committees for numerous international conferences and symposiums. He was the co-Chair of WebDB 2002, the General Chair of ACM SIGMOD 2003, the Vice PC Chair for the ``XML, Metadata and Semistructured Data" track of IEEE ICDE 2004, and the founding co-Chair of the XQuery Implementation Experience and Perspectives (XIME-P) 2004. In 1998, Yannis received the NSF CAREER award for his work on integrating heterogeneous data. In 2000 Yannis co-founded with Dr. Vasilis Vassalos Enosys Software, which built the first generally available distributed XQuery processor, along with software for XML-based integration of distributed sources, and was sold in 2003 to BEA Systems. Yannis holds a Diploma of Electrical Engineering from the National Technical University of Athens and MS and Ph.D. in Computer Science from Stanford University (1997).