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Probabilistic databases are databases where the value of some attributes or the presence of some records are uncertain and known only with some probability. Applications in many areas such as information extraction, RFID and scientific data management, data cleaning, data integration, and financial risk assessment produce large volumes of uncertain data, which are best modeled and processed by a probabilistic database.

Information systems --- 681.3*H24 --- 681.3*H28 --- 681.3*H28 Database applications --- Database applications --- 681.3*H24 Systems: concurrency; distributed systems; query processing; transaction processing (Database management) --- Systems: concurrency; distributed systems; query processing; transaction processing (Database management) --- Databases --- Probabilistic number theory --- Query languages (Computer science) --- Bases de données --- Nombres, Théorie probabiliste des --- Langages d'interrogation

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This volume collects the papers presented at the 11th International Conference onDatabaseTheory,ICDT2007,heldduringJanuary10-12,2007,inBarcelona, Spain. ICDT (http://alpha. luc. ac. be/?lucp1080/icdt/) now has a long tradition of international conferences, providing a biennial scienti?c forum for the com- nication of high-quality and innovative research results on theoretical aspects of all forms of data management systems and database technology. The conf- ence usually takes place in Europe, and previous conferences were held in Rome (1986),Bruges(1988),Paris(1990),Berlin(1992),Prague(1995),Delphi(1997), Jerusalem(1999),London(2001),Siena(2003)andEdinburgh(2005). ICDThas merged with the Symposium on Mathematical Fundamentals of Database S- tems (MFDBS), initiated in Dresden in 1987, and continued in Visegrad in 1989 and Rostock in 1991. This yearICDT received111papersubmissions (after 138titlesandabstracts were ?rst announced). Two of the papers were later withdrawn and one was rejected as it was 24 pages long (instead of 15). From the remaining 108 s- missions, the ICDT Program Committee selected 25 papers for presentation at the conference. Most of these papers were extended abstracts  and preliminary reports on work in progress. It is anticipated that most of these papers will - pear in a more polished form in scienti?c journals. The proceedings also contain three invited papers by Jan Chomicki, Cynthia Dwork, and Laura Haas. The Best Newcomer Award, for the best submission written solely by authors who had never published in earlier ICDT proceedings, was given by the Program Committee to Piotr Wieczorek for his paper Complexity of TypecheckingXML Views of Relational Databases.

Mathematical logic --- Computer science --- Information systems --- Artificial intelligence. Robotics. Simulation. Graphics --- Computer. Automation --- ICT (informatie- en communicatietechnieken) --- IR (information retrieval) --- informatica --- informatiesystemen --- database management --- wiskunde --- KI (kunstmatige intelligentie) --- logica --- robots