Université Pierre et Marie Curie, Paris 6 (UPMC, France): is one of the largest universities teaching science and medicine in France, and indeed in Europe, with some 30 000 students including 8 000 in post-graduate studies. UPMC is based in the Latin Quarter in Paris. The participants are member of the DAPA -department (Data Bases and Machine Learning) of the Laboratory of Computer Science of UMPC. This laboratory was created in January 1997 after the merger of the three Computer Science laboratories of the UPMC. With 450 professionals under its wing, it is today one of the most important centre of Computer Science in France. It is associated to the CNRS (National Centre for the Scientific Research). The list of the main participants is composed of part of the teaching and research staff of the DAPA department: