This book constitutes the refereed proceedings of the 10th European Conference on Logics in Artificial Intelligence, JELIA 2006. The 34 revised full papers and 12 revised tool description papers presented together with 3 invited talks were carefully reviewed and selected from 96 submissions. The papers cover a range of topics within the remit of the Conference, such as logic programming, description logics, non-monotonic reasoning, agent theories, automated reasoning, and machine learning.

The seventh German Conference on Multi-Agent System Technologies (MATES 2009) took place in Hamburg, Germany, during September 9-11, 2009, and was colocated with the tenth International Workshop on Computational Logic in Multi-Agent Systems (CLIMA X) and the Fifth International Workshop on Modelling of Objects, Components, and Agents (MOCA 2009). MATES 2009 wasorganizedby the German"Gesellschaft fur Informatik" (GI) Special Interest Groups on "Distributed Arti?cial Intelligence" and "Communication and D- tributed Systems" in cooperation with the Steering Committee of MATES. One main aim of...