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KI is the main German national conference in AI, but it addresses an international audience by adopting English as the conference language and having the proceedings published in the Springer Lecture Notes in AI series (Jarke, Koehler, and Lakemeyer 2002). Of the 58 submissions from 17 countries, 20 were selected for presentation by the program committee, chaired by Jana Koehler, IBM Zurich, and Gerhard Lakemeyer, RWTH Aachen. Matthias Jarke, RWTH Aachen, was the general chair. The papers covered a broad range of areas, including multiagent systems, machine learning, natural language processing, constraint reasoning, knowledge representation, planning, and temporal reasoning. The paper by Franz Baader and Anni-Yasmin Turhan, TU Dresden, "On the Problem of Computing Small Representations of Least Common Subsumers," received the best paper award, sponsored by Springer-Verlag.