This book constitutes the thoroughly refereed proceedings of the 31st Annual German Conference on Artificial Intelligence, KI 2008, held in Kaiserslautern, Germany, September 2008.
The 15 revised full papers presented together with 2 invited contributions and 30 posters were carefully reviewed and selected from 77 submissions. The papers cover important areas such as pattern recognition, multi-agent systems, machine learning, natural language processing, constraint reasoning, knowledge representation and management, planning, and temporal reasoning.