KI 2007: Advances in Artificial Intelligence 30th Annual German

The 30th Annual German Conference on Arti?cial Intelligence (KI-2007) took place in the University of Osnabru ¨ck, September 10–13, 2007. In this volume, you will ?nd papers or abstracts of its six invited talks, 25 full papers, and 21 posters. The full p

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Subseries of Lecture Notes in Computer Science

4667

Joachim Hertzberg Michael Beetz Roman Englert (Eds.)

KI 2007: Advances in Artificial Intelligence 30th Annual German Conference on AI, KI 2007 Osnabrück, Germany, September 10-13, 2007 Proceedings

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Series Editors Jaime G. Carbonell, Carnegie Mellon University, Pittsburgh, PA, USA Jörg Siekmann, University of Saarland, Saarbrücken, Germany Volume Editors Joachim Hertzberg University of Osnabrück Institute of Computer Science 49069 Osnabrück, Germany E-mail: [email protected] Michael Beetz Technische Universität München Computer Science Department Boltzmannstr. 3, 85748 Garching München, Germany E-mail: [email protected] Roman Englert Deutsche Telekom Laboratories Ernst-Reuter-Platz 7, 10587 Berlin, Germany E-mail: [email protected]

Library of Congress Control Number: 2007934041

CR Subject Classification (1998): I.2, I.2.6, F.1.1, I.5.1 LNCS Sublibrary: SL 7 – Artificial Intelligence ISSN ISBN-10 ISBN-13

0302-9743 3-540-74564-5 Springer Berlin Heidelberg New York 978-3-540-74564-8 Springer Berlin Heidelberg New York

This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. Springer is a part of Springer Science+Business Media springer.com © Springer-Verlag Berlin Heidelberg 2007 Printed in Germany Typesetting: Camera-ready by author, data conversion by Scientific Publishing Services, Chennai, India Printed on acid-free paper SPIN: 12115082 06/3180 543210

Preface

The 30th Annual German Conference on Artificial Intelligence (KI-2007) took place in the University of Osnabr¨ uck, September 10–13, 2007. In this volume, you will find papers or abstracts of its six invited talks, 25 full papers, and 21 posters. The full papers were selected from 81 submissions, resulting in an acceptance rate of 32%. As usual at a KI conference, an entire day was reserved for targeted workshops – ten of them this year – and two tutorials. They are not covered in this volume, but the conference Web site www.ki2007.uos.de will keep providing information and references to their contents. Some topic clusters are apparent in the overall conference program, which reflect recent trends in AI research, convolved with foci of work in Germany and Europe. Examples are learning and data mining, robotics and perception, knowledge representation and reasoning, planning and search – all of them including a healthy number of approaches dealing with uncertainty, contradiction, and incompleteness of knowledge. All in all, KI-2007 provided a cross section