Database and Expert Systems Applications 18th International Conferen
The annual international conference on Database and Expert Systems Applications (DEXA) is now well established as a reference scientific event. The reader will find in this volume a collection of scientific papers that represent the state of the art of -
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Editorial Board David Hutchison Lancaster University, UK Takeo Kanade Carnegie Mellon University, Pittsburgh, PA, USA Josef Kittler University of Surrey, Guildford, UK Jon M. Kleinberg Cornell University, Ithaca, NY, USA Friedemann Mattern ETH Zurich, Switzerland John C. Mitchell Stanford University, CA, USA Moni Naor Weizmann Institute of Science, Rehovot, Israel Oscar Nierstrasz University of Bern, Switzerland C. Pandu Rangan Indian Institute of Technology, Madras, India Bernhard Steffen University of Dortmund, Germany Madhu Sudan Massachusetts Institute of Technology, MA, USA Demetri Terzopoulos University of California, Los Angeles, CA, USA Doug Tygar University of California, Berkeley, CA, USA Moshe Y. Vardi Rice University, Houston, TX, USA Gerhard Weikum Max-Planck Institute of Computer Science, Saarbruecken, Germany
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Roland Wagner Norman Revell Günther Pernul (Eds.)
Database and Expert Systems Applications 18th International Conference, DEXA 2007 Regensburg, Germany, September 3-7, 2007 Proceedings
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Volume Editors Roland Wagner University of Linz Institute of FAW Altenbergerstrasse 69 4040 Linz, Austria E-mail: [email protected] Norman Revell † Middlesex University United Kingdom Günther Pernul University of Regensburg Universitätsstrasse 31 D-93053 Regensburg, Germany E-mail: [email protected]
Library of Congress Control Number: 2007933508 CR Subject Classification (1998): H.2, H.4, H.3, H.5, I.2, J.1 LNCS Sublibrary: SL 3 – Information Systems and Application, incl. Internet/Web and HCI ISSN ISBN-10 ISBN-13
0302-9743 3-540-74467-3 Springer Berlin Heidelberg New York 978-3-540-74467-2 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: 12112913 06/3180 543210
We would like to dedicate this volume of DEXA proceedings to our dear friend
Norman Revell (14.5.47 – 7.2.07)
We miss you. The DEXA Society
Preface
The annual international conference on Database and Expert Systems Applications (DEXA) is now well established as a reference scientific event. The reader will find in this volume a collection of scientific papers that represent the state of the art of research in the domain of data, information and knowledge management, intelligent system