Advances in Databases and Information Systems 12th East European Con

This book constitutes the refereed proceedings of the 12th East European Conference on Advances in Databases and Information Systems, ADBIS 2008, held in Pori, Finland, on September 5-9, 2008. The 22 revised papers were carefully reviewed and selected fro

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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 Alfred Kobsa University of California, Irvine, CA, 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 Gerhard Weikum Max-Planck Institute of Computer Science, Saarbruecken, Germany

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Paolo Atzeni Albertas Caplinskas Hannu Jaakkola (Eds.)

Advances in Databases and Information Systems 12th East European Conference, ADBIS 2008 Pori, Finland, September 5-9, 2008 Proceedings

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Volume Editors Paolo Atzeni Università Roma Tre, Informatica e Automazione Via Vasca Navale 79, 00146 Roma, Italy E-mail: [email protected] Albertas Caplinskas Institute of Mathematics and Informatics Akademijos str. 4, 08663, Vilnius, Lithuania E-mail: [email protected] Hannu Jaakkola Tampere University of Technology, Pori P.O.Box 300, 28101 Pori, Finland E-mail: hannu.jaakkola@tut.fi

Library of Congress Control Number: 2008933208 CR Subject Classification (1998): H.2, H.3, H.5.3, J.1 LNCS Sublibrary: SL 3 – Information Systems and Application, incl. Internet/Web and HCI ISSN ISBN-10 ISBN-13

0302-9743 3-540-85712-5 Springer Berlin Heidelberg New York 978-3-540-85712-9 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 2008 Printed in Germany Typesetting: Camera-ready by author, data conversion by Scientific Publishing Services, Chennai, India Printed on acid-free paper SPIN: 12456345 06/3180 543210

Preface

This volume contains the best papers presented at the 12th East-European Conference on Advances in Databases and Information Systems (ADBIS 2008) held during September 5–9, 2008, in Pori, Finland. The series of ADBIS conferences is the successor of the annual international workshops with the same title that during 1993-1996 were organized in Russia by the Moscow ACM SIGMOD Chapter. ADBIS 2008 continues the series of A