Information Sharing on the Semantic Web

The large-scale and almost ubiquitous availability of information has become as much of a curse as it is a blessing. The more information is available, the harder it is to locate any particular piece of it. And even when it has been successfully found, it

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Heiner Stuckenschmidt · Frank van Harmelen

Information Sharing on the Semantic Web With 51 Figures and 13 Tables

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Heiner Stuckenschmidt Vrije Universiteit Amsterdam de Boelelaan 1081a 1081HV Amsterdam e-mail: [email protected]

Frank van Harmelen Vrije Universiteit Amsterdam de Boelelaan 1081a 1081HV Amsterdam e-mail: [email protected]

Library of Congress Control Number: 2004112293

ACM Subject Classification (1998): H.3.3, H.2.5, I.2.4, D.2.12

ISBN 3-540-20594-2 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, reuse of illustrations, recitation, broadcasting, reproduction on microfilm 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 for prosecution under the German Copyright Law. Springer is a part of Springer Science+Business Media springeronline.com © Springer-Verlag Berlin Heidelberg 2005 Printed in Germany The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: KünkelLopka, Heidelberg Production: LE-TeX Jelonek, Schmidt & Vöckler GbR, Leipzig Typesetting: by the Authors Printed on acid-free paper 45/3142/YL - 5 4 3 2 1 0

To absent friends.

Preface

About the book The success of the information society The rapid progress of the “information society” in the past decade has been made possible by the removal of many technical barriers. Producing, storing, and transporting information in large quantities are no longer significant problems. Producing on-line, digitized information is no longer a problem. Ever more of our commercial, scientific and personal information exchanges happen on-line in digital form. In the professional domain, near 100% of all office documents are produced in digital form (even if afterwards they are distributed in paper form), large parts of the scientific discourse are now taking place in digital form (with physics, computer science and astronomy taking a leading role). In the public domain, newspapers are available on-line, an increasing number of radio and television stations offer their material on-line in streaming form and e-government is an important theme for public administration. Even in the personal area, information is rapidly moving on-line: sales of digital cameras are now higher then for analogue cameras, e-mail and on-line chat have become important channels for maintaining social relations and for personal entertainment the digital DVD is rapidly replacing the analogue video tape. Compact disk (itself already digital) is under serious pressure