Abstract
The Internet is spreading into our society rapidly and deeply and is becoming one of our social infrastructures. Especially, WWW technologies are widely used for doing business and research, creating communities, disseminating personal information, and so on. We usually access WWW pages one by one through a browser, but we can add more value to them by integrating information collected from various WWW sites. However, to realize such WWW information integration, we face obstacles such as distributed information sources, access cost, and frequently and asynchronous updates of information. We here adopt mediator, which integrates information from distributed information sources, with cache mechanism to reduce access cost. We also propose a dynamic access planning method to cope with frequently updating information sources. In a limited time period, it can construct an appropriate answer by accessing information sources effectively considering reliability and quality of cached data. We show its performance through a real-world flight information service comparing with a conventional access strategy.
This work is partly supported by NTT Communication Science Laboratories.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Adali, S., Candan, K.S., Papakonstantinou, Y., Subrahmanian, V.S.: Query Caching and Optimization in Distributed Mediator Systems. In: SIGMOD 1996, pp. 137–148 (1996)
Chawathe, S., Garcia-Molina, H., Hammer, J., Ireland, K., Papakonstantinou, Y., Ullman, J., Widom, J.: The TSIMMIS Project: Integration of Heterogeneous Information Sources. In: Proceedings of IPSJ Conference, pp. 7–18 (1994)
Finin, T., babrou, Y., Mayfield, J.: KQML as an Agent Communication ban-guage. In: Bradshow, J.M. (ed.) Software Agents, pp. 291–316. AAAI Press, Menlo Park (1997)
Florescu, D., Levy, A., Mendelzon, A.: Database Techniques for the World-Wide Web: A Survey. SIGMOD Record 27(3) (1998)
Friedman, M., Levy, A., Millstein, T.: Navigational Plans for Data Integration. In: AAAI 1999, pp.67-73 (1999)
Genesereth, M.: An Agent-Based Framework for Interoperability. In: Bradshaw, J.M. (ed.) Software Agents, pp. 315–345. AAAI Press, Menlo Park (1997)
Hearst, M.: Information Integration. IEEE Intelligent Systems 13(5), 12–24 (1998)
Hsu, J.Y., Yih, W.: Template-based Information Mining from HTML Documents. In: AAAI 1997, pp. 256–262 (1997)
Kitamura, Y., Noda, T., Tatsumi, S.: Single-agent and Multi-agent Approaches to WWW Information Integration. In: Ishida, T. (ed.) PRIMA 1998. LNCS (LNAI), vol. 1599, pp. 133–147. Springer, Heidelberg (1999)
Klusch, M. (ed.): Intelligent Information Agents. Springer, Heidelberg (1999)
Knoblock, C.A., Minton, S., Ambite, J.L., Ashish, N., Modi, P.J., Muslea, I., Philpot, A.G., Tejada, S.: Modeling Web Sources for Information Integration. In: AAAI 1998, pp. 211–218 (1998)
Kuokka, D., Harada, L.: Integrating Information via Matchmaking. Journal of Intelligent Information Systems 6, 261–279 (1996)
Kwok, C.T., Weld, D.S.: Planning to Gather Information. In: AAAI 1996, pp. 32–39 (1996)
Russell, S.J., Norvig, P.: Artificial Intelligence: A Modern Approach, p. 844. Prentice-Hall, Inc., Englewood Cliffs (1995)
Wiederhold, G.: Mediators in the Architecture of Future Information Systems. IEEE Computer 25(3), 38–49 (1992)
Wiederhold, G. (ed.): Intelligent Integration of Information. Kluwer Academic Publishers, Dordrecht (1996)
Wiederhold, G., Genesereth, M.: The Conceptual Basis for Mediation Services. IEEE Expert 12(5), 38–47 (1997)
Zhuge, Y., Garcia-Molina, H., Hammer, J., Widom, J.: View Maintenance in a Warehousing Environment. In: SIGMOD 1995 (1995)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2000 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Kitamura, Y., Noda, T., Tatsumi, S. (2000). A Dynamic Access Planning Method for Information Mediator. In: Klusch, M., Kerschberg, L. (eds) Cooperative Information Agents IV - The Future of Information Agents in Cyberspace. CIA 2000. Lecture Notes in Computer Science(), vol 1860. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45012-2_5
Download citation
DOI: https://doi.org/10.1007/978-3-540-45012-2_5
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-67703-1
Online ISBN: 978-3-540-45012-2
eBook Packages: Springer Book Archive