Abstract
The Closed-World Assumption (CWA) on a database expresses that an atom not in the database is false. The CWA is only applicable in domains where the database has complete knowledge. In many cases, for example in the context of distributed databases, a data source has only complete knowledge about part of the domain of discourse. In this paper, we introduce an expressive and intuitively appealing method of representing a local closed-world assumption (LCWA) of autonomous data-sources. This approach distinguishes between the data that is conveyed by a data-source and the meta-knowledge about the area in which these data is complete. The data is stored in a relational database that can be queried in the standard way, whereas the meta-knowledge about its completeness is expressed by a first order theory that can be processed by an independent reasoning system (for example a mediator). We consider different ways of representing our approach, relate it to other methods of representing local closed-word assumptions of data-sources, and show some useful properties of our framework which facilitate its application in real-life systems.
This work is supported by FWO-Vlaanderen, European Framework 5 Project WASP, and by GOA/2003/08.
This is a preview of subscription content, log in via an institution to check access.
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
Calvanese, D., De Giacomo, G., Lenzerini, M.: Description logics for information integration. In: Kakas, A.C., Sadri, F. (eds.) Computational Logic: Logic Programming and Beyond. LNCS (LNAI), vol. 2408, pp. 41–60. Springer, Heidelberg (2002)
Doherty, P., Łukaszewicz, W., Szalas, A.: Efficient reasoning using the local closed-world assumption. In: Cerri, S.A., Dochev, D. (eds.) AIMSA 2000. LNCS (LNAI), vol. 1904, pp. 49–58. Springer, Heidelberg (2000)
Duschka, O., Genesereth, M., Levy, A.: Recursive query plans for data integration. J. Logic Programming 43(1), 49–73 (2000)
Etzioni, O., Golden, K., Weld, D.: Sound and efficient closed-world reasoning for planning. Artificial Intelligence 89(1-2), 113–148 (1997)
Grahne, G.: Information integration and incomplete information. IEEE Data Engineering Bulletin 25(3), 46–52 (2002)
Grahne, G., Mendelzon, A.: Tableau techniques for querying information sources through global schemas. In: Beeri, C., Bruneman, P. (eds.) ICDT 1999. LNCS, vol. 1540, pp. 332–347. Springer, Heidelberg (1998)
Halpern, J., Moses, Y.: Knowledge and common knowledge in a distributed environment. Journal of the ACM 37(3), 549–587 (1990)
Lenzerini, M.: Data integration: A theoretical perspective. In: Proc. 21st PODS, pp. 233–246 (2002)
Rousset, M., Reynaud, C.: Knowledge representation for information integration. Inf. Syst. 29(1), 3–22 (2004)
McCarthy, J.: Applications of circumscription to formalizing common sense knowledge. In: Lifschitz, V. (ed.) Formalizing Common Sense: Papers by John McCarthy, pp. 198–225. Ablex Publishing Corporation, New Jersey (1990)
Millstein, T., Levy, A., Friedman, M.: Query containment for data integration systems. In: Proc. 21st PODS, pp. 67–75 (2002)
Naumann, F., Freytag, J.C., Leser, U.: Completeness of integrated information sources. Information Systems 29(7), 583–615 (2004)
Reiter, R.: Towards a logical reconstruction of relational database theory. In: On Conceptual Modelling, Perspectives from Artificial Intelligence, Databases, and Programming Languages, pp. 191–233 (1982)
Van Nuffelen, B., Cortés-Calabuig, A., Denecker, M., Arieli, O., Bruynooghe, M.: Data integration using ID-logic. In: Persson, A., Stirna, J. (eds.) CAiSE 2004. LNCS, vol. 3084, pp. 67–81. Springer, Heidelberg (2004)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Cortés-Calabuig, A., Denecker, M., Arieli, O., Van Nuffelen, B., Bruynooghe, M. (2005). On the Local Closed-World Assumption of Data-Sources. In: Baral, C., Greco, G., Leone, N., Terracina, G. (eds) Logic Programming and Nonmonotonic Reasoning. LPNMR 2005. Lecture Notes in Computer Science(), vol 3662. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11546207_12
Download citation
DOI: https://doi.org/10.1007/11546207_12
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-28538-0
Online ISBN: 978-3-540-31827-9
eBook Packages: Computer ScienceComputer Science (R0)