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      Querying and Updating Constraint Databases with Incomplete Information

      proceedings-article
      Proceedings of the First East-European Symposium on Advances in Databases and Information Systems (ADBIS)
      Advances in Databases and Information Systems
      2-5 September 1997
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            Abstract

            It is the aim of the research described in this paper is to to extend the work to deductive databases by proposing a theory of indefinite deductive constraint databases (IDCDs). This model provides a useful and natural representation of partial and infinite information. As a result of basing our representation of incomplete information on constraints, we can easily extend our model in order to enable the representation of temporal and/or spatial data by defining the domain of variables over which constraints can be defined to either be the temporal or spatial domain or by using, for example, linear arithmetic constraints to represent these domains. We describe how the syntax of the deductive database model can be enhanced with global conditions on incompletely specified constants to naturally represent partial information and provide a full declarative, fixpoint and procedural semantics for the language defined. We discuss an as yet unexplored problem with respect to constraint databases - that of updating and maintaining a consistent set of data in the presense of global conditions on incomplete information.

            Content

            Author and article information

            Contributors
            Conference
            September 1997
            September 1997
            : 1-17
            Affiliations
            [0001]School of Computing and Information Systems

            University of Wolverhampton

            Wolverhampton

            WV1 1SB
            Article
            10.14236/ewic/ADBIS1997.40
            924c302b-810c-4a8e-9185-0b7848744104
            © Julie Wilks. Published by BCS Learning and Development Ltd. Proceedings of the First East-European Symposium on Advances in Databases and Information Systems, (ADBIS'97), St Petersburg

            This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

            Proceedings of the First East-European Symposium on Advances in Databases and Information Systems
            ADBIS
            1
            St Petersburg
            2-5 September 1997
            Electronic Workshops in Computing (eWiC)
            Advances in Databases and Information Systems
            Product
            Product Information: 1477-9358BCS Learning & Development
            Self URI (article page): https://www.scienceopen.com/hosted-document?doi=10.14236/ewic/ADBIS1997.40
            Self URI (journal page): https://ewic.bcs.org/
            Categories
            Electronic Workshops in Computing

            Applied computer science,Computer science,Security & Cryptology,Graphics & Multimedia design,General computer science,Human-computer-interaction

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