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      Querying and Updating Constraint Databases with Incomplete Information

      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.

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          Constraint logic programming: a survey

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            Constraint logic programming

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              Author and article information

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

              University of Wolverhampton

              Wolverhampton

              WV1 1SB
              Article
              10.14236/ewic/ADBIS1997.40
              © 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 (journal page): https://ewic.bcs.org/
              Categories
              Electronic Workshops in Computing

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