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      Time-Oriented Data Model

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      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

            A minimal extension of relational data model for logical modeling of the category of time in databases is offered. The time is considered as a totally ordered set. In the frame of suggested datamodel the homogeneous model of representation of time in relations is adopted. Allowing the homogeneity, the modeling of the temporal aspect of databases is achieved by means of two temporal attributes. The temporal attribute is considered as abstract data type. A formal definition of temporal relation which is based on abstraction of generalization is given. The semantics of operators update and delete is changed. A temporal algebra and calculus are developed. Also new aggregate functions are suggested considering the time aspect of the object behavior in the given enterprise. In order to give temporal integrity constrains closed formulas are used. The problems of partial support of evolution of the database schemes are considered.

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            Author and article information

            Conference
            September 1997
            September 1997
            : 1-12
            Affiliations
            [0001]Department of Computer Science, Yerevan State University

            Yerevan, Republic of Armenia
            Article
            10.14236/ewic/ADBIS1997.29
            f1bc8290-29a4-4290-9298-9de3268a2580
            © Manuk G. Manukyan. 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
            History
            Product

            1477-9358 BCS Learning & Development

            Self URI (article page): https://www.scienceopen.com/hosted-document?doi=10.14236/ewic/ADBIS1997.29
            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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