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A Model for Multigranular Data and Its Integrity
Umeå University, Faculty of Science and Technology, Department of Computing Science.
2017 (English)In: Informatica (Vilnius), ISSN 0868-4952, E-ISSN 1822-8844, Vol. 28, no 1, 45-78 p.Article in journal (Refereed) Published
Abstract [en]

Data involving spatial and/or temporal attributes are often represented at different levels of granularity in different source schemata. In this work, a model of such multigranular data is developed, which supports not only the usual order structure on granules, but also lattice-like join and disjointness operators for relating such granules in much more complex ways. In addition, a model for multigranular thematic attributes, to which aggregation operators are applied, is provided. Finally, the notion of a thematic multigranular comparison dependency, generalizing ordinary functional and order dependencies but specifically designed to model the kinds of functional and order dependencies which arise in the multigranular context, and in particular incorporating aggregation into the definition of the constraint, is developed.

Place, publisher, year, edition, pages
INST MATHEMATICS & INFORMATICS , 2017. Vol. 28, no 1, 45-78 p.
Keyword [en]
relational, database, multigranular, integrity
National Category
Computer Science
Identifiers
URN: urn:nbn:se:umu:diva-134833DOI: 10.15388/Informatica.2017.120ISI: 000398983000003OAI: oai:DiVA.org:umu-134833DiVA: diva2:1098078
Available from: 2017-05-23 Created: 2017-05-23 Last updated: 2017-05-23Bibliographically approved

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Hegner, Stephen J.
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CiteExportLink to record
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