Complete Geometric Query Languages
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Marc Gyssens; Jan Van den Bussche; Dirk Van Gucht
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Article
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1999
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Elsevier Science
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English
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We extend Chandra and Harel's seminal work on computable queries for relational databases to a setting in which also spatial data may be present, using a constraint-based data model. Concretely, we introduce both coordinate-based and point-based query languages that are complete in the sense that th