Abstract

This paper presents an overview of a data model for complex objects called EXTREM (EXTended RElational Model). EXTREM is based on the semantic database model IFO [AbHEXTREM is compared with other semantic database models. The EXTREM object algebra and user interfaces are briefly summarized.KeywordsObject RepresentationEntity TypeIntegrity ConstraintSemantic ConceptRelational AlgebraThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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