Geometrically Enhanced Conceptual Modelling

Ma, Hui; Schewe, Klaus‐Dieter; Thalheim, Bernhard

doi:10.1007/978-3-642-04840-1_18

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Cited by 8 publications

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“…Example 2.4. Let us look at a small fraction of a conceptual schema that arises in geometric modelling for a landcare application [8]. The structural schema would capture descriptions of rivers and ponds by a few attributes and relationships to contracts concerning the use of water from these sources and regulations for waste water let into them.…”

Section: Definition 22mentioning

confidence: 99%

Complete Conceptual Schema Algebras

Noack

Schewe

et al. 2013

Fundamenta Informaticae

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A schema algebra comprises operations on database schemata for a given data model. Such algebras are useful in database design as well as in schema integration. In this article we address the necessary theoretical underpinnings by introducing a novel notion of conceptual schema morphism that captures at the same time the conceptual schema and its semantics by means of the set of valid instances. This leads to a category of schemata that is finitely complete and co-complete. This is the basis for a notion of completeness of schema algebras, if it captures all universal constructions in the category of schemata. We exemplify this notion of completeness for a recently introduced particular schema algebra.

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Section: Definition 22mentioning

confidence: 99%