A Geometrically Enhanced Conceptual Model and Query Language

Motivated by the authors' experiences with spatial modelling for the sustainable land use initiative they present a Geometrically enhanced ER Model (GERM), which preserves the key principles of entity-relationship modelling and at the same time introduces bulk constructors and geometric features. The model distinguishes between a syntactic level of types and an explicit internal level, in which types give rise to polyhedra that are defined by algebraic varieties. It further emphasises the stability of algebraic operations by means of a natural modelling algebra that extends the usual Boolean operations on point sets.

Provided by: Journal of Universal Computer Science Topic: Data Management Date Added: Nov 2010 Format: PDF

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