Hierarchical Multidimensional Modelling in the Concept-Oriented Data Model
Alexander Savinov · 2005
Abstract. In the paper the concept-oriented data model (COM) is described from the point of view of its hierarchical and multidimensional properties. The model consists of two levels: syntactic and semantic. Concepts are combina-tions of superconcepts while items are combinations of superitems. It is de-scribed how this model can be interpreted as a hierarchical coordinate system. Two operations of projection and de-projection are used in the mechanism of access path. Grouping and aggregation with roll up and drill down are imple-mented via multidimensional de-projection. The described approach can be ap-plied to very different problems for multidimensional modelling including data-base systems, online analytical processing, knowledge based systems, ontolo-gies, complex categorizations, knowledge sharing and semantics web. 1