Data modelling and ontological semantics

The paper deals with semantic data model and its application in data integration. It analyses the issue of mapping database schemes (particularly relational models) for common data models expressed in the form of ontology. Substantial part is dedicated to methods of acquiring ontology from relational databases, where rules for creating classes, properties, hierarchies, cardinalities and instances are specified. Simple examples are used to demonstrate the application, i.e., the mapping of individual concepts of a relational data model into ontology concepts. The article is concluded by a graph showing fragment of ontology through examples using Altova SemanticWorks software.