Mapping OWL to the Entity Relationship and Extended Entity Relationship models

This paper presents mapping rules to conceptually model an Entity Relationship (ER) diagram and Extended Entity Relationship (EER) diagram from OWL by identifying ER and EER constructs in OWL. OWL has been designed for the semantic web, but data in OWL format is not easy to manipulate or query. The conceptual view of OWL presented in this paper is necessary to understand OWL and OWL data, and will be used to eventually map OWL data to the relational model. Once in the relational model, OWL data can avail of mature relational database technology.