ONTOLOGY2RDB FOR STORING ONTOLOGY IN RELATIONAL DATABASE

摘要

With the large expansion of data volume found on the web the majority of it is stored in relational format which provide maturity, performance, robustness, reliability, and availability but they lack the expressiveness and process-ability of semantic data and ontologies. The semantic web has a significant impact in various domains, which has led to the need of finding a formula for communicating with relational databases. In this paper we present a tool that acts as a bridge between the relational database and semantic data in which we provide a fully automated and effective approach that converts between a populated ontology and a relational database without losing the ontological structure while preserving the knowledge relations between the entities. Finally, we tested this approach to convert a weather ontology into relational database, by converting its ontological constructs to their corresponding entities in relational format, then maps the converted ontology with pre-existed relational database so that it could be queried effectively, as a result we were able to get a relational database with knowledge incorporated relations that was quite descriptive of the stored knowledge.