摘要：The semantic Web is gaining significance day by day. One of the main aims of Semantic Web is to make the web work like database. Ontology plays a significant role in Semantic Web and acts as a foundation stone in a building. With the fame of ontologies, we require an effective and immediate approach to change all ontology constructs into relational database automatically so that it could be queried effectively. The mapping of ontology information into relational database facilitates, multiple operations such as information seeking and recovery. A large volume of research work has been carried out on automatic conversion of RDF/OWL notions into database. However there exist issues in automatic conversion and mapping of ontology to relational database. In this review paper, we furnish state of the art and methodologies to automatically transform ontology to relational database. We also describe their drawbacks and benefits. We finally present the future research work for lossless and automatic mapping of ontology into relational database format.
