Abstract
This is a study report of medical ontology development which is generated by porting from the MedDRA thesaurus into OWL. The generated ontology is named MedDRA ontology. As a result of this ontology making, we can easily browse meaning of the MedDRA ontology by using the ontology viewer of the semantic web engine which has been developed by the CyberEdge Corporation Ltd. Also, we can edit easily the ontology and can search semantically for various information of the MedDRA ontology.
