... and chemicals, anatomy,organisms, and proteins. Among these categories, thousands of concepts are defined. Each concept'sdefinition contains descriptive information, such as synonyms and ... NCI, and the issues associated with convertinga description logic based nomenclature to a semantically rich OWL ontology. Ontology DevelopmentGiven the rapid pace of research findings and clinical ... the Thésaurus into an ontology is to represent the concepts and their connections in a machine processable way. In our ontology, each concept is given a formaldesignator and the relationships...