Abstract: The graphical set is designed based on the items of OWL Lite, which is a language designed for describing ontologies, to represent the ontologies in graphic structure and then the Graphic Ontology Modeling Tool (GOM) is designed and implemented. In the Graphic Ontology Modeling Tool, ontologies are represented by the graphic structure. The GOM can transform the ontologies represented by graphic constructions into ontologies represented by OWL Lite; besides, the GOM can also read OWL Lite files, and then transform the ontologies represented by OWL Lite into the ontologies represented by graphic structure. The GOM implements the transformation between the ontologies represented by OWL Lite and ontologies represented by the graphic constructions, improves the readability of the ontologies, and reduces the difficuties of the ontology modeling job.

Key words: ontology modeling, ontologies represented by graphic constructions, edit the graphs, switch the representations