NCI Protégé Summary
Protégé is a free, open source ontology editor and knowledge-base framework. The Protégé-OWL plug-in extends Protégé to support the Web Ontology Language (OWL). Visit the Protégé page for more information.
NCI Protégé is a collection of Protégé plug-ins developed for the NCI-specific editing environment and used to edit the NCI Thesaurus.