Determining and storing at least one validated results set in a global ontology database for future use by an entity that subscribes to the global ontology database. If global ontology data is stored in a global ontology database, attempt to determine a mapping between first and second ontologies. If a mapping between the first and second ontologies can be determined from the global ontology data, the mapping is validated and the validated mapping is defined as a validated results set. If global ontology data is not stored in a global ontology database or a mapping between the first and second ontologies can not be determined from global ontology data stored in the global ontology database, the first and second ontologies are unified by determining a mapping between the first and second ontologies, the mapping is validated and the validated mapping is defined as a validated results set. The validated results set is stored in the global ontology database for future use by an entity that subscribes to the global ontology database.