| Definition: A pointer to an external object, such as an entry in a database or a term in a controlled vocabulary. Comment: This class is for organizational purposes only; direct instances of this class should not be created. |
| •owl:Thing |
| •utilityClass |
| •externalReferenceUtilityClass |
Class(externalReferenceUtilityClass partial utilityClass)
DisjointClasses(externalReferenceUtilityClass pathwayStep
chemicalStructure
evidence
physicalEntityParticipant
sequenceLocation
confidence)