| ISA | EVENT-RELATION |
| SUBCLASSES | DIAGNOSED-WITH HAS-RISK-FACTOR HAS-SYMPTOM TREATED-WITH |
| DESCENDANTS | DIAGNOSED-WITH HAS-RISK-FACTOR HAS-SYMPTOM TREATED-WITH |
| ANCESTORS | ALL EVENT-RELATION PROPERTY RELATION |
| RELATIONS | DOMAIN : DISEASE-EVENT |
| INHERITED RELATIONS | RANGE : OBJECT (from RELATION) EVENT (from RELATION) |