Figure 2.

Conceptual schematic of the bleeding history application ontology and bleeding history domain ontology. The examples of epistaxis and two associated questions are depicted. By deriving its structure directly from the bleeding history questionnaire, the bleeding history application ontology captures exact question syntax. In contrast, the bleeding history domain ontology is an idealized conceptualization of bleeding events, divorced from the exact syntax of any particular question. The bleeding history application ontology is linked to the bleeding history domain ontology via shared Properties. These Properties, in combination with Classes from either ontology, defi ne Individuals, which is a technical term that should not be confused with a specifi c person.