necessary condition

necessary condition

A characteristic that is always true of a concept.

Notes

• Some necessary conditions can be represented as defining relationships but other necessary conditions that can be represented as OWL axioms cannot be represented as relationships.

• The relationship file represents the inferred view of necessary conditions in that can be represented as relationships.

Example

• If you have a , the morphological abnormality must be present. Therefore, = is a necessary condition of .

• Prior to July 2018, SNOMED CT represented all necessary conditions in the stated view as defining relationships in the stated relationship file.

• Changes introduced in the July 2018 release of the International Edition mean that in future necessary conditions __ in the stated view will be represented as axioms in the OWL axiom reference set file.