Fact type role

Definition:	role that specifically characterizes its instances by their involvement in an actuality that is an instance of a given fact type

Source:	SBVR	Meaning	Concepts

Concept type:	concept type

Necessity :	Each fact type role is in exactly one fact type.

Necessity :	No fact type role is an object type.

reference scheme	a placeholder that represents the fact type role

reference scheme	a variable that maps to the fact type role

reference scheme	a characteristic that has the fact type role

Note:

A fact type role is fundamentally understood as a point of involvement in actualities that correspond to a fact type. Its incorporated characteristics come from the fact type - what the fact type requires of instances of the role. It is possible that two fact type roles incorporate the same characteristics, such as when a binary fact type means the same thing when roles are reversed, as in ‘person is married to person’.Property "Note" (as page type) with input value "A fact type role is fundamentally understood as a point of involvement in actualities that correspond to a fact type. Its incorporated characteristics come from the fact type - what the fact type requires of instances of the role. It is possible that two fact type roles incorporate the same characteristics, such as when a binary fact type means the same thing when roles are reversed, as in ‘person is married to person’." contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.