Acronym is used in context.
PermanentFact = False
HiddenFact = False
InternalUniquenessConstraint23
InternalUniquenessConstraint
It is possible that some acronym is used in more than one context
and that for some context, more than one acronym is used in that context.
In each population of acronym is used in context, each acronym, context combination occurs at most once.
This association with acronym, context provides the preferred identification scheme for acronym is used in context.