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Entity > Abstract > Class > Relation > BinaryRelation > AntisymmetricRelation > AsymmetricRelation > CardinalityFn

CardinalityFn
subject			fact

CardinalityFn	documentation (CardinalityFn ?CLASS) returns the number of instances in the Class or Collection ?CLASS
	has axiom (=> (and (instance ?COUNT Counting) (agent ?COUNT ?AGENT) (patient ?COUNT ?ENTITY)) (exists (?NUMBER) (knows ?AGENT (equal (CardinalityFn ?ENTITY)))))
	has axiom (=> (instance ?SET FiniteSet) (exists (?NUMBER) (and (instance ?NUMBER NonnegativeInteger) (equal ?NUMBER (CardinalityFn ?SET)))))
	has domain1 (UnionFn Class Collection)
	has domain2 NonnegativeInteger
	is an instance of AsymmetricRelation
	is an instance of UnaryFunction
BinaryRelation	is first domain of DomainFn
	is first domain of equivalenceRelationOn
	is first domain of inverse
	is first domain of irreflexiveOn
	is first domain of partialOrderingOn
	is first domain of RangeFn
	is first domain of reflexiveOn
	is first domain of totalOrderingOn
	is first domain of trichotomizingOn
	is second domain of inverse
Function	is first domain of AssignmentFn
	is first domain of closedOn
	is first domain of range
	is first domain of rangeSubclass
Class	is third domain of domain
	is third domain of domainSubclass
Abstract	is disjoint from Physical

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