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Entity > Abstract > Class > Relation > BinaryRelation > ReflexiveRelation > EquivalenceRelation > equivalentContentClass

equivalentContentClass
subject			fact

equivalentContentClass	documentation A BinaryPredicate that relates two subclasses of ContentBearingObject. (equivalentContentClass ?CLASS1 ?CLASS2) means that the content expressed by each instance of ?CLASS1 is also expressed by each instance of ?CLASS2, and vice versa. An example would be the relationship between English and Russian editions of Agatha Christie's 'Murder on the Orient Express'. Note that (equivalentContentClass ?CLASS1 ?CLASS2) implies (subsumesContentClass ?CLASS1 ?CLASS2) and (subsumesContentClass ?CLASS2 ?CLASS1)
	has axiom (<=> (and (subsumesContentClass ?CLASS1 ?CLASS2) (subsumesContentClass ?CLASS2 ?CLASS1)) (equivalentContentClass ?CLASS1 ?CLASS2))
	has domain1 ContentBearingObject
	has domain2 ContentBearingObject
	is an instance of EquivalenceRelation
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
Class	is third domain of domain
	is third domain of domainSubclass
Abstract	is disjoint from Physical

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