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Entity > Abstract > Class > Relation > BinaryRelation > UnaryFunction > SkinFn
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SkinFn comparison table
Subject have domain1 be first domain of have range be second domain of documentation have axiom is a kind of is an instance of
SpatialRelation valence subrelationThe Class of Relations that are spatial in a wide sense. This Class includes mereological relations, topological relations, and positional relations
(=>
(and
(instance ?REL SpatialRelation)
(holds ?REL ?OBJ1 ?OBJ2))
(overlapsTemporally (WhenFn ?OBJ1) (WhenFn ?OBJ2)))
Relation 
UnaryFunction rangeSubclass inverseThe Class of Functions that require a single argument
(=>
(instance ?FUNCTION UnaryFunction)
(valence ?FUNCTION 1))
Function 
SkinFnHolerangeSubclassObjectinverseA UnaryFunction that maps a Hole to the skin of the Hole. The skin of a Hole is the fusion of those superficial parts (see superficialPart) of the Hole's principal host (see PrincipalHostFn) with which the Hole is externally connected
(=>
(equal ?OBJ1 (SkinFn ?HOLE))
(forall (?OBJ2)
(<=>
(overlapsSpatially ?OBJ2 ?OBJ1)
(exists (?OBJ3)
(and
(superficialPart ?OBJ3 (PrincipalHostFn ?HOLE))
(meetsSpatially ?HOLE ?OBJ3)
(overlapsSpatially ?OBJ2 ?OBJ3))))))
 UnaryFunction

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