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Sigma KEE  SpatialRelation
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SpatialRelation
The
Class
of
Relation
s that are spatial in a wide sense. This
Class
includes mereological relations and topological relations.
Relationships
Parents
InheritableRelation
The class of
Relation
s whose properties can be inherited downward in the class hierarchy via the
subrelation
Predicate
.
Relation
The
Class
of relations. There are two kinds of
Relation
:
Predicate
and
Function
.
Predicate
s and
Function
s both denote sets of ordered ntuples. The difference between these two
Class
es is that
Predicate
s cover formulaforming operators, while
Function
s cover termforming operators.
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