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Sigma KEE  TernaryRelation
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ternary relation
TernaryRelation
s relate three items. The two
subclass
es of
TernaryRelation
are
TernaryPredicate
and
BinaryFunction
.
Relationships
Parents
inheritable relation
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.
Children
binary function
The
Class
of
Function
s that require two arguments.
ternary predicate
The
Class
of
Predicate
s that require exactly three arguments.
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