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Sigma KEE  QuaternaryRelation
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quaternary relation
QuaternaryRelation
s relate four items. The two
subclass
es of
QuaternaryRelation
are
QuaternaryPredicate
and
TernaryFunction
.
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
quaternary predicate
The
Class
of
Predicate
s that require four arguments.
ternary function
The
Class
of
Function
s that require exactly three arguments.
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