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KB:
SUMO
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OWL
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traditionalLogic
KB Term:
SingleValuedRelation
Sigma KEE  SingleValuedRelation
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单值关系
一个
Relation
是
SingleValuedRelation
以确保除了最后一个参数之外，每一个参数的位置只有一个赋值，而最后的参数 顶多可以决定最后一个参数的位置。注：不是所有的
SingleValuedRelation
都是
TotalValuedRelation
。
Relationships
Parents
可继承的关系
The class of
Relation
s whose properties can be inherited downward in the class hierarchy via the
subrelation
Predicate
.
关系
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
函数
A
Function
is a termforming
Relation
that maps from a ntuple of arguments to a range and that associates this ntuple with at most one range element. Note that the range is a
Class
, and each element of the range is an instance of the
Class
.
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