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KB:
SUMO
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Formal Language:
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SUO-KIF
TPTP
traditionalLogic
KB Term:
Predicate
Sigma KEE - Predicate
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谓语
Predicate
是一个作句的
Relation
，这个
Relation
的每一个元组都是物体有限、有序的的句子。一个特定组员是一个
Predicate
的元素这事实，由 '(*predicate* arg_1 arg_2 .. arg_n)'来表示， arg_i 是关联的事物。在
BinaryPredicate
的情况下， 可以读成 `arg_1 是 *predicate* arg_2' 或者 `arg_1 的一个 *predicate* 是 arg_2'。
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 n-tuples. The difference between these two
Class
es is that
Predicate
s cover formula-forming operators, while
Function
s cover term-forming operators.
Children
二元谓语
A
Predicate
relating two items - its valence is two.
逻辑运算符
This
Class
comprises all of the logical operators (viz. 'and', 'or', 'not', '=>', and '<=>').
四元谓语
The
Class
of
Predicate
s that require four arguments.
五元谓语
The
Class
of
Predicate
s that require five arguments.
三元谓语
The
Class
of
Predicate
s that require exactly three arguments.
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Sigma version 3.0 is
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