Simple Knowledge base Browser - PartialValuedRelation

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Sigma KEE - PartialValuedRelation

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部分值关系

一个 Relation 是 PartialValuedRelation 是为了确保它不是一个 TotalValuedRelation，也就是说除了最后一个之外给每一个参数位置分配一个值，但这不一定等于已经为最后一个参数位置设定赋值。注：如果一个 Relation既是 PartialValuedRelation 又是 SingleValuedRelation的话，那么它就是一个部分函数。

Relationships
Parents	关系	The Class of relations. There are three kinds of Relation: Predicate, Function, and List. Predicates and Functions both denote sets of ordered n-tuples. The difference between these two Classes is that Predicates cover formula-forming operators, while Functions cover term-forming operators. A List, on the other hand, is a particular ordered n-tuple.