Relationships




Parents 
可继承的关系 
The class of Relations 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. Predicates and Functions both denote sets of ordered ntuples. The difference between these two Classes is that Predicates cover formulaforming operators, while Functions cover termforming operators.

Children 
反对称关系  BinaryRelation ?REL is an AntisymmetricRelation if for distinct ?INST1 and ?INST2, (?REL ?INST1 ?INST2) implies not (?REL ?INST2 ?INST1). In other words, for all ?INST1 and ?INST2, (?REL ?INST1 ?INST2) and (?REL ?INST2 ?INST1) imply that ?INST1 and ?INST2 are identical. Note that it is possible for an AntisymmetricRelation to be a ReflexiveRelation. 
 二元谓语  A Predicate relating two items  its valence is two. 
 经济关系  A class of Relations which are used to specify various economic measures, e.g. the GDP, the consumer price index, and the trade deficit. 
 非传递关系  A BinaryRelation ?REL is intransitive only if (?REL ?INST1 ?INST2) and (?REL ?INST2 ?INST3) imply not (?REL ?INST1 ?INST3), for all ?INST1, ?INST2, and ?INST3. 
 非自反关系  Relation ?REL is irreflexive iff (?REL ?INST ?INST) holds for no value of ?INST. 
 自反关系  Relation ?REL is reflexive iff (?REL ?INST ?INST) for all ?INST. 
 sheddingPart  A relation between an Organisim and one of its Part which is given off as part of the normal process of life. Unlike Birth, the paitent dies upon its Removing from the origin. 
 对称关系  A BinaryRelation ?REL is symmetric just iff (?REL ?INST1 ?INST2) imples (?REL ?INST2 ?INST1), for all ?INST1 and ?INST2. 
 传递关系  A BinaryRelation ?REL is transitive if (?REL ?INST1 ?INST2) and (?REL ?INST2 ?INST3) imply (?REL ?INST1 ?INST3), for all ?INST1, ?INST2, and ?INST3. 
 三分关系  A BinaryRelation ?REL is a TrichotomizingRelation just in case all ordered pairs consisting of distinct individuals are elements of ?REL. 
 一元函数  The Class of Functions that require a single argument. 