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Sigma KEE - SpatialRelation

空间关系

这是一个广义的空间 Relation Class，这个 Class 包括分体论关系和拓扑关系。

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 n-tuples. The difference between these two Classes is that Predicates cover formula-forming operators, while Functions cover term-forming operators.