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KB Term: 

  friend

Sigma KEE - friend
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
friend
(holdsDuring ?T1 (friend ?H1 ?H2)) means that during time ?T1, ?H1 and ?H2 know each other, share a relationship of mutual care and concern, and probably also share some common interests.
Relationships      
Parents mutualAcquaintance (mutualAcquaintance ?H1 ?H2) means that ?H1 and ?H2 have met each other and know something about each other, such as name and appearance. Statements made with this predicate should be temporally specified with holdsDuring. See also the weaker, non-symmetric version of this predicate, acquaintance.
InstancesAbstractProperties or qualities as distinguished from any particular embodiment of the properties/qualities in a physical medium. Instances of Abstract can be said to exist in the same sense as mathematical objects such as sets and relations, but they cannot exist at a particular place and time without some physical encoding or embodiment.
 BinaryPredicateA Predicate relating two items - its valence is two.
 BinaryRelationBinaryRelations are relations that are true only of pairs of things. BinaryRelations are represented as slots in frame systems.
 EntityLa clase universal de individuos. Es el nodo principal de la ontologĂ­a.
 InheritableRelationThe class of Relations whose properties can be inherited downward in the class hierarchy via the subrelation Predicate.
 IntentionalRelationThe Class of Relations between an AutonomousAgent and one or more Entities, where the Relation requires that the AutonomousAgent have awareness of the Entity.
 PredicateA Predicate is a sentence-forming Relation. Each tuple in the Relation is a finite, ordered sequence of objects. The fact that a particular tuple is an element of a Predicate is denoted by '(*predicate* arg_1 arg_2 .. arg_n)', where the arg_i are the objects so related. In the case of BinaryPredicates, the fact can be read as `arg_1 is *predicate* arg_2' or `a *predicate* of arg_1 is arg_2'.
 RelationThe 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.
 SymmetricRelationA BinaryRelation ?REL is symmetric just iff (?REL ?INST1 ?INST2) imples (?REL ?INST2 ?INST1), for all ?INST1 and ?INST2.
Belongs to Class Entity


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