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Relationships
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birthday | (birthday ?PERSON ?DAY) means that ?DAY is the anniversary each year of the birth of ?PERSON. For example, (birthday WilliamJeffersonClinton (DayFn 19 August)) means that Bill Clinton's birthday is August 19th. |
| | weddingAnniversary | (weddingAnniversary ?PHYSICAL ?TIME) means that ?TIME is the class of TimeIntervals which mark the anniversary of their weddingdate. |
| Instances | abstract | Properties 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. |
| | binary predicate | A Predicate relating two items - its valence is two. |
| | binary relation | BinaryRelations are relations that are true only of pairs of things. BinaryRelations are represented as slots in frame systems. |
| | entity | The universal class of individuals. This is the root node of the ontology. |
| | inheritable relation | The class of Relations whose properties can be inherited downward in the class hierarchy via the subrelation Predicate. |
| | predicate | A 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'. |
| | relation | 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. |
| | temporal relation | The Class of temporal Relations. This Class includes notions of (temporal) topology of intervals, (temporal) schemata, and (temporal) extension. |
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