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Sigma KEE - connected
(connected ?OBJ1 ?OBJ2) means that ?OBJ1
?OBJ2 or that ?OBJ1
This is the most general connection relation between
s. If (
?COMP1 ?COMP2), then neither ?COMP1 nor ?COMP2 can be an
of the other. The relation
, there is no information in the direction of connection between two components. It is also an
bears this relation to itself. Note that this relation does not associate a name or type with the connection.
?OBJ1 ?OBJ2) means that the
s ?OBJ1 and ?OBJ2 have some parts in common. This is a reflexive and symmetric (but not transitive) relation.
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.
relating two items - its valence is two.
s are relations that are true only of pairs of things.
s are represented as slots in frame systems.
The universal class of individuals. This is the root node of the ontology.
The class of
s whose properties can be inherited downward in the class hierarchy via the
is a sentence-forming
. Each tuple in the
is a finite, ordered sequence of objects. The fact that a particular tuple is an element of a
is denoted by '(*predicate* arg_1 arg_2 .. arg_n)', where the arg_i are the objects so related. In the case of
s, the fact can be read as `arg_1 is *predicate* arg_2' or `a *predicate* of arg_1 is arg_2'.
?REL is reflexive iff (?REL ?INST ?INST) for all ?INST.
of relations. There are two kinds of
s both denote sets of ordered n-tuples. The difference between these two
es is that
s cover formula-forming operators, while
s cover term-forming operators.
s that are spatial in a wide sense. This
includes mereological relations and topological relations.
?REL is symmetric just iff (?REL ?INST1 ?INST2) imples (?REL ?INST2 ?INST1), for all ?INST1 and ?INST2.
Belongs to Class
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