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KB Term:
Sigma KEE - ReflexiveRelation
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ReflexiveRelation
Relation
?REL is reflexive iff (?REL ?INST ?INST) for all ?INST.
Relationships
Parents
BinaryRelation
BinaryRelation
s are relations that are true only of pairs of things.
BinaryRelation
s are represented as slots in frame systems.
Children
EquivalenceRelation
A
BinaryRelation
is an equivalence relation if it is a
ReflexiveRelation
, a
SymmetricRelation
, and a
TransitiveRelation
.
PartialOrderingRelation
A
BinaryRelation
is a partial ordering if it is a
ReflexiveRelation
, an
AntisymmetricRelation
, and a
TransitiveRelation
.
Instances
connected
(connected ?OBJ1 ?OBJ2) means that ?OBJ1
meetsSpatially
?OBJ2 or that ?OBJ1
overlapsSpatially
?OBJ2.
keyName
(
keyName
?S1 ?S2) means that ?S1 is the
subString
of ?S2 (i.e., the component name) typically used for alphabetical name indexing.
overlapsSpatially
(
overlapsSpatially
?OBJ1 ?OBJ2) means that the
Object
s ?OBJ1 and ?OBJ2 have some parts in common. This is a reflexive and symmetric (but not transitive) relation.
overlapsTemporally
(
overlapsTemporally
?INTERVAL1 ?INTERVAL2) means that the
TimeInterval
s ?INTERVAL1 and ?INTERVAL2 have a
TimeInterval
as a common part.
subGraph
The relation between two
Graph
s when one
Graph
is a part of the other. (
subGraph
?GRAPH1 ?GRAPH2) means that ?GRAPH1 is a part of ?GRAPH2.
subString
(
subString
?
SymbolicString
-1 ?
SymbolicString
-2) means that ?
SymbolicString
-1 is
part
of ?
SymbolicString
-2. ?
SymbolicString
-2 includes all the same
Character
s as ?
SymbolicString
-1 and in the same order, but ?
SymbolicString
-2 may include more
Character
s than ?
SymbolicString
-1. See also
inString
.
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Sigma version 3.0 is
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produced by
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