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SUMO
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Formal Language:
OWL
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traditionalLogic
KB Term:
Sigma KEE - LongitudeFn
A
B
C
D
E
F
G
H
I
J
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Longitude
(
LongitudeFn
?DIRECTION @ROW) denotes a meridian of longitude. Note that
LongitudeFn
is a
VariableArityRelation
. Examples: (
LongitudeFn
East
(
MeasureFn
180.0
AngularDegree
)), (
LongitudeFn
West
(
MeasureFn
122.0
AngularDegree
) (
MeasureFn
24.0
ArcMinute
)), (
LongitudeFn
East
(
MeasureFn
121.0
AngularDegree
) (
MeasureFn
0.0
ArcMinute
) (
MeasureFn
15.0
ArcSecond
)), (
LongitudeFn
West
(
MeasureFn
80.0
AngularDegree
) (
MeasureFn
6.78
ArcMinute
)).
Relationships
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.
entity
The universal class of individuals. This is the root node of the ontology.
function
A
Function
is a term-forming
Relation
that maps from a n-tuple of arguments to a range and that associates this n-tuple with at most one range element. Note that the range is a
Class
, and each element of the range is an instance of the
Class
.
inheritable relation
The class of
Relation
s whose properties can be inherited downward in the class hierarchy via the
subrelation
Predicate
.
relation
The
Class
of relations. There are two kinds of
Relation
:
Predicate
and
Function
.
Predicate
s and
Function
s both denote sets of ordered n-tuples. The difference between these two
Class
es is that
Predicate
s cover formula-forming operators, while
Function
s cover term-forming operators.
single valued relation
A
Relation
is a
SingleValuedRelation
just in case an assignment of values to every argument position except the last one determines at most one assignment for the last argument position. Note that not all
SingleValuedRelation
s are
TotalValuedRelation
s.
variable arity relation
The
Class
of
Relation
s that do not have a fixed number of arguments.
Belongs to Class
entity
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Sigma version 3.0 is
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