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KB Term:
Sigma KEE - MonthFn
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MonthFn
A
BinaryFunction
that maps a subclass of
Month
and a subclass of
Year
to the class containing the
Month
corresponding to that
Year
. For example (
MonthFn
August
(
YearFn
1912)) is the class containing the eighth
Month
, i.e. August, of the
Year
1912. For another example, (
MonthFn
August
Year
) is equal to
August
, the class of all months of August. Note that this function returns a
Class
as a value. The reason for this is that the related functions, viz. DayFn, HourFn, MinuteFn, and SecondFn, are used to generate both specific
TimeInterval
s and recurrent intervals, and the only way to do this is to make the domains and ranges of these functions classes rather than individuals.
Relationships
Instances
Abstrato
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.
Funcao Binaria
The
Class
of
Function
s that require two arguments.
Entidade
The universal class of individuals. This is the root node of the ontology.
Funcao
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
.
InheritableRelation
The class of
Relation
s whose properties can be inherited downward in the class hierarchy via the
subrelation
Predicate
.
Relacao Parcial
A
Relation
is a
PartialValuedRelation
just in case it is not a
TotalValuedRelation
, i.e. just in case assigning values to every argument position except the last one does not necessarily mean that there is a value assignment for the last argument position. Note that, if a
Relation
is both a
PartialValuedRelation
and a
SingleValuedRelation
, then it is a partial function.
Relacao
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.
Relacao com Valor Unico
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.
Relacao Temporal
The
Class
of temporal
Relation
s. This
Class
includes notions of (temporal) topology of intervals, (temporal) schemata, and (temporal) extension.
Relacao Ternaria
TernaryRelation
s relate three items. The two
subclass
es of
TernaryRelation
are
TernaryPredicate
and
BinaryFunction
.
Belongs to Class
Entidade
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