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SUMO
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Formal Language:
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traditionalLogic
KB Term:
Sigma KEE - SellersOtherItemsFn
A
B
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D
E
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sellers other items
(SellersOtherItemsFn ?AGENT ?SITE ?LISTING ?TIMEPOINT) returns a
Collection
of all
WebListing
s except ?LISTING
hostedOn
?SITE where ?AGENT is the
listingSeller
and where ?TIMEPOINT is a Temporal part of
WhenFn
of those
WebListing
s.
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
.
quaternary function
The
Class
of
Function
s that require exactly four arguments.
quintary relation
QuintaryRelation
s relate five items. The two
subclass
es of
QuintaryRelation
are
QuintaryPredicate
and
QuaternaryFunction
.
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.
Belongs to Class
entity
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Sigma version 3.0 is
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