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unit of knowledge created by a unique combination of characteristics


This is a concrete item and can be implemented directly

Term: concept; 
Plural: concepts; 



Diagrammatic representation

Simple graph - concept

Required associations

one or more concepts is a unit of exactly one knowledge

Optional associations

a number of system of conceptss one or more concepts
a number of deprecated terms relates to one or more concepts
a number of terms designates one or more concepts
a number of synonyms designates exactly one concept