| Categorized Class |
Concrete Entity Concrete Entity is a class whose instances are classifed by an Ordered Class: it is the power instance of Ordered Class. Examples: |
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| Name | Description |
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Ordered Class |
Ordered Class is the Meta-Class (subtype of Class of Entity and instance of Meta-Class) of all power-type based Class of Entitys that follow a strict ordering of metalevels. |
Particular Entity |
A Particular Entity is a Concrete Entity that is not itself a class (Class of Entity): it cannot have instances. The " Particular Entity" class is the powerinstance of First Order Class. Particular Entitys are the most common type of entities. The word "Individual" is sometimes used to designate particulars. In SysFEAT, the term Individual is reserved for particulars that have a spatio-temporal extent. Examples: . The set of numbers {1,2,3,4}. . The mathematical constant π (pi). . The English word "Tree" (as a specific string of characters in a specific language). . The Eiffel tower (31st March 1889 - ...). . Mount Vesuvius eruption (Aug. 24-25, A.D. 79). |