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A specialization of a concept, sharing all the definitional attributes of that concept, but with at least one additional distinguishing feature


  • Subtypes are transitive, that is if A is a subtype of B and B is a subtype of C, then A is also a subtype of C.
  • The term subtype is synonymous with subtype descendant. However, it may be helpful to use the term subtype descendant to emphasize inclusion of all subtypes not just subtype children.
    • Note that the distinguishing features may or may not be represented in the concept definition.




Not to be confused with:

  • The term subtype is sometimes used incorrectly to refer only to concepts that are directly related to a parent concept via a single |is a| relationship. The correct term for a directly related subtype concept is subtype child.

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