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

Note that the distinguishing features may or may not be represented in the  of the subtype.

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Notes

• 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 . However, it may be helpful to use the term subtype descendant to emphasize inclusion of all subtypes not just .

Example

•  is a subtype of . 
•  and  are subtypes of  (and thus also subtypes of ). 

Disambiguation

Not to be confused with:

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

Related Links

• Subtype 
•