# attribute hierarchy

## attribute hierarchy

A hierarchy in which a set of concept model attributes are linked to a more general *attribute.*

#### Notes

* Attribute hierarchies are represented in release files:
  * as subtype relationships in the relationship file.
  * as OWL SubObjectPropertyOf() axioms in the OWL Expression Reference Set file.

#### Examples

* * * **Attribute hierarchy represented by three OWL expressions**\
      \[code] SubObjectPropertyOf(:733930001 :774081006)\
      SubObjectPropertyOf(:733931002 :774081006)\
      SubObjectPropertyOf(:733932009 :774081006)\
      \[/code]

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