# distribution normal form obsolete definition

## distribution normal form - obsolete-definition

An inferred view of a concept definition from which redundant subtype relationships have been removed.

#### Notes

* The *distribution normal form* allows non-redundant subtype relationships to readily display a hierarchical view of the terminology.
* The *distribution normal form* was distributed in the SNOMED CT relationship file until July 2018.

## Alternatives

* **DNF**

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