> For the complete documentation index, see [llms.txt](https://docs.snomed.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.snomed.org/snomed-international-documents/snomed-ct-glossary/r/role.md).

# role

## role

**This is a synonym for concept model attribute.**

## concept model attribute

A characteristic of the meaning of a concept or the nature of a refinement.

#### Notes

* An *attribute* is assigned a value (attribute value pair) when used in the definition of a concept or in a postcoordinated expression.
* The *attributes* that can be used in *definitions* or *refinements* are represented by a concepts that are subtypes of the concept [410662002 | Concept model attribute (attribute)|](http://snomed.info/id/410662002) .
* The SNOMED CT concept model specifies:
  * The concept model domains which each specific *attribute* can be applied; and
  * The concept model range of values that can be applied to each specific *attribute*.

#### Example

* The attribute [116676008 | Associated morphology|](http://snomed.info/id/116676008)
  * is one of the *attributes* that can be applied to concepts in the [404684003 | Clinical finding|](http://snomed.info/id/404684003) domain; and
  * its range includes [49755003 | Morphologically abnormal structure (morphologic abnormality)|](http://snomed.info/id/49755003) and its subtypes.

## Alternatives

* **Attribute**
* **Role**

##

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