> For the complete documentation index, see [llms.txt](https://docs.atfinity.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.atfinity.io/guides/glossary/role.md).

# Role

### Definition

A role describes the relationship between two [ontologies](/guides/glossary/ontology.md). A single [instance](/guides/glossary/instance.md) of an ontology can have multiple roles. Examples of roles are: 'account holder', 'signatory', 'power of attorney', and 'beneficial owner'.

### Example:

Peter Müller, an instance of the ontology ‘Person’, can take the role of ‘Account Holder’ in Contract #1234. At the same time, Müller can take the role of ‘Beneficiary Owner’ in Contract #5678 and the role of ‘Power of Attorney’ in Contract #9101.


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