Archetype Instance

Definition: A single instantiation of data conforming to a specific archetype. In the context of CIMI this data will typically be clinical.
Reference Definition: Individual metadata class instance of an archetype model, specifying the clinical concept and the value constraints that apply to one class of record component instances in an electronic health record extract (ISO 13606-2, 2008)

Question: is this term usefull te define in the context of CIMI?