A Exemplar

1. Something fit to be imitated; an ideal, a model. Synonyms: model
2. A role model.
3. Something typical or representative of a class; an example.
4. A pattern after which others should be made; an archetype.
5. A well known usage of a scientific theory.
6. A handwritten manuscript used by a scribe to make a handwritten copy; the original copy of what gets multiply reproduced in a copy machine.
7. A copy of a book or piece of writing