Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Visual Works (hierarchy name)
5. visual works (works)
6. [visual works by material or technique]
7. prints (visual works)
8. [prints by function]
9. proofs (prints by function)

Anotations

Scope note:

Proofs numbered separately from the edition, but often made at the same time as the edition, for the use of the artist. They are typically signed and marked in a special way and are usually sold at inflated prices. Artists' proofs are often the first 10 to 20 prints of a run; although the number of artists' proofs occasionally approaches that of the main edition, this practice is considered unethical.