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. sketches
8. preliminary sketches (sketches)

Anotations

Scope note:

Fairly developed sketches, most often three-dimensional ones for sculpture, but may be painted or drawn. With regard to sketches for architecture, use "preliminary sketches." For rougher sculptural sketches, use "maquettes."