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. drawings (visual works)
8. [drawings by function]

Anotations

Scope note:

The broad class of drawings that are intended for constructional, mechanical, or mapping purposes and that follow precise conventions of scale and projection, including cross-sections, details, diagrams, elevations, perspectives, plans, etc., made for use in a technical context.