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 form]
7. [visual works by form of image]
8. [images by method of representation]
9. [images by method of projection]
10. orthographic projections (images)
11. sections (orthographic projections)

Anotations

Scope note:

Orthographic drawings of the exterior of a structure or object with a small portion removed to show an interior detail. When a more substantial portion is removed, use "half sections" or "sectional elevations."