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. plans (orthographic projections)
12. building plans

Anotations

Scope note:

Plans that are viewed from above, but laid out as if they were projected downward onto the back of an upper surface, such as a ceiling. In such a plan all members seen on the left from below appear on the right in the plan. The term also refers to plans for ceilings depicted as if reflected in a mirror on the floor, within the context of the floor plan, with the goal of illustrating how the ceiling design or configuration relates to the floor plan.