Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. furnishings components
7. furniture components
8. [furniture backs and back components]

Anotations

Scope note:

Refers to the parts of seating furniture that support sitters' backs. For the rearmost surfaces or portions of objects in general, use "backs (portions)." For supports that are used to rest one's back, either separate pieces of furniture or attachments to backless seating, use "backrests."