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. architectural elements
7. [structural elements and components for structural elements]
8. structural elements
9. enclosing structural elements
10. [roofs and roof components]
11. roof components
12. exterior roof components
13. roof appendages

Anotations

Scope note:

Railed, unroofed platforms surmounting the roofs of American houses offering a view, especially of the sea; for rooftop outlooks that are enclosed, use "belvederes"; for rooftop structures that are usually ornamental, use "cupolas."