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. [openings and opening components]
8. openings (architectural elements)
9. [openings by form]
10. [doorways and doorway components]
11. doorway components
12. [doors and door components]
13. doors
14. [doors by mode of operation]

Anotations

Scope note:

Doors that are attached, usually on one side or the top, by metal hinges, allowing the door to pivot open. The hinges typically allow the door to open away from the doorway in one direction but not in the other on a vertical or horizontal axis of rotation.