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]

Narrower term/s

• buttery hatches

Anotations

Scope note:

Relatively small openings in a wall or floor. Examples include openings in horizontal positions on decks of a ship and openings in a half-door or wall in a kitchen, thorugh which articles may be passed.