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. [windows and window components]
11. windows
12. [windows by form]

Anotations

Scope note:

Double windows of Dutch origin; windows are divided in four sections, with the lower halves covered by shutters or doors and the upper halves glazed. A related design is seen in "kloosterkozijns," resembling one-half of the kruiskozijn.