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. [surface elements and surface element components]
8. surface elements (architectural)

Anotations

Scope note:

The network of small, repeated cellular forms resembling bottomless niches and sometimes corbeled and structural, more often suspended and decorative, which form the undersurfaces of vaults and domes common in Islamic architecture.