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)
9. flashing (building components)

Anotations

Scope note:

Watertight membranes, along roofs or other flat surfaces, that turn up against and cover the intersection with vertical surfaces, such as chimneys or parapets; the exposed upper edge is normally covered by counterflashing.