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. information form components
7. gathered matter components
8. [bindings and binding components]
9. binding components
10. boards (binding components)

Anotations

Scope note:

Bookbinding boards with the back or binding edge either split open to a shallow depth or, in the case of laminated boards, left unadhered. The boards are attached to the text block by the tapes or flanges being inserted into and adhered within the split edge.