Hierarchy classification:

1. top of the aat hierarchies
2. Physical Attributes Facet
3. Attributes and Properties (hierarchy name)
4. [attributes and properties by specific type]
5. form attributes
6. size/dimensions
7. [size/dimensions by specific type]
8. [size for book formats]

Anotations

Scope note:

Book format created when a sheet is folded to form 12 leaves or 24 pages. Typically made by inserting a smaller sheet into a larger sheet, as opposed to creating the size by creating two parallel folds and two right angle folds in one sheet.