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. layout features

Anotations

Scope note:

Refers to the space allowed for each line of type on typewriters, typesetters, printers, or other devices not involving metal type. For the extra spacing between lines of metal type, use "leading (spacing)."