Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Information Forms (hierarchy name)
5. information forms (objects)
6. document genres
7. [documents by function]
8. reference sources
9. controlled vocabularies

Anotations

Scope note:

A controlled list is a simple list of terms used to control terminology. In a well-constructed controlled list, the following should be true: each term must be unique; terms should all be members of same class; terms should not be overlapping in meaning; terms should be equal in granularity/specificity; and terms should be arranged alphabetically or in another logical order.