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. information artifacts
7. [information artifacts by function]
8. identifying artifacts
9. identification numbers and codes
10. identification numbers

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication
4. Information Forms
5. information forms
6. document genres
7. documents by function
8. identifying markings and symbols
9. marks
10. marks by function

Anotations

Scope note:

Numeric, alphanumeric, or other identifying codes of various types assigned to an art object, book, other item, or group of works by the repository that holds that item or group. Any item or group in a repository may have multiple types of repository numbers. For numbers specifically assigned at the time of accession by a repository, prefer "accession numbers."