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 assigned when an art object, book, or other item enters the collection of a museum, library, or other repository. Such codes are unique within the set of codes, and specifically identify the particular item at hand. The numbers may be marked on the objects or not.