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

Anotations

Scope note:

Numbers or codes that uniquely identify a record or entity within a given area of a system. Such numbers are typically system-generated; the values may comprise sequential numbers or codes algorithmically constructed. A goal may be to ensure uniqueness across multiple systems, such as UUID or GUID.