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:

Optical, machine readable codes, usually representing numbers, rendered as black and white bars of varying width that carry information; used for entering data or making data legible to a computer system. Bar codes are often used to identify, for pricing, organizing, or distinguish information about one thing, person, or other entity from others.