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

Anotations

Scope note:

Unique numeric identifiers used to create machine-readable codes for items, usually represented as barcodes. The identifiers were developed in the 1980s and originally called the "European Article Number"; the initials "EAN" were retained even though the term has been changed to "International Article Number."