Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. multidisciplinary concepts
5. [dates and dating systems]
6. dates (spans of time)

Anotations

Scope note:

Not being furnished, marked, or bearing a period of documented time of creation or existance. In cataloging, when recording dates for files and items, if the unit or object being described bears no date and an institution or individual does not wish to or it may be misleading to record an estimated date, use undated.