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. document genres
7. [documents by function]
8. [identifying markings and symbols]
9. marks (identifying markings)
10. [marks by location or context]
11. watermarks

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 location or context
11. watermarks
12. three-plane watermarks

Anotations

Scope note:

Refers to detailed watermarks produced by a relief sculpture on the paper mold. The technique was supposedly invented in 1848 by the Englishman William Henry Smith. The light and shade watermark created more detail than the wire watermark. It is often used in paper money to make counterfeiting more difficult.