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 form]
8. graphic document genres
9. diagrams

Anotations

Scope note:

Diagrams consisting of adjacent graphs that represent variables and quantities for statistics and data representation. In digital photography, histograms represent the tabulation of the number of exposed pixels for each gray level of a digital color image.