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. charts (graphic documents)

Anotations

Scope note:

In general scientific use, charts that consist of several lines marked off to scale and arranged in such a way that by using a ruler to connect known values on two lines with a straight line, an unknown value can be read at the point of intersection with another line. Used specifically in the notation of Minimal music to establish new relationships between notes.