Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. [concepts in the arts and humanities]
5. [genres in literature and performing arts]
6. [genres for performing arts]
7. music (performing arts genre)

Anotations

Scope note:

Music, often improvisational, originally developed around the turn of the 20th century by African Americans from elements of blues and ragtime, with syncopated rhythms and a European harmonic structure. Jazz consistently evolved throughout the 20th century with numerous phases, from a New Orleans style or swing, to "free jazz," for example, which emerged in the late 1950s. Therefore, jazz itself has no precise definition, however it has rarely been a completely composed music.