Hierarchy classification:

1. top of the aat hierarchies
2. Agents Facet
3. Living Organisms (hierarchy name)
4. living organisms (entities)
5. Eukaryota (domain)
6. Animalia (kingdom)
7. Chordata (phylum)
8. Vertebrata (subphylum)
9. Mammalia (class)
10. Perissodactyla (order)
11. Equidae (family)
12. Equus (genus)
13. Equus caballus (species)

Anotations

Scope note:

Breed of horse characterized by being tall, slim, most notably used for racing and jumping. It was developed in England; the origin may be traced back to records indicating that a stock of Arab and Barb horses was introduced into England as early as the 3rd century.