Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Transportation Vehicles (hierarchy name)
5. vehicles (transportation)
6. land vehicles
7. [land vehicles by form]
8. guideway vehicles
9. rail guideway vehicles
10. locomotives
11. [locomotives by method of propulsion]

Anotations

Scope note:

Locomotives powered by onboard internally fired boilers through which hot exhaust gases flow from a firebox in the rear to a smokebox and stack at the front and in which high-pressure steam expands within cylinders to drive two pistons; often having coal or water tenders coupled behind.