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Transportation Research Thesaurus

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Each term in the TRT is assigned a unique notational code that conveys its location within the hierarchy. The first letter of the notation represents the facet or top term. Using the notational code it is easy to determine the terms relation in the hierarchy. The term's parent (Ae) will have one less letter (from the right end) as the term (Aea). Siblings (Aeg, Aes) will have the same notational code as the term except the last letter will be different. Children (Aeac, Aeah) will have one letter appended to the end of the notational code of the term.

Hierarchical Display

Top Terms> Vehicles and equipment > Vehicle components > Steering systems

Qp: Vehicle components
Qpj: Steering systems
 Qpjf: Four wheel steering
 Qpjp: Power steering
Click to expand Qpjy: Steering components

Scope Note:
Systems and devices to control a vehicle or craft
 
Cross Reference:
Dcmvgych: Automatic steering control
 
Broader Term:
Qp: Vehicle components
 
Related Terms:
Qpb: Vehicle bodies
Qpe: Vehicle compartments
Qpg: Vehicle frames
Qph: Vehicle push devices
Qpi: Suspension systems
Qpk: Brakes
Qpm: Tires and wheels
Qpn: Fuel systems
Qpo: Power trains
Qpp: Vehicle power plants
Qpq: Occupant protection devices
Qpu: Vehicle electrical systems
Qpv: Vehicle electronics
Qpw: Emission control systems
Qpy: Vehicle accessories
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