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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 > Vehicles > Railroad trains > Train components > Railroad cars > Maintenance of way cars

Qbfmk: Railroad cars
Qbfmkk: Maintenance of way cars
 Qbfmkkt: Inspection cars

Find documents having Maintenance of way cars

Broader Term:
Qbfmk: Railroad cars
 
Related Terms:
Qbfmkc: Cabooses
Qbfmkf: Freight cars
Qbfmkh: Passenger cars
Qbfmkj: Rail motorcars
Qbfmkm: Multiple unit cars
Qbfmkt: Railroad cars by type
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