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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> Materials > Classes of materials > Building materials

Rb: Classes of materials
Rbm: Building materials
Click to expand Rbmd: Building materials by properties
Click to expand Rbmn: Materials by function
Click to expand Rbmu: Materials by end use
Click to expand Rbmv: Engineered materials
Click to expand Rbmy: Materials by source

Use For:
Construction materials
 
Cross Reference:
Qt: Equipment
 
Broader Term:
Rb: Classes of materials
 
Related Terms:
Rbb: States of matter
Rbc: Chemicals
Rbd: Water
Rbe: Natural earth crust materials
Rbf: Fuels
Rbj: Air
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