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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> Facilities > Transportation, hydraulic and utility facilities > Hydraulic structures > Dams

Pmh: Hydraulic structures
Pmhm: Dams
Click to expand Pmhmb: Types of dams
Click to expand Pmhmr: Parts of dams

Find documents having Dams

Broader Term:
Pmh: Hydraulic structures
 
Related Terms:
Pmhb: Harbors
Pmhd: Coast and river protective works
Pmhe: Lighthouses
Pmhj: Canals and waterways
Pmhp: Irrigation and drainage structures
Pmhs: Water supply and distribution structures
Pmhv: Sewerage structures
Pmhy: Offshore structures
TRIS is a bibliographic database funded by sponsors of the Transportation Research Board (TRB), primarily the state departments of transportation and selected federal transportation agencies. TRIS Online is hosted by the National Transportation Library under a cooperative agreement between the Bureau of Transportation Statistics and TRB.
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