NHTSA Header Logo NHTSA Header Logo
New Search Browse Advanced Search Search History Marked Records TRT Help Return to NHTSA

Transportation Research Thesaurus

TRT Home | Hierarchical View | Alphabetical View | Download | About
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> Communication and control > Detection and identification > Detection and identification systems

Dm: Detection and identification
Dmb: Detection and identification systems
Click to expand Dmbj: Identification systems
 Dmbm: Monitoring
 Dmbr: Remote sensing
 Dmbt: Surveillance
Click to expand Dmby: Detection and identification system applications

Broader Term:
Dm: Detection and identification
 
Related Terms:
Dmg: Detection and identification devices
Web Policies & Notices  |   Terms of Use  |   FOIA  |   Privacy Policy  |   Cookie Policy  |   Accessibility  |   Email NHTSA
Plug-ins: PDF Reader | Flash Player | Excel Viewer | PowerPoint Viewer | Word Viewer | WinZip
Powered by NTL Integrated Search