Transportation Research Thesaurus

"The TRT Web site allows users to access terminology through Alphabetical, Hierarchical, Keyword In Context or Keyword Out of Context displays. The full display shows relationship of terms including SN (Scope Notes), UF (used for terms), BT (Broader Term), NT (Narrower Term), and RT (Related Term). Through the use of the TRT's standardized vocabulary, the transportation community's access to information has been improved. A tool to improve the indexing and retrieval of transportation information.

Code of Federal Regulations

"The Code of Federal Regulations (CFR) annual edition is the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. It is divided into 50 titles that represent broad areas subject to Federal regulation. The 50 subject matter titles contain one or more individual volumes, which are updated once each calendar year, on a staggered basis.


"Die Umwelt-Klassifikation dient der inhaltlichen Erschließung von Objekten (Literatur, F&E-Vorhaben/ -beschreibungen, Rechtsvorschriften, …) im interdisziplinären Themenbereich 'Umwelt'. Sie ermöglicht deren Zuordnung zu bestimmten Umweltthemen und erleichtert damit ein treffsicheres aber gleichzeitig umfassendes (Wieder-) Auffinden. Diese Zuordnung erfolgt in der Regel als Metainformation in Verzeichnissen über den Ablageort der Objekte (z. B. Datenbanken, Bibliothekskataloge).

"The environmental classification serves the content development of objects (literature, R & D projects / legislation, ...) in the interdisciplinary thematic area 'Environment', which makes it possible to assign them to specific environmental topics, thus facilitating an accurate yet comprehensive (re- ) This classification is usually presented as a meta-information in directories about the storage location of the objects (eg databases, library catalogs) For clarification, the classification can be imagined as a group of 14 columns that symbolize the environmental areas (Eg, LU11, WA54)

UNESCO Thesaurus

"The UNESCO Thesaurus is a controlled and structured list of concepts used in subject analysis and retrieval of documents and publications in the fields of education, culture, natural sciences, social and human sciences, communication and information. Continuously enriched and updated, its multidisciplinary terminology reflects the evolution of UNESCO's programmes and activities. The first edition of the Thesaurus was released in English in 1977, with French and Spanish translations in 1983 and 1984. The second revised and restructured version was released in 1995.