Project Status: Complete

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Terminology Services

The Terminology Services prototype was retired on 20 November 2015.

This prototype employed library and web standards to make the terms, relationships and other information in controlled vocabularies available as resources on the web. Since its release, the functionality of this prototype was largely replaced by linked data services such as those offered by the Library of Congress and the U.S. National Library of Medicine. For this reason, it was retired. However, the FAST Linked Data service will continue to be accessible at

Please see the list below for other sites/services that provide access to the controlled vocabularies that were accessible through the Terminology Services prototype.

Terminology Services Overview

Controlled vocabularies, such as thesauri and subject heading systems, provide representations of people, places, events, and concepts. Any subject of speech, writing, or visual depiction, may be represented in a controlled vocabulary and used to describe and access resources such as books, photographs, and web sites.

This prototype enabled users to experiment with the vocabularies and services in a variety of ways, including:

  • as a source of terms for social tagging
  • for query refinement in search applications
  • to provide context for a search term
  • to validate names and subjects in metadata

Users could also use Terminology Services to build their own applications to:

  • Search descriptions of controlled vocabularies
  • Search for terms/headings in a controlled vocabulary
  • Retrieve a single term/heading by its identifier
  • View relationships for a term/heading including equivalence, hierarchical, and associative
  • Retrieve terms/headings in multiple representations, such as HTML, MADS, MARC XML, SKOS, and Zthes.




Diane Vizine-Goetz

Team Members

Carol Hickey

Andrew Houghton

Roger Thompson

JD Shipengrover