Thesaurus of Graphic Materials
http://id.loc.gov/vocabulary/graphicMaterials.html
The Library of Congress is pleased to announce the enhancement of its
ID.LOC.GOV web service, Authorities and Vocabularies, which provides
access to Library of Congress standards and vocabularies as Linked
Data. In addition to technological refinements aimed at improving the
user experience, we now offer additional vocabularies:
The Thesaurus for Graphic Materials is a tool for indexing visual
materials by subject and genre/format.
The thesaurus includes more than 7,000 subject terms to index topic
shown or reflected in pictures, and 650 genre/format terms to index
types of photographs, prints, design drawings, ephemera and other
categories. New terms are added regularly. TGM is searchable through
the Prints and Photographs Online Catalog (PPOC).
The vocabulary data are available for bulk download.
Additional vocabularies will be added in the future, including (among
others) the MARC code lists for geographic areas, countries and
languages and additional PREMIS controlled vocabularies.
The Authorities and Vocabularies web service was first made available in
May 2009 and offered the Library of Congress Subject Headings (LCSH),
the Library's initial entry into the Linked Data movement. In part by
assigning each vocabulary and each data value within it a unique
resource identifier (URI), the service provides a means for machines to
semantically access, use, and harvest authority and vocabulary data that
adheres to W3C recommendations, such as Simple Knowledge Organization
System (SKOS). In this way, the Authorities and Vocabularies web
service also makes government data publicly and freely available in the
spirit of the Open Government directive. Although the primary goal of
the service is to enable machine access to Library of Congress data, a
web interface serves human users searching and browsing the vocabularies.
We are very interested to get feedback on the uses and usefulness of
the service to inform ways that we might enhance it. (There is a
comment form at the site.).
Please explore it for yourself at http://id.loc.gov.
Rebecca S. Guenther
Senior Networking & Standards Specialist
Network Development & MARC Standards Office
Library of Congress
101 Independence Ave SE
Washington, DC 20540
voice: +1.202.707.5092
fax: +1.202.707.0115
[email protected]
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