| 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). [Search TGM] [view PPOC introduction]. |
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As of
October 2007, the Thesaurus for Graphic
Materials I: Subject Terms (TGM I)
and the Thesaurus for Graphic Materials
II: Genre and Physical Characteristic Terms (TGM
II) were merged into a single vocabulary, the Thesaurus
for Graphic Materials, and migrated
to new software.
The merged TGM is available for searching in the Prints & Photographs
Online Catalog (PPOC). Application guidelines for
genre/format terms (TGM II) follow.
A separate genre/format
term list for downloading will continue to be available.
Guidelines for subject indexing (TGM I) are available
at the TGM I home page.
Although the thesaurus content remains essentially the same, there are some minor changes in field structure and labeling. For example, Public Note is now called Scope Note. Additionally, new fields were added to clarify term usage. For further information on these changes see "Fields in Term Record Displays" (via PPOC - About the Thesaurus).
Introduction
Contact the TGM editors at: tgmed@loc.gov
Go to:
Library
of Congress