With the Library’s new Authorities and Vocabularies web service, both people and machines are now able to programmatically access authority data at the Library. LCSH is the initial offering.
One of the interesting aspects of this function is being able to follow a timeline, of sorts, of the subject heading you’re seeking information about. Not only are alternate labels and broader terms provided, but also a date is given when the term was actually created and the last time it was modified. This information can be useful in tracking shifts and trends in terminology over the years.
Over the next few months, the Library will also be expanding to other vocabularies commonly found in standards that the institution supports, such as the Thesaurus of Graphic Materials, geographic area and language, and preservation events and roles.
The Library is regularly updating its LCSH list. Weekly lists of new and changed subject headings are posted on the Cataloging Policy and Support Office website as they are approved.
A. Woman at Main Reading Room card catalog in the Library of Congress. 1930-1950. Prints and Photographs Division. Reproduction Information: Reproduction No.: LC-USZ62-100400 (b&w film copy neg.); Call No.: Information Office <item> [General Collections]
B. This boy has brought a book to Public School Eight, which he is showing to fellow pupils during class discussion. 1943. Prints and Photographs Division. Reproduction Information: Reproduction No.: LC-USW3-013968-E (b&w film nitrate neg.); Call No.: LC-USW3- 013968-E [P&P]