Since 2007 the Library of Congress’ Policy and Standards Division (PSD) has been developing genre/form terms, and in June 2010 determined that the new thesaurus, Library of Congress Genre/Form Terms for Library and Archival Materials (LCGFT), should be formally separated from Library of Congress Subject Headings (LCSH). In order to accomplish this, on May 24, 2011 the existing genre/form authority records will be deleted and reissued with new coding.
The current coding for the genre/form authority records indicates that the terms are from LCSH, not LCGFT. The LCCNs are prefixed by “sh” and 008/11 is set to “a,” Library of Congress Subject Headings. Therefore, the LCCNs and MARC coding both need to be revised. This will require the deleting and reissuing of the genre/form authority records.
The approximately 800 existing authority records will be deleted and immediately reissued. About 1600 records (deletes plus reissues) will be sent to subscribers as part of the May 24, 2011, Volume 26, Issue 21, distribution of subject authorities via the MARC Distribution Service (MDS).
Authority records for LCGFT terms will be coded as follows.
LCCN prefix: gf
008/11: z (“Other”)
010 $a gf2011987654 $z sh2009025020
040 $a DLC $b eng $c DLC $f lcgft
155 $a Topographic maps
455 $a Hypsographic maps
455 $a Hypsometric maps
455 $a Relief maps
455 $a Topographical maps
555 $w a $a Maps
[Note that the deprecated LCCN is being retained in field 010$z, to facilitate automatic updates.]
As of May 24, 2011, new coding should be used when assigning LCGFT terms in bibliographic records. That coding is as follows.
655 #7 $a [Term]. $2 lcgft
Title: Survivor: Thailand.
655 #7 $a Survival television programs. $2 lcgft
655 #7 $a Nonfiction television programs. $2 lcgft
The genre/form FAQ http://www.loc.gov/catdir/cpso/genre_form_faq.pdf and the Subject Headings Manual (SHM) will both be updated to reflect this change in policy.
For further information and the rationale for these revisions, please see the January 3, 2011 announcement, “Library of Congress to Reissue Genre/Form Authority Records.” http://www.loc.gov/catdir/cpso/gf_lccn.html
Friday, May 06, 2011
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