Authority control processing includes many changes to controlled headings. These changes are designed to make records conform to AACR2 and the most current cataloging and content designation standards, including format integration changes. Filing indicator fixes and MARC Update processing are included at no additional charge in any authority control work performed by LTI. LTI's MARC Update Changes are identified in a separate document. The following tag level changes are included in all authority processing jobs.
301 → 300 305 → 300 *400 → 800 *410 → 810 *411 → 811 *440 → 830 705 → 700 715 → 710 840 → 830
(*appropriate 490 1 field generated automatically)
Five types of authority control are listed below: A) LC names (including uniform titles and series) and LC subjects; B) LC Children's subjects; C) NLM MeSH subjects; D) Sears subjects; and, E) genre headings. For each of the five categories for which authority control is desired, check whether limited or full manual review is wanted. Pricing is based on the number of records in the database, not the number of records that happen to contain one or more headings needing authorization. For example, if a library requesting NLM MeSH authority control has a database of 100,000 catalog records, but only 25,000 of them contain a MeSH heading, the per record charge for MeSH authority control is multiplied by 100,000 -- not 25,000.
Libraries whose catalog records contain LC Children's or Sears subject headings have several choices. These headings can be: (a) ignored during authority control processing; (b) processed as LC Children's or Sears (using the appropriate "sj" or Sears authority records); or, (c) forced to LCSH headings. When LC Children's headings are converted to LCSH, appropriate subject subdivisions (e.g., Juvenile literature, Juvenile fiction) are added to the heading. Juvenile subdivisions are not added to Sears headings converted to LCSH. The library is charged the same per record fee as if the record received limited review LC Children's and/or Sears subject authority control.
Genre headings can be authorized for GSAFD (Guidelines on Subject Access to Individual Works of Fiction, Drama, Etc.), LCGFT (Library of Congress Genre/Form Terms for Library and Archival Materials), and MeSH (Medical Subject Headings).
If desired the library can convert GSAFD headings to LCGFT headings. Of the roughly 150 terms appearing in the GSAFD list, most are identical to the LCGFT term and the remainder have equivalent terms in LCGFT. Selecting this option results in the conversion of GSAFD terms presently tagged as 655 _7 $a[term] $2gsafd to the same tag, indicator of 7, but with a $2lcgft subfield. For example,
655 _7 $aSpy stories$2gsafd is changed to
655 _7 $aSpy stories$2lcgft
A second genre processing option is intended to impose greater consistency on genre headings that libraries have formerly coded as LCSH topical headings. Because nearly all form/genre headings are also valid topical subject headings, over the years many libraries, in the absence of official LC genre authority records, coded genre headings as topical subjects. This LTI option makes it possible for many of these topical subjects to be converted to 655 LCGFT genre terms. Conversion is limited to headings that have been identified as usable also as form or genre and which conform to the guidelines prescribed by LC. Currently, geographic subdivision and "language of film" headings will not be authorized. Consequently, LTI will convert only those headings without nationality or language modifiers and without subdivisions. For example,
650 _0 $aAmateur films is converted to 655 _7 $aAmateur films$2lcgft
[650 _0 $aAmateur films$zFrance] and [650 _0 $aAmateur films$xAwards] remain unchanged.
Similarly, 650 _0 $aShort stories is converted to 655 _7 $aShort stories$2lcgft
[650 _0 $aShort stories, American] and [650 _0 $aAmerican newspapers] remain unchanged.