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. Filing indicator fixes and MARC Update processing are included at no additional charge in any authority control work performed by LTI. 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)
LTI handles four types of authority control: A) LC names (including uniform titles and series) and LC subjects; B) LC Children's subjects; C) NLM MeSH subjects; and D) genre headings. While LTI does not provide authority control of Sears headings, we do provide several options for processing them.
LC Children's Subject Headings
Libraries whose catalog records contain LC Children's subject headings have several choices. These headings can be: (a) ignored during authority control processing; (b) processed as LC Children's (using the appropriate "sj" 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. There is no additional charge for authorizing LC Children's headings or converting them to LCSH.
Sears Subject Headings
Libraries whose catalog records contain Sears subject headings have several choices. These headings can be: (a) ignored during authority control processing; (b) deleted from the library’s bibliographic records; or, (c) forced to LCSH headings. Juvenile subdivisions are not added to Sears headings converted to LCSH.
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.
Special Series 490 0 Processing
While untraced series (i.e., those tagged as 490 with a first indicator of '0') have generally been excluded from standard authority control processing, LC's decision effective 6/01/06 to no longer create added entries for series makes it essential that libraries have a mechanism to continue to treat series as controlled headings. The "untraced series" option allows for the authorization of 490 0 fields. For libraries selecting this option, if the first indicator in a 490 field is set to '0', LTI changes the indicator value to '1' and generates an appropriate 8XX (traced series) field. If the newly created 8XX field is linked to an authorized heading during authority control, the 490 1 and authorized 8XX are retained.
If the LTI-created 8XX field remains unlinked following authority control, two options are available: (1) delete the LTI-created 8XX field and change the 490 first indicator back to '0'; or, (2) retain the 490 series with a first indicator of '1' and the LTI-created (but unlinked) 8XX series heading. When the form in the 8XX field cannot be matched to an authority record, LTI recommends that the 490 1 / 8XX combination be retained. Should an authority record later be distributed, it will be provided to the library when the heading is authorized during a continuing [AEX or AUP] authority control run. For libraries retaining the 490 1 / 830 series, we further advise that 490 1 fields not be indexed. The same advice would apply to 490 0 fields but, under this option, none of these fields will remain in the database.
Treatment of 440/830 Title Series
LTI's standard practice is to retag 440 fields as 490 1 and to create an 830 field based on the content of the 440 field. The series in the 830 field receives authority control. Some libraries prefer that LTI restore unchanged 830 fields back to 440.