Difference between revisions of "Types of subject headings"

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[[Category:Subject headings]]
[[Category:Subject headings]][[Category:Local practices]];The only thesauri than may be used locally are<nowiki>:</nowiki>
[[Category:Local practices]]
:LCSH (600/610/611/630/650/651, second indicator 0)
{{review}}
:CYAC (600/610/611/630/650/651, second indicator 1)
==Indicators==
:local headings (690/691)
The second indicator in fields 600-655 determines what type of heading a field is.  Some types of headings should always be retained if appropriate in records in the CCS database, others should always be deleted from records in the CCS database.


{| {{table}}
;''Optionally'', use the following thesauri for Spanish langauge materials<nowiki>:</nowiki>
!Indicator!!Heading type!!Retain or delete
:[http://www.bilindex.com/ Bilindex] (650 7 {{subfield|2}}bidex)
|-
:QLSP (650 7 {{subfield|2}}qlsp)
| 0||Library of Congress subject heading (LCSH)||Retain
|-
| 1||Library of Congress Annotated Card program heading (LCAC)||Retain for children's material (Audn: a, b, c, or j), except delete when used as a 655 field; delete for all other types of material.
|-
| 2||National Library of Medicine heading (MeSH)||Delete
|-
| 3||National Agricultural Library heading (NAL)||Delete
|-
| 4||Source not specified||Delete
|-
| 5||Canadian subject heading (NLC)||Delete
|-
| 6||French Canadian subject heading (NLC)||Retain for French-language material; delete for everything else<ref name=foreignheadings>You may, but are not required to, add French subject headings to French-language material, Spanish subject headings to Spanish-language material, Polish subject headings to Polish-language material, etc.</ref>
|-
| 7||Source specified in &Dagger;2||'''655:''' Retain headings with a source of <code>lcgft</code>. Retain headings on the list of [[local genre headings]], regardless of the source code (e.g. <code>gsafd</code>). Delete all other headings--including those with <code>bidex</code>, even for Spanish-language material.<br/>
'''All other 600s headings:''' Retain headings with a source of <code>lcsh</code>. Retain headings on the list of [[local subject headings]]. Delete all other English-language headings.  For Spanish-language material only, retain headings with source <code>bidex</code> or <code>qlsp</code><ref name=foreignheadings />. Delete <code>bidex</code> headings on non-Spanish materials. For material in a particular language that has an established thesaurus code for headings in that language, retain headings with that code.<ref name=foreignheadings /> Delete all other headings with second indicator 7.
|-
| 8||Sears subject heading||Delete
|}


<references />
Delete all other subject headings.


==Uncontrolled headings==
Uncontrolled heading fields (field 653) should be converted to valid LCSH or deleted.


==British subject headings==
{{draftbox|text=For thesauri in other languages, consult the Data Services Librarian.}}
Do not assume that subject headings coded as LCSH in records from the British National Library (UKM) are valid headings or valid constructions; UKM uses its own subject cataloging rules that sometimes conflict with the Library of Congress' headings and rules.
 
==Form/genre headings==
* Change all unsubdivided and unqualified form/genre headings found in field 650 to field 655 for print material, videorecordings, and radio programs. Use both 650 and 655 for music, until the Library of Congress releases final instructions on handling musical genres and the medium of performance.
* Use LCGFT as the preferred thesaurus for form/genre headings in field 655.
* Do not subdivide, or qualify by nationality, a heading in field 655.
 
==Foreign-language material==
See [[Subject headings for foreign language materials]] for additional instructions specific to materials in a language other than English.

Revision as of 20:29, 16 February 2017

The only thesauri than may be used locally are:
LCSH (600/610/611/630/650/651, second indicator 0)
CYAC (600/610/611/630/650/651, second indicator 1)
local headings (690/691)
Optionally, use the following thesauri for Spanish langauge materials:
Bilindex (650 7 ‡2bidex)
QLSP (650 7 ‡2qlsp)

Delete all other subject headings.

This change is being considered by the SCRAP committee.
Do NOT follow this change. Please send any feedback to SCRAP.

For thesauri in other languages, consult the Data Services Librarian.

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