Cataloging News - 2006
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eSH® 2006 - Implications for LocatorPlus and the NLM Catalog
The National Library of Medicine® (NLM) adopted the 2006 MeSH vocabulary for cataloging and for records being created by collaborating data producers beginning on November 21, 2005.
Accordingly, MeSH subject headings in LocatorPlus were changed to reflect the 2006 MeSH vocabulary and appear in that form as of November 21, 2005. The NLM Catalog's translation tables have been updated to reflect 2006 MeSH.
MeSH Changes in NLM Bibliographic Records
In general, the Cataloging Section implemented the vocabulary changes in NLM bibliographic records for books, serials, and other materials, as they were applied for citations in MEDLINE. For highlights about 2006 MeSH, see the article What's New for 2006 MeSH®. NLM Tech Bull. 2005 Nov-Dec;(347):e8. and the article "Bird Flu" Terminology and Changes to Influenza A Viruses and Related Headings. NLM Tech Bull. 2005 Nov-Dec;(347):e10. discussing changes for the Influenza A virus and related headings.
Additional Database Changes in LocatorPlus
The simplification of NLM policy for subject strings necessitated a number of database changes as outlined below. For a full description of this new policy and information about the impact of these changes on NLM bibliographic record distribution, see the article Subject Headings in NLM MARC 21 Products. NLM Tech Bull. 2005 Sep-Oct;(346):e6. Other changes were made to data structure in order to conform to the latest edition of the MARC 21 Format for Bibliographic Data published by the Library of Congress.
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Changes to use and contents of subfield $9 in MARC 21 field 650 (Topical MeSH terms)
In connection with the changes to the reconstruction of MeSH subject strings in certain MARC 21 licensed bibliographic products announced in October 2005 , all occurrences of subfield $9 coded with the value "a" have been removed from MARC21 field 650 in LocatorPlus.
In some instances, MeSH topical headings (MARC 21 field 650) continue to include the local subfield $9 with the value "n." This coding is used to prevent publication types from attaching inappropriately on NLM bibliographic records that are distributed to licensees.
Examples:
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Use of $9 in field 650 prior to Adoption of MeSH 2006 650 12 $a Preventive Medicine $9 a 650 12 $a Parenting 650 22 $a Child 650 22 $a Infant 659 _7 $a Instruction $2 mesh Use of $9 in field 650 after Adoption of MeSH 2006 650 12 $a Preventive Medicine 650 12 $a Parenting 650 22 $a Child $9 n 650 22 $a Infant $9 n 655 _2 $a Instruction |
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Consolidation of all Publication Types / Genre terms in MARC 21 field 655 and the discontinuation of NLM local field 659
NLM no longer uses two separate fields, the MARC21 field 655 and the NLM local field 659 to distinguish between certain Publication Types / Genres in LocatorPlus. All Publication Types (PT) and Genre terms now appear in the 655 field; the locally defined 659 field is no longer used for publication types at NLM.
Additionally, all MeSH Publication Types in field 655 are now coded with Indicator 2 set to "2" to indicate that these are current MeSH. When the publication type used exists in MeSH, previous coding of the 655 field using Indicator 2 set to "7" with subfield $2 of "mesh" has been discontinued. However, publication types and genre terms assigned from a thesaurus other than MeSH also appear in the 655 field; these are coded with Indicator 2 set to "7" and the MARC 21 code for the source of term appears in subfield $2.
Examples:
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Publication Types / Genres prior to Adoption of MeSH 2006 655 _ 7 $a Popular Works $2mesh 659 _ 7 $a Broadsides $2 mesh 659 _ 7 $a Oral Histories $2 aat Publication Types /Genres after Adoption of MeSH 2006 655 _ 2 $a Broadsides 655 _ 2 $a Popular Works 655 _ 7 $a Oral Histories $2 aat |
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Elimination of NLM local field 691 (CAS Registry Number) in Space Life Sciences Collaborative Partner Records
NLM removed all CAS registry number information from the NLM local field 691 in LocatorPlus records. This change affected all bibliographic records created by the National Aeronautics and Space Administration (NASA) as an NLM collaborative partner (identified in the MARC View with the NLM local field 998 coded with the value "NASREL").
Jacobs, A., Scheel, M. Cataloging News - 2006. 2005 Nov-Dec; (347):e15.
