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Cataloging: Using Medical Subject Headings (MeSH®) in Cataloging

Module 8—Deconstructed Headings vs. Subject Strings

page 6 of 9


Special Cases

  • If the NLM record does not contain any 650 terms, but does contain a 651, then the term is distributed as a 651 in the MARC 21 output
  • Example:
    • NLM files
      • 651 _2 $a Sierra Leone
    • MARC 21 distribution
      • 651 _2 $a Sierra Leone.
  • If the NLM record does not contain any 650 or 651 terms, but does contain a 655, then the term is distributed as a 655 in the MARC 21 output
  • Example:
    • NLM files
      • 655 _2 $a Periodicals
    • MARC 21
      • 655 _2 $a Periodicals.
  • If the NLM record does not contain any 650 terms, but does contain a 651 and 655, then the 655 is appended as $v to the 651
  • Example:
    • NLM files
      • 651 _2 $a China
      • 655 _2 $a Handbooks
    • MARC 21
      • 651 _2 $a China $v Handbooks.


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