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Cataloging and Metadata Management: Fundamentals of the NLM® Classification

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Index—General

  • Single index to the schedules
  • Primarily Medical Subject Heading (MeSH) concepts used in cataloging
  • Arranged in alphabetical order
  • Includes NLM Classification numbers for medical concepts
  • Includes LCC numbers for non-medical concepts (must be verified)
  • Not a substitute for the main schedules
  • Many headings are assigned a range of numbers rather than a specific number
  • Updated annually to reflect MeSH changes

Index—Relationship to MeSH

  • All main index headings are MeSH
  • All terms available in the MeSH thesaurus are not reflected in the Index
    • Index terms are included based on literary warrant reflected in the NLM collection
    • Supplementary concept records (SCRs) are not used in cataloging and are therefore excluded from the index
    • Very specific terms are generally excluded


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