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NewsBits September 24th, 2018
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MEDLINE/PubMed Year-End Processing Activities for 2019

Posted by on September 12th, 2018 Posted in: Announcements, NLM Resources, PubMed, Search Tools


The National Library of Medicine (NLM) is currently involved in MEDLINE year-end processing (YEP) activities. These include changing the Medical Subject Headings (MeSH) main headings and subheadings as well as Supplementary Concept Records that standardize names and associated numbers for chemicals, protocols, diseases and organisms that are not main headings. The MeSH edits include maintaining existing MEDLINE citations to conform with the 2019 version of MeSH, and other global changes.

Important Dates

  • November 28, 2018: NLM expects to temporarily suspend the addition of fully-indexed MEDLINE citations to PubMed. NLM will continue to add Publisher-supplied and in process citations.
  • Mid-December 2018: PubMed MEDLINE citations, translation tables, and the MeSH database will have been updated to reflect 2019 MeSH.

For details about the impact on searching from November 28 to mid-December, visit Annual MEDLINE/PubMed Year-End Processing (YEP): Impact on Searching During Fall 2018.

In addition, an alternate link to provide access to 2019 MeSH is available from the top navigation bar on the MeSH Browser homepage. The default year in the MeSH Browser remains 2018 MeSH for now. Sometime in November or December, the default year will change to 2019 MeSH and the alternate link to 2018 MeSH.

Image of the author ABOUT Alan Carr
Alan Carr is the Associate Director, National Network of Libraries of Medicine, Pacific Southwest Region, based at UCLA.

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This project is funded by the National Library of Medicine, National Institutes of Health, Department of Health and Human Services, under Cooperative Agreement Number UG4LM012341 with the UCLA Louise M. Darling Biomedical Library.

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