MEDLINE End of Year Processing Information

NLM is involved in MEDLINE year-end processing activities which include changing MeSH, Substance Names and other global changes.  This always causes a temporary suspension in indexing citations. 

So here are some important dates to note:

  • November 16, 2011: NLM expects to temporarily suspend the addition of fully-indexed MEDLINE citations to PubMed. Publisher-supplied and in process citations will continue to be added.
  • Mid-December 2011: PubMed MEDLINE citations, translation tables, and the MeSH database will have been updated to reflect 2012 MeSH.

For details about the impact on searching from November 16 to mid-December, see: Annual MEDLINE/PubMed Year-End Processing (YEP): Impact on Searching During Fall 2011.

For background information on the general kinds of changes made annually, see: Annual MEDLINE/PubMed Year-End Processing (YEP): Background Information.

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