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MEDLINE®/PubMed® Year-End Processing Activities

MEDLINE®/PubMed® Year-End Processing Activities. NLM Tech Bull. 2009 Sep-Oct;(370):e3.

September 03, 2009 [posted]

The National Library of Medicine® (NLM®) is currently involved in MEDLINE year-end processing (YEP) activities. These include changing the Medical Subject Headings (MeSH®) and Supplementary Concept Substance Names on existing MEDLINE citations to conform with the 2010 version of MeSH, and other global changes.

Important Dates

  • November 18, 2009: NLM expects to temporarily halt the addition of fully-indexed MEDLINE citations to PubMed.

  • Mid-December 2009: The PubMed MEDLINE citations, translation tables, and the MeSH database will have been updated to reflect 2010 MeSH.


For details about the impact on searching from November 18 to mid-December, see: Annual MEDLINE®/PubMed® Year-End Processing (YEP): Impact on Searching During Fall 2009.

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