MEDLINE®/PubMed® Year-End Processing (YEP) Activities

The National Library of Medicine® (NLM®) is currently involved in MEDLINE year-end processing activities. These include changing the Medical Subject Headings (MeSH®) and Supplementary Concept Substance Names on existing MEDLINE citations to conform with the 2008 version of MeSH, and other global changes.

Important Dates

• November 14, 2007: NLM expects to temporarily halt the addition of fully-indexed MEDLINE citations to PubMed.
  
  
• Early December 2007: PubMed's MEDLINE citations, translation tables, and the MeSH database have been updated to reflect 2008 MeSH.

For details about the impact on searching from November 14 to early December, see: Annual MEDLINE®/PubMed® Year-End Processing (YEP): Impact on Searching During Fall 2007.

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

MEDLINE®/PubMed® Year-End Processing (YEP) Activities. NLM Tech Bull. 2007 Sep-Oct;(358):e10.