MEDLINE/PubMed Year-End Processing Activities for 2018

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, and diseases that are not main headings. The MeSH edits include maintaining existing MEDLINE citations to conform with the 2018 version of MeSH, and other global changes.

Important Dates

• November 14, 2017: 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.
• Late November 2017: PubMed MEDLINE citations, translation tables, and the MeSH database will have been updated to reflect 2018 MeSH.

For details about the impact on searching from November 15 to late November, see: Annual MEDLINE/PubMed Year-End Processing (YEP): Impact on Searching During Fall 2017.

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