Medline/PubMed Baseline Repository Home page logo. Four disks that represent databases with the words MEDLINE, Baseline, Repository, and 2002 - Present in the disks to show that we have baseline information starting in 2002.
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 Please Note
  • The records included in the MEDLINE/PubMed Baseline databases represent a static view of the data at the time each baseline database was created.

  • To access the MeSH files under the MeSH MBR Files link, you must enter into an online Memorandum of Understanding for use of the MeSH Vocabulary data.

  • To access the MBR Query Tool, you must be a recognized licensee of NLM Data. NLM leases MEDLINE/PubMed to U.S. and non-U.S. individuals or organizations and to its formally recognized International MEDLARS Centers. We update the authorization information daily at 1800 Eastern Standard Time.

  • We monitor and provide support for this site from 0800 to 1700 (Eastern Standard Time) Monday to Friday, excluding holidays. If you experience any problems while using the MBR web site, or would like additional information about leasing MEDLINE/PubMed data, send an e-mail to NLMdatadistrib@nlm.nih.gov.
Researchers have requested the ability to have available MEDLINE citations in the state they were at a given moment in time without the MeSH vocabulary updates and other revisions that occur during the year. The MEDLINE/PubMed Baseline Repository was set up to provide this capability. We have stored the baseline snapshot created at the beginning of each new MeSH Indexing Year containing the MEDLINE, OLDMEDLINE, and PubMed-not-MEDLINE records for each year starting in 2002 along with a selection of the associated MeSH Vocabulary data files.

The baselines are normally generated towards the middle of November each year and contain all completed citations in MEDLINE as of that date. The baselines represent MEDLINE after the year-end processing has been completed. This means that the records have been revised with the upcoming year's new MeSH vocabulary terms. We currently have available the 2002 - 2014 MEDLINE/PubMed Baselines. The naming of the baselines represents this year-end processing. For example, the 2002 MEDLINE/PubMed Baseline contains all completed citations from the mid-1960's until the date the baseline was created in late November 2001 with the year-end processing assigning appropriate 2002 MeSH vocabulary terms, thus it is a baseline for the 2002 year.
 Information
Background
MBR Reference Material
MUID to PMID Conversion Files
MetaMapped MEDLINE Baselines
MEDLINE Baseline Statistical Reports
 Resources
MEDLINE Co-Occurrence File (MRCOC)
List of Available MBR Resources
Available MBR Downloads
MBR Query Tool (Restricted Access)

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