# **Welcome to Medical Subject Headings**

The Medical Subject Headings (MeSH) thesaurus is a controlled and hierarchically-organized vocabulary produced by the National Library of Medicine. It is used for indexing, cataloging, and searching of biomedical and health-related information. MeSH includes the subject headings appearing in MEDLINE/PubMed, the NLM Catalog, and other NLM databases.

## Recent MeSH Updates

Visit our What's New  page to see all recent MeSH developments including the most recent ones listed below
        - 2024 MeSH files are now in production             - The MeSH Browser now displays   2023 MeSH   and  2024 MeSH   vocabularies  
          - Reports of MeSH changes now appear on our   What's New   page
          - All 2023 MeSH files are now available on the   MeSH Download Page   or by downloading directly from the   MeSH FTP 
        - MeSH in Resource Description Format(RDF)               - MeSH RDF FTP   now contain 2023 MeSH in RDF format
          - An    open MeSH API   is available for retrieving MeSH data
          - You can also use our   SPARQL query editor  for querying MeSH data 

## Obtain MeSH Data

        - Download MeSH Data 
        - Lists of  annual changes to MeSH 
        - MeSH on Demand 
        - Access RDF MeSH Data 
        - View MeSH Pubtypes 

## Learn About MeSH

        - Tutorials and Webinars
        - MeSH Vocabulary           - Introduction to MeSH
          - Browser Instructions
          - Finding Keywords for Publications
          - MeSH Qualifiers List
          - MeSH Qualifiers with Scope Notes
          - Publication Characteristics (Publication Types) with Scope Notes 
        - Search and Retrieval using MeSH           - Cataloging with MeSH Terminology
          - Searching PubMed® Using MeSH Search Terms
          - PubMed® Online Training 

## Related MeSH Efforts

        - RxNorm:  A drug vocabulary used for e-prescribing, formulary, medication history, government reporting, drug compendia mapping, and other uses
        - Daily Med:  Provides trustworthy information about marketed drugs in the United States
        - Unified Medical Language System (UMLS®) Metathesaurus:  A collection of biomedical names and codes grouped as sets of synonyms, derived from over 150 medical vocabulary sources.
        - NLM Classification:  A NLM vocabulary used for the arrangement of library materials in the field of medicine and related sciences.

## User Input and Suggestions

        - Make Suggestions  for new MeSH vocabulary
        - Corrections:  Please let us know if you find a mistake in MeSH
        - Downloading or Other Problems:  Our technical staff can help

## Archived Publications

        - 2014 DailyMed/RxNorm Jamboree Workshop  Last updated: September 29, 2014
        - 2015 DailyMed/RxNorm Jamboree Workshop  Last updated: October 14, 2015
        - 2016 DailyMed/RxNorm Jamboree Workshop  Last updated: November 11, 2018
        - 2017 DailyMed/RxNorm Jamboree Workshop  Last updated: November 11, 2018
        - Alphabetic Listing of MeSH  Last updated: December 6, 2016
        - Changes in ASCII MeSH Format  Last updated: April 9, 2016
        - Deleted Descriptors - 2018  Last updated: January 6, 2017
        - Files Available to Download  Last updated: November 29, 2018
        - MeSH Staff Presentations and Publications  Last updated: June 22, 2016
        - MeSH Staff Presentations and Publications (Archive)  Last updated: April 24, 2013
        - SPL/DailyMed Jamboree Workshop 2013  Last updated: December 3, 2016
        - Use of Medical Subject Headings For Cataloging  Last updated: October 29, 2019

Last Reviewed: January 22, 2024