From the National Library of Medicine Tech. Bulletin:
MeSH is the National Library of Medicine (NLM) controlled vocabulary thesaurus that is updated annually. NLM uses the MeSH thesaurus to index articles from thousands of biomedical journals for the MEDLINE/PubMed database and for the cataloging of books, documents, and audiovisuals acquired by the library.
Overview of Vocabulary Development and Changes for 2018 MeSH
- 474 Descriptors added
- 106 Descriptor terms replaced with more up-to-date terminology
- 7 Descriptors deleted
- 1 Qualifier (Subheading) deleted
Totals by Type of Terminology
- 28,939 MeSH Descriptors
- 79 Qualifiers
- 116,909 Total Descriptor Terms
- 244,154 Supplementary Concept Records
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