From the NLM Tech Bulletin:
The Introduction to MeSH 2015 is now available, including information on its use and structure, as well as recent updates and availability of data.
The default year in the MeSH Browser remains 2014 MeSH for now, but the alternate link provides access to 2015 MeSH.
The MeSH Section will continue to provide access via the MeSH Browser for two years of the vocabulary: the current year and an alternate year. Sometime in November or December, the default year will change to 2015 MeSH and the alternate link will provide access to the 2014 MeSH.
Download 2015 MeSH in XML and ASCII formats.
Also available for 2015 from the same MeSH download page are:
- Pharmacologic Actions (Forthcoming)
- New Headings with Scope Notes
- MeSH Replaced Headings
- MeSH MN (tree number) changes
- 2015 MeSH in MARC format
Beginning on September 4, 2014, the MeSH Browser is being updated each business day. Starting soon, the MeSH XML and ASCII format files for Supplementary Concept Records (SCRs) will be available on this same Monday through Friday schedule. Prior to this change, the MeSH Browser and MeSH XML and ASCII files for SCRs were updated and made available once per week.
This new update schedule releases new and edited SCRs, mostly for chemicals and drugs, in a more timely way for use by both indexers and searchers. Descriptors and qualifiers are changed only on an annual basis.