From the NLM Technical Bulletin:
The National Library of Medicine (NLM) is pleased to announce an updated beta release of MeSH (Medical Subject Headings) RDF (Resource Description Framework).
This most recent beta release will be based on the 2016 MeSH and will incorporate an approach to the maintenance of deleted URIs (Uniform Resource Identifiers). Specific changes to the MeSH RDF schema for this release are documented in the notes available at https://hhs.github.io/meshrdf/release-notes.html.
Technical documentation along with sample SPARQL queries and our versioning policy are available at https://hhs.github.io/meshrdf/. NLM will implement a new versioning policy on or about December 3, 2015.
Have questions or want to provide feedback? Let us hear from you. Join us on GitHub at https://github.com/HHS/meshrdf/issues/ and tweet us using #NLMLD.
To learn more about the overall project check out our information page at https://id.nlm.nih.gov/mesh/.