An IUPAC project (apparently in collaboration with CODATA and CIPM, which makes it very official).

• Units of Measure for Humans and Machines, released in Oct 2020
• Digital Representation of Units of Measure in Chem. Int., vol. 42, no. 4, 2020, pp. 36.
• What's the future of digital chemical units?, presentation by Stuart Chalk at ACS Fall in Aug 2021.
• Stop squandering data: make units of measurement machine-readable in Nature vol. 605, 2022, p. 222-224.

Other IUPAC projects on digital standards. Of particular interest to us are Machine-accessible periodic table and Development of a standard for FAIR data management of spectroscopic data.