- Units of measurement ontology CC-BY-4.0
Units of measurement ontology project; original artifact license CC-BY-4.0 (https://creativecommons.org/licenses/by/4.0/); https://obofoundry.org/ontology/uo.html
http://purl.obolibrary.org/obo/UO_0000004 ; https://purl.obolibrary.org/obo/uo.owl ; snapshot SHA-256 6b29d48454d1e8b6ec07a1d3e7e22012c0e4933a5fb1ef7c0beaa106e7367e10 ; exact artifact license https://creativecommons.org/licenses/by/4.0/ ; retrieved 2026-11-07