- Symptom Ontology CC0-1.0
Symptom Ontology project; original artifact license CC0-1.0 (https://creativecommons.org/publicdomain/zero/1.0/); https://obofoundry.org/ontology/symp.html
http://purl.obolibrary.org/obo/SYMP_0000640 ; https://purl.obolibrary.org/obo/symp.owl ; snapshot SHA-256 9054e6a87d4af4ac18876aef953a5cf151aa0a3d82d15f8850928bd0413e5b87 ; exact artifact license https://creativecommons.org/publicdomain/zero/1.0/ ; retrieved 2026-11-07