- Population and Community Ontology CC0-1.0
Population and Community Ontology project; creators: http://orcid.org/0000-0002-4366-3088; https://orcid.org/0000-0001-8815-0078; David Osumi-Sutherland; Jie Zheng; Pier Luigi Buttigieg; Ramona Walls; original artifact license CC0-1.0 (http://creativecommons.org/publicdomain/zero/1.0/); https://obofoundry.org/ontology/pco.html
http://purl.obolibrary.org/obo/PCO_0000021 ; https://purl.obolibrary.org/obo/pco.owl ; snapshot SHA-256 c2363da29b19c5af1876b1d5078c8b4958ec43e752eed2fb7eb75f0225d47507 ; exact artifact license http://creativecommons.org/publicdomain/zero/1.0/ ; retrieved 2026-11-07