- PROCO: PROcess Chemistry Ontology CC-BY-4.0
PROCO: PROcess Chemistry Ontology project; creators: Anna Dunn; Wes A. Schafer; Yongqun "Oliver" He (YH); Zachary Dance; original artifact license CC-BY-4.0 (http://creativecommons.org/licenses/by/4.0/); https://obofoundry.org/ontology/proco.html
http://purl.obolibrary.org/obo/PROCO_0000256 ; https://purl.obolibrary.org/obo/proco.owl ; snapshot SHA-256 c11ac45665556bd352075fac67f585d1a62fff606097a72a0ee3ab672edd373d ; exact artifact license http://creativecommons.org/licenses/by/4.0/ ; retrieved 2026-11-07