BFO doesn't have temporal extension that is present in other ontologies in OBO.

[DnlRKorn]

Currently the artifacts present in OBO point to https://github.com/BFO-ontology/BFO, which has fewer terms than https://github.com/BFO-ontology/BFO-2020; specifically

• BFO:0000117 (has occurrent part)
• BFO:0000167 (has participant at all times)

Are both present in other ontologies in OBO but not in our linked OWL for BFO. (https://github.com/BFO-ontology/BFO-2020/blob/12ac8c8b0924ebe5bb049c2173e89f23fc0ad6ad/src/owl/profiles/temporal%20extensions/temporalized%20relations/owl/bfo-temporalized-relations.owl#L771)

[jamesaoverton]

BFO publishes several different versions, listed in their configuration here: https://github.com/OBOFoundry/purl.obolibrary.org/blob/master/config/bfo.yml

Maybe this is the one you want? http://purl.obolibrary.org/obo/bfo/2020/bfo.owl