Test version of OBI using COB as our top-level ontology

[James A. Overton]

Hi everyone,

A new OBI release is available:

https://github.com/obi-ontology/obi/releases/tag/v2025-07-28

This release includes a new `obi-cob.owl` file that uses COB as the top-level ontology for OBI:

http://purl.obolibrary.org/obo/obi/2025-07-28/obi-cob.owl

We are planning to use COB as the top-level of OBI in the primary `obi.owl` file starting at the end of October. Ontologies that import from OBI are strongly encouraged to test `obi-cob.owl` in their workflows as soon as possible.

See <https://github.com/obi-ontology/obi/issues/1857> for details on OBI's transition to COB, and leave a comment about your testing: whether it worked or what problems you ran into.

Best,

James