Please use our tracker for new relation requests, etc
https://github.com/oborel/obo-relations
We hope to be able to accept contributions to the ontology in the form of Pull Requests in the future. Note that this is currently difficult for OWL, see:
http://douroucouli.wordpress.com/2014/03/30/the-perils-of-managing-owl-in-a-version-control-system/
OWLAPI developers are working to circumvent this. In the interim, PRs can only be accepted if you have a LOCK on the editors file. See src/ontology/README-editors.md for details.