Replace ChEBI internal relations with RO relations
There are several identifiers for relationships in ChEBI such as chebi:is_conjugate_acid_of
that can be upgraded to re-use Relation Ontology properties (in this case, RO:0018034
)
Note that the relationship for major microspecies does not appear in the ChEBI OBO, so please let me know if this has been obsoleted.
I'm not sure exactly where is the first place this is defined, but inside the chebi-schema.sql document at https://gitlab.ebi.ac.uk/chembl/chebi/chebi-2.0/chebi-etl/-/blob/master/chebi-schema.sql#L1116 seems like it might be the first place.
@carlosm does it make sense to PR on to this file? Or is there another place to start this process?