Modify as in updating existing domains by adding, inserting, removing, and sorting code-description pairs
(Whether export to table-->modify exported copy-->delete existing domain-->create new domain with identical name-->import with the same domain name would arrive at the same result I don't know. But I can't use ArcGIS GP Tools to do this because they don't seem to honor the oracle "become user" syntax I need to use for connecting to the geodatabase.)
Thanks for your help.