No luck on the Esri forums, so I thought I would try here.
I was trying to determine the best way to standardize my attribute table. I thought first I would just use a coded value domain but I am unable to without creating a subtype first, I don't understand this but figured I would just create a blank subtype to create the coded value domain, trouble is subtypes require a Long integer field which when exported to a shapefile are meaningless, just a number in a field. So I decided to just create a new subtype properly. I attempted to delete the before mentioned domain and I get the error "Failed to delete a domain from the database. The domain is used by an attribute rule" Trouble is I removed that "attribute rule but it still wont delete. The idea of subtypes and domains are a great idea but this locking problem and the subtype field requirement of being an integer rather than String is an issue for me. Any help would be appreciated, for now I will just create the subtype and leave the domain.