In SDDM, is it possible to extend the user of domains to the column definitions for external tables? When creating an external table, we don't have the option of using existing domain definitions when defining the columns. It would be very useful to access domain definitions since the external tables can be used to load data into the application which is being modelled. Or if it was possible in the table definition on the Relational Model diagram to indicate that the relational will be an external table. If this were the case, then the existing domain model and tools are already available.