Domain IDO
If the property is a foreign key, specify the domain IDO of the property; that is, the other IDO where the property is defined.
Note: If you specify a domain IDO here for a bound component, and if there are no validators
defined for that component, the system performs an automatic foreign key validation for
that component and value during a save operation. That means that, if a user enters a value
and then attempts to save it, the system does a check to see if the value that was entered
is valid. If not—that is, if the entered value does not exist in the list of values
returned by a query of the specified domain IDO and property—the system presents a
validation error message to the user and aborts the save operation.