> The relational model itself doesn't care what "values" are. Maybe I misunderstand what you are arguing, but the relational model is defined in terms of value

> The relational model itself doesn't care what "values" are. Maybe I misunderstand what you are arguing, but the relational model is defined in terms of values, sets, and domains (data types), but of course the domains chosen for a particular database schema depends on the business requirements.