1NF is defined in terms of attribute domains on the logical model. It all comes down to if the value is atomic with regard to relational algebra. Can you proje

1NF is defined in terms of attribute domains on the logical model. It all comes down to if the value is atomic with regard to relational algebra. Can you project attributes or insert tuples in the value using the standard relational operators? Then it is a relation, and you have a 1NF violation.