Handling of cardinalities of attributes

[JDziurlaj]

Attributes get transformed to entities when the upper or lower cardinality is greater than one. This is to conform to first normal form (1NF). However, the relationship generated should be different between primitives and regular classes. Primitives are converted to their own entity, dependent on their parent. Bona fide classes however, simply reference the class. Thus the generated cardinalities must also be different.