3ca70210_ned_versus_Derived_Data_Models__Native_Approach
[External Approach] Defined in a relational manner with object-oriented facade; relational schemas don't translate perfectly to objects. [Native Approach] 
Defined in an object-oriented manner; the patterns for storing object-oriented data in relational databases are very well defined and handled by the ORM framework and JPA provider.
11. Deciding between Defined versus Derived Data Models
Native Approach