= Data Model =
A good way to design a data model is to create an [https://de.wikipedia.org/wiki/Entity-Relationship-Modell Entity-Relationship Diagram]. It is recommended to do so in the scope of a Technical Design (see [[HowTo:Design_a_CustomizingOrganize_UBIK_Development#Requirement%20Supply%20Chain|Requirement Supply Chaintab=Requirement_Supply_Chain]]).
== Object-oriented and relational ==