A unidirectional non-functional association is either one-to-many or many-to-many. In both cases such an association is represented with the help of a multi-valued reference property.
In this chapter, we show
how to derive a Java Entity class model from an OO class model with multi-valued reference properties representing unidirectional non-functional associations,
how to code the Java Entity class model in the form of entity classes (implementing model classes),
how to write the view and controller code based on the model code.