Using a List of Values (LOV)
You can define LOVs on view object attributes.
LOVs use view accessors as a data source:
For an attribute that is mapped to an entity object, you normally use the same underlying entity object view accessor that is used by the Key Exists validator for the underlying EO attribute. The entity object view accessor can be extended at the view object level to either change the UI Hints or change bind expressions.
You can define view object view accessors to be used for transient attributes that are not mapped to entity object attributes.