Model Reference Properties

Reference properties as unidirectional associations

A reference property, like the one in the example below, can be modeled in a UML class diagram. In the diagram, the reference property will appear in the form of an association end owned by its domain class. This is visualized with the help of a small filled circle also called a dot. To perform this visualization, we must connect the domain class and the range class of the reference property with an association line, placing an ownership dot at the end of this line at the range class side and annotating this association end with the property name and a multiplicity symbol. In this way, we get a unidirectional ...