The diagram becomes rather overcrowded due to the addition of all the {abstract} Person fields and references.
Furthermore, the description below mentions nothing about the Person class' references.
Thus, I maintain that the diagram needs to be of a higher level of abstraction, and the details of the person class be removed.

The diagram becomes rather overcrowded due to the addition of all the
{abstract} Personfields and references.Furthermore, the description below mentions nothing about the Person class' references.
Thus, I maintain that the diagram needs to be of a higher level of abstraction, and the details of the person class be removed.