e</li>
<li>description</li>
<li>left object protected: the left object of a relation of this type may not be deleted as long as the relation exists.</li>
<li>right object protected: the right object of a relation of this type may not be deleted as long as the relation exists.</li>
<li>clone on right copy: If the right object of a relation of this type is copied, the relation will also be copied if this field is true.</li>
<li>clone on left copy: If the left object of a relation of this type is copied, the r