Links can exist between instances of the same class, for example, between nodes in a ring network or authors of a book. Associations that have the same class at both ends are known as reflexive associations.
Definition: A reflexive association is an association between instances of the same class.
The individual author credits on a book (Authorships) appear in a certain sequence. Each credit may have a role (e.g., editor, compiled by, as told to). We can model this as in Figure 6.19.
Generally these reflexive associations are ...