How does a container-managed relationship work? (EJB)

Question :How does a container-managed relationship work? (EJB)
Answer :An entity bean accesses related entity beans by means of the accessor
methods for its container-managed relationship fields, which are specified
by the cmr-field elements of its abstract persistence schema defined in the
deployment descriptor. Entity bean relationships are defined in terms of
the local interfaces of the related beans, and the view an entity bean
presents to its related beans is defined by its local home and local
interfaces. Thus, an entity bean can be the target of a relationship from
another entity bean only if it has a local interface.