Appositive nominal groups
The closest post-modifying relationship is that between the head of a NG and an appositive unit, that is, a nominal unit that has the same referent. The relation between them and the head noun may be integrated (my friend the doctor . . .) or supplementive (my friend, the doctor I told you about . . .).
The following are some of the appositive relationships these may express:
definition: My friend the doctor.
naming: The explorer Marco Polo.
role: Neil Armstrong, the first man on the moon.
description: Chivalry, the dominant idea of the medieval ruling classes,
was symbolized by the Round Table, nature’s perfect shape.
particularization: The members voted for a change in the statutes: the election
of the chairman by popular vote.
