DOCBOOK: what kind of element is a set of exercises?

[Robert P. J. Day]

  i'm still grappling with how to categorize a set of exercises
that would be found at the end of a section.

  i'd like the set to have a title, "Exercises", but i don't want
it to be a <section> since that doesn't seem appropriate, and i
don't want the exercises to show up in the TOC.

  currently, i'm using a <bridgehead> to throw a title in front
of an ordered list.  is there a better way?

rday