what is controlfile section 28?

Giganews Newsgroups
Subject: what is controlfile section 28?
Posted by:  Ben (balv…@comcast.net)
Date: Wed, 18 Jul 2007 EntEd AIX5L

I've searched here and there and almost everywhere.
concepts guide didn't list them,
admin guide doesn't list them,
asktom doesn't list them,
can't find them here.

what are the differenct controlfile sections?
I've gotten a couple of 'expanded controlfile section 28' and I'm
tryingn to find out what is causing it.