[CentOS] packages in "base" that are not in "nobase"

Tue Oct 23 15:46:46 UTC 2007
Johnn Tan <linuxweb at gmail.com>

Is there a way to list the packages that are in a "base" 
install, but that are not in a "nobase" (core) install?

I did a nobase install, then ran "yum groupinstall Base", 
but this just lists everything in base, including the core 
packages.

Mainly, I'm just looking to audit the packages, and add only 
necessary ones back to a nobase install.

So far, I've come up with sendmail, man, logwatch, 
logrotate, vixie-cron.

johnn