Check if a repository is being used?

[Bruno Wolff III]

On Fri, Jul 06, 2007 at 09:12:02 -0500,
  Stanczak Group <justin at stanczakgroup.com> wrote:
> If you have a couple different repositories and you'd like to remove 
> one, is there a way to see if there are any packages on your system that 
> are from the repository?

The low level way to do this is edit the files in /etc/yum.repos.d .
There is an enabled flag that should be 1 if the repo is to be used and 0
if it isn't.