yum erase the best way to do reverse dependency checking?

[Bruno Wolff III]

On Sun, Feb 20, 2011 at 12:04:51 -0600,
  Richard Shaw <hobbes1069 at gmail.com> wrote:
> I was googling for a way to figure out a dependency chain for a
> package I'm trying to flush out a spec file for and build. There
> doesn't seem to be a non-destructive equivalent to "yum erase
> <package>" to see if I need to explicitly include a package/program.
> 
> Anyone have a solution they like?

You should be able to use repoquery to do what you want.