RAW and JPEG cataloging in Lightroom?

KatManDEW wrote:

I use Lightroom to catalog and develop my RAW files, and then create JPEG's for typical uses. But I don't end up with the JPEG's in my Lightroom catalog, and I think that would be helpful finding the ones I want, the way I do with RAW files.

Is there a way to catalog both my RAW and JEPG files with Lightroom?