yum remembering repo of origin

[Jonas Karlsson]

I was thinking about if there is a feature in Yum (or rpm) that lets you 
see from where a package originated. When a package is installed it only 
shows as repository installed, correct? Is there a possibility that this 
feature could be added to the database handling in yum? It would be a 
usefull thing when deciding to uninstall all from a certain repo for 
what ever reson...

//Jonas