Thorsten Leemhuis wrote:
Comps.xml is afaics mainly used in anaconda (and thus indirectly in
tools like pungi that rely on anaconda) and yum (if you know what to do)
these days; PackageKit afaics doesn't use it much (or does it use
comps.xml at all? Will that change?); it just lists everything it finds
afaics (correct me if I'm wrong, I'm not using PackageKit much and just
use yum directly).
PackageKit does use it via the yum backend.
http://blogs.gnome.org/hughsie/2008/09/19/packagekit-collections/
Rahul