primary refinement

So i'm looking at primary.xml.gz and I'm thinking of useful ways of
refining the data included a bit so it's a bit lighter to read in.

I was thinking what do y'all think of moving the following fields to a
different xml file in the repository?

summary
description
packager
license
vendor
group
url (url for the package, not url location of the rpm)
buildhost


my thinking is that it would decrease the data in primary.xml.gz and
make actions that are most common, 'update, install, etc' a fair bit
faster simply by not having to go through all these nodes.

every package has most of these entries, they're fairly text heavy and
not useful for solving deps or finding out which packages are available.

thoughts?

-sv