Package deltarpm

Create deltas between rpms

http://gitorious.org/deltarpm/deltarpm

A deltarpm contains the difference between an old
and a new version of a rpm, which makes it possible
to recreate the new rpm from the deltarpm and the old
one. You don't have to have a copy of the old rpm,
deltarpms can also work with installed rpms.

System Administration (Section 8)
applydeltarpm
applydeltarpm applies a binary delta to either an old rpm or to on-disk data to re-create a new rpm. The old rpm can be specified with the -r option, if no rpm...
combinedeltarpm
combinedeltarpm creates a new deltarpm from multiple old ones. Applying the rsulting deltarpm has the same effect as applying each of the old ones in the...
makedeltarpm
makedeltarpm creates a deltarpm from two rpms. The deltarpm can later be used to recreate the new rpm from either filesystem data or the old rpm. Use the -v...