deltarpm contains the difference between an old and a new version of an RPM package.
Delta RPM packages contain the difference between an old and a new version of an RPM package. Applying a delta RPM on an old RPM results in the complete new RPM. It is not necessary to have a copy of the old RPM, because a delta RPM can also work with an installed RPM.
acquired package info from repodata DB: repodata/27175616bcfdcd3043efabc81dd49522eeafc71d5102c7877b737d6e80b97422-primary.sqlite.bz2
This package provides help document for deltarpm.