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/e802af2051d51f58c8fb57056c7b77a907c36b8f997e1a71f828dbf9d916677d-primary.sqlite.bz2
This package provides help document for deltarpm.