Upvote:2
As the flights within Schengen and within Germany will depart from the same part of the German airports with the same processes to join them, you can take the minimum connection time for Domestic as same for Within Schengen.
The only difference may be if you come from outside the Schengen area, have luggage and your next airport does not have a customs department, which might make you spend extra time to have your luggage through customs.