A lightweight question for whoever knows the answer (useful in debian/ubuntu for automatically adding missing dependencies)…
zypper automatically adds missing dependencies if they are available within the installed repositories and reports missing dependencies if they are not. Sometimes it is simply a matter of installing another repository; very occasionally there is no resolution of the missing dependency. zypper normally offers you the chance to proceed with the installation notwithstanding the missing dependency. In other words, zypper is more helpful than apt and treats you as an intelligent user.
Thanks. That works for me.