xen from Virtualization:openSUSE13.1 project
Select Your Operating System
Add repository and install manually
For openSUSE 13.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization:openSUSE13.1/openSUSE_13.1/Virtualization:openSUSE13.1.repo zypper refresh zypper install xen