对于 openSUSE Factory，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/Publishing/openSUSE_Factory/Publishing.repo
zypper refresh
zypper install w3c-markup-validator
对于 16.0，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/Publishing/16.0/Publishing.repo
zypper refresh
zypper install w3c-markup-validator
对于 15.6，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/Publishing/15.6/Publishing.repo
zypper refresh
zypper install w3c-markup-validator