对于 openSUSE Leap 15.6，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/Documentation:Containers/openSUSE_Leap_15.6/Documentation:Containers.repo
zypper refresh
zypper install docbook_5
对于 openSUSE Leap 15.5，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/Documentation:Containers/openSUSE_Leap_15.5/Documentation:Containers.repo
zypper refresh
zypper install docbook_5
对于 openSUSE Leap 15.4，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/Documentation:Containers/openSUSE_Leap_15.4/Documentation:Containers.repo
zypper refresh
zypper install docbook_5