docbook_4 from Documentation:Tools project
选择您的操作系统
添加软件源并手动安装
对于 openSUSE Tumbleweed，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/Documentation:Tools/openSUSE_Tumbleweed/Documentation:Tools.repo zypper refresh zypper install docbook_4