docbook-xsl from openSUSE:Factory:Staging:G project
Selecione seu sistema operacional
Adicionar repositório e instalar manualmente
Para standard execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Factory:Staging:G/standard/openSUSE:Factory:Staging:G.repo zypper refresh zypper install docbook-xsl