Install docbook-website by entering the following commands in the terminal:
sudo apt update sudo apt install docbook-website
Description:
XML Website DTD and XSL Stylesheets
A docbook-derived XML DTD for building web sites. This package includes the xsl stylesheets for this DTD. This version is a customization of the DocBook XML V4.2 DTD. . Author: Norman Walsh
Homepage: http://sourceforge.net/projects/docbook/
Version: 2.5.0.0-8
Section: universe/text