Install docbook-slides by entering the following commands in the terminal:
sudo apt update sudo apt install docbook-slides
Description:
XML Slides DTD and XSL Stylesheets
A docbook-derived XML DTD for building presentation slides. This package includes the xsl stylesheets for this DTD. This version can be customized with the Simplified DocBook XML DTD or with the full DocBook XML DTD.
Homepage: http://docbook.sourceforge.net
Version: 3.4.0-5
Section: universe/text