Install docbook-xsl by entering the following commands in the terminal:
sudo apt update sudo apt install docbook-xsl
Description:
stylesheets for processing DocBook XML to various output formats
These are modular XSL stylesheets for processing documents composed with the DocBook XML DTD and its derivatives ("Simplified" DocBook XML, JRefEntry DTD, etc.). . The stylesheets provide XSLT transformations for (X)HTML, WordML, HTML Help, JavaHelp, Man page (nroff), Website, Eclipse Platform Help file and XSL Formatting Object (XSL-FO) output. The latter can be further processed to a number of print formats using FOP or TeX-based tools. . The stylesheets are modular in the sense that you can extend and, to some extent, customize them. The documentation is included in a separate package.
Homepage: http://wiki.docbook.org/DocBookXslStylesheets
Version: 1.79.1+dfsg-2
Section: universe/text