docbook-xsl-ns software package provides stylesheets for processing DocBook 5 XML to various output formats, you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install docbook-xsl-ns
docbook-xsl-ns is installed in your system.
Make ensure the docbook-xsl-ns package were installed using the commands given below,
$ sudo dpkg-query -l | grep docbook-xsl-ns *
You will get with docbook-xsl-ns package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Text Processing |
| Package | docbook-xsl-ns |
| Version | 1.79.1+dfsg-2 |
| Description | stylesheets for processing DocBook 5 XML to various output formats |
| Sub Section | text |