<part xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude" version="5.0" xml:id='part-command-ref'> <title>Command Reference</title> <partintro> <para>This section lists commands and options that you can use when you work with Nix.</para> </partintro> <xi:include href="opt-common.xml" /> <xi:include href="env-common.xml" /> <xi:include href="main-commands.xml" /> <xi:include href="utilities.xml" /> <xi:include href="files.xml" /> </part>