lfs-book/stylesheets/lfs-xsl/docbook-xsl-1.78.1/params/use.extensions.xml

<refentry xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xmlns:xi="http://www.w3.org/2001/XInclude"
          xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
          xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
          version="5.0" xml:id="use.extensions">
<refmeta>
<refentrytitle>use.extensions</refentrytitle>
<refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
</refmeta>
<refnamediv>
<refname>use.extensions</refname>
<refpurpose>Enable extensions</refpurpose>
</refnamediv>

<refsynopsisdiv>
<src:fragment xml:id="use.extensions.frag">
<xsl:param name="use.extensions" select="0"/>
</src:fragment>
</refsynopsisdiv>

<refsection><info><title>Description</title></info>

<para>If non-zero, extensions may be used. Each extension is
further controlled by its own parameter. But if
<parameter>use.extensions</parameter> is zero, no extensions will
be used.
</para>

</refsection>
</refentry>