<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="callouts.extension">
<refmeta>
<refentrytitle>callouts.extension</refentrytitle>
<refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
</refmeta>
<refnamediv>
<refname>callouts.extension</refname>
<refpurpose>Enable the callout extension</refpurpose>
</refnamediv>

<refsynopsisdiv>
<src:fragment xml:id="callouts.extension.frag">
<xsl:param name="callouts.extension" select="1"/>
</src:fragment>
</refsynopsisdiv>

<refsection><info><title>Description</title></info>
<!-- DP. Note this is not used in the same manner as callout.graphics.extension -->
<para>The callouts extension processes <tag>areaset</tag>
elements in <tag>programlistingco</tag> and other text-based
callout elements.
</para>

</refsection>
</refentry>