lfs-book-zh_CN/stylesheets/lfs-xsl/docbook-xsl-1.78.1/params/graphic.default.extension.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="graphic.default.extension">
<refmeta>
<refentrytitle>graphic.default.extension</refentrytitle>
<refmiscinfo class="other" otherclass="datatype">string</refmiscinfo>
</refmeta>
<refnamediv>
<refname>graphic.default.extension</refname>
<refpurpose>Default extension for graphic filenames</refpurpose>
</refnamediv>

<refsynopsisdiv>
<src:fragment xml:id="graphic.default.extension.frag"><xsl:param name="graphic.default.extension"/></src:fragment>
</refsynopsisdiv>

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

<para>If a <tag>graphic</tag> or <tag>mediaobject</tag>
includes a reference to a filename that does not include an extension,
and the <tag class="attribute">format</tag> attribute is
<emphasis>unspecified</emphasis>, the default extension will be used.
</para>

</refsection>
</refentry>