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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>use.role.for.mediaobject</title><link rel="stylesheet" href="reference.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="../index.html" title="DocBook XSL Stylesheets: ReferenceDocumentation"><link rel="up" href="graphics.html" title="Graphics"><link rel="prev" href="preferred.mediaobject.role.html" title="preferred.mediaobject.role"><link rel="next" href="ignore.image.scaling.html" title="ignore.image.scaling"><link rel="copyright" href="copyright.html" title="License"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">use.role.for.mediaobject</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="preferred.mediaobject.role.html">Prev</a></td><th width="60%" align="center">Graphics</th><td width="20%" align="right"><a accesskey="n" href="ignore.image.scaling.html">Next</a></td></tr></table><hr></div><div class="refentry" title="use.role.for.mediaobject"><a name="use.role.for.mediaobject"></a><div class="titlepage"></div>
<div class="refnamediv"><h2><span class="refentrytitle">use.role.for.mediaobject</span></h2><p>
use.role.for.mediaobject
— Use <code class="sgmltag-attribute">role</code> attribute
value for selecting which of several objects within a mediaobject to use.
</p></div>
<div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2>
<a name="use.role.for.mediaobject.frag"></a><pre class="programlisting">
<xsl:param name="use.role.for.mediaobject" select="1"></xsl:param>
</pre>
</div>
<div class="refsection" title="Description"><a name="id1396382"></a><h2>Description</h2>
<p>If non-zero, the <code class="sgmltag-attribute">role</code> attribute on
<a href="http://docbook.org/tdg5/en/html/imageobject.html"><code class="sgmltag-element">imageobject</code></a>s or other objects within a <a href="http://docbook.org/tdg5/en/html/mediaobject.html"><code class="sgmltag-element">mediaobject</code></a> container will be used to select which object will be
used.
</p>
<p>
The order of selection when then parameter is non-zero is:
</p>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<p>If the stylesheet parameter <a href="../html/preferred.mediaobject.role.html"><em class="parameter"><code>preferred.mediaobject.role</code></em></a> has a value, then the object whose role equals that value is selected.</p>
</li><li class="listitem">
<p>Else if an object's role attribute has a value of
<code class="literal">html</code> for HTML processing or
<code class="literal">fo</code> for FO output, then the first
of such objects is selected.
</p>
</li><li class="listitem">
<p>Else the first suitable object is selected.</p>
</li></ol></div>
<p>
If the value of
<a href="../html/use.role.for.mediaobject.html"><em class="parameter"><code>use.role.for.mediaobject</code></em></a>
is zero, then role attributes are not considered
and the first suitable object
with or without a role value is used.
</p>
</div>
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