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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>preferred.mediaobject.role</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="make.graphic.viewport.html" title="make.graphic.viewport"><link rel="next" href="use.role.for.mediaobject.html" title="use.role.for.mediaobject"><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">preferred.mediaobject.role</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="make.graphic.viewport.html">Prev</a></td><th width="60%" align="center">Graphics</th><td width="20%" align="right"><a accesskey="n" href="use.role.for.mediaobject.html">Next</a></td></tr></table><hr></div><div class="refentry" title="preferred.mediaobject.role"><a name="preferred.mediaobject.role"></a><div class="titlepage"></div>
<div class="refnamediv"><h2><span class="refentrytitle">preferred.mediaobject.role</span></h2><p>
preferred.mediaobject.role
— Select which mediaobject to use based on
this value of an object's <code class="sgmltag-attribute">role</code> attribute.
</p></div>
<div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2>
<a name="preferred.mediaobject.role.frag"></a><pre class="programlisting">
<xsl:param name="preferred.mediaobject.role"></xsl:param>
</pre>
</div>
<div class="refsection" title="Description"><a name="id1396284"></a><h2>Description</h2>
<p>A mediaobject may contain several objects such as imageobjects.
If the parameter <a href="../html/use.role.for.mediaobject.html"><em class="parameter"><code>use.role.for.mediaobject</code></em></a> is
non-zero, then the <code class="literal">role</code> attribute on
<a href="http://docbook.org/tdg5/en/html/imageobject.html"><code class="sgmltag-element">imageobject</code></a>s and 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. If one of the objects has a role value that matches the
<a href="../html/preferred.mediaobject.role.html"><em class="parameter"><code>preferred.mediaobject.role</code></em></a> parameter, then it
has first priority for selection. If more than one has such a role
value, the first one is used.
</p>
<p>
See the <a href="../html/use.role.for.mediaobject.html"><em class="parameter"><code>use.role.for.mediaobject</code></em></a> parameter
for the sequence of selection.</p>
</div>
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