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<refentry id="preferred.mediaobject.role">
<refmeta>
<refentrytitle>preferred.mediaobject.role</refentrytitle>
</refmeta>
<refnamediv>
<refname>preferred.mediaobject.role</refname>
<refpurpose>Select which mediaobject to use based on
this value of an object's <sgmltag class="attribute">role</sgmltag> attribute.
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<src:fragment id='preferred.mediaobject.role.frag'>
<xsl:param name="preferred.mediaobject.role"></xsl:param>
</src:fragment>
</refsynopsisdiv>
<refsect1><title>Description</title>
<para>A mediaobject may contain several objects such as imageobjects.
If the parameter <parameter>use.role.for.mediaobject</parameter>
is non-zero, then the <sgmltag class="attribute">role</sgmltag> attribute on
<sgmltag>imageobject</sgmltag>s and other objects within a <sgmltag>mediaobject</sgmltag> container will be used to select which object will be
used. If one of the objects has a role value that matches the
preferred.mediaobject.role parameter, then it has first
priority for selection. If more than one has such a
role value, the first one is used.
</para>
<para>
See the <parameter>use.role.for.mediaobject</parameter> parameter
for the sequence of selection.</para>
</refsect1>
</refentry>
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