56 lines
1.9 KiB
XML
56 lines
1.9 KiB
XML
<refentry xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
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xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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version="5.0" xml:id="use.role.for.mediaobject">
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<refmeta>
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<refentrytitle>use.role.for.mediaobject</refentrytitle>
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<refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>use.role.for.mediaobject</refname>
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<refpurpose>Use <tag class="attribute">role</tag> attribute
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value for selecting which of several objects within a mediaobject to use.
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<src:fragment xml:id="use.role.for.mediaobject.frag">
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<xsl:param name="use.role.for.mediaobject" select="1"/>
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</src:fragment>
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</refsynopsisdiv>
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<refsection><info><title>Description</title></info>
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<para>If non-zero, the <tag class="attribute">role</tag> attribute on
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<tag>imageobject</tag>s or other objects within a <tag>mediaobject</tag> container will be used to select which object will be
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used.
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</para>
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<para>
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The order of selection when then parameter is non-zero is:
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</para>
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<orderedlist>
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<listitem>
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<para>If the stylesheet parameter <parameter>preferred.mediaobject.role</parameter> has a value, then the object whose role equals that value is selected.</para>
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</listitem>
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<listitem>
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<para>Else if an object's role attribute has a value of
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<literal>html</literal> for HTML processing or
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<literal>fo</literal> for FO output, then the first
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of such objects is selected.
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</para>
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</listitem>
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<listitem>
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<para>Else the first suitable object is selected.</para>
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</listitem>
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</orderedlist>
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<para>
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If the value of
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<parameter>use.role.for.mediaobject</parameter>
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is zero, then role attributes are not considered
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and the first suitable object
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with or without a role value is used.
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</para>
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</refsection>
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</refentry>
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