[15c7d39] | 1 | <refentry xmlns="http://docbook.org/ns/docbook"
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| 2 | xmlns:xlink="http://www.w3.org/1999/xlink"
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| 3 | xmlns:xi="http://www.w3.org/2001/XInclude"
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| 4 | xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
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| 5 | xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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| 6 | version="5.0" xml:id="use.role.for.mediaobject">
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| 7 | <refmeta>
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| 8 | <refentrytitle>use.role.for.mediaobject</refentrytitle>
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| 9 | <refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
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| 10 | </refmeta>
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| 11 | <refnamediv>
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| 12 | <refname>use.role.for.mediaobject</refname>
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| 13 | <refpurpose>Use <tag class="attribute">role</tag> attribute
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| 14 | value for selecting which of several objects within a mediaobject to use.
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| 15 | </refpurpose>
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| 16 | </refnamediv>
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| 17 |
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| 18 | <refsynopsisdiv>
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| 19 | <src:fragment xml:id="use.role.for.mediaobject.frag">
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| 20 | <xsl:param name="use.role.for.mediaobject" select="1"/>
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| 21 | </src:fragment>
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| 22 | </refsynopsisdiv>
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| 23 |
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| 24 | <refsection><info><title>Description</title></info>
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| 25 |
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| 26 | <para>If non-zero, the <tag class="attribute">role</tag> attribute on
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| 27 | <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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| 28 | used.
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| 29 | </para>
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| 30 | <para>
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| 31 | The order of selection when then parameter is non-zero is:
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| 32 | </para>
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| 33 | <orderedlist>
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| 34 | <listitem>
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| 35 | <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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| 36 | </listitem>
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| 37 | <listitem>
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| 38 | <para>Else if an object's role attribute has a value of
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| 39 | <literal>html</literal> for HTML processing or
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| 40 | <literal>fo</literal> for FO output, then the first
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| 41 | of such objects is selected.
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| 42 | </para>
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| 43 | </listitem>
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| 44 | <listitem>
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| 45 | <para>Else the first suitable object is selected.</para>
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| 46 | </listitem>
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| 47 | </orderedlist>
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| 48 | <para>
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| 49 | If the value of
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| 50 | <parameter>use.role.for.mediaobject</parameter>
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| 51 | is zero, then role attributes are not considered
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| 52 | and the first suitable object
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| 53 | with or without a role value is used.
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| 54 | </para>
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| 55 | </refsection>
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| 56 | </refentry>
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