| 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="refentry.source.fallback.profile">
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| 7 | <refmeta>
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| 8 | <refentrytitle>refentry.source.fallback.profile</refentrytitle>
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| 9 | <refmiscinfo class="other" otherclass="datatype">string</refmiscinfo>
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| 10 | </refmeta>
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| 11 | <refnamediv>
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| 12 | <refname>refentry.source.fallback.profile</refname>
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| 13 | <refpurpose>Specifies profile of "fallback" for refentry "source" data</refpurpose>
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| 14 | </refnamediv>
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| 15 |
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| 16 | <refsynopsisdiv>
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| 17 | <src:fragment xml:id="refentry.source.fallback.profile.frag">
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| 18 | <xsl:param name="refentry.source.fallback.profile">
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| 19 | refmeta/refmiscinfo[not(@class = 'date')][1]/node()</xsl:param>
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| 20 | </src:fragment>
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| 21 | </refsynopsisdiv>
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| 22 |
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| 23 | <refsection><info><title>Description</title></info>
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| 24 |
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| 25 | <para>The value of
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| 26 | <parameter>refentry.source.fallback.profile</parameter> is a string
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| 27 | representing an XPath expression. It is evaluated at run-time and used
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| 28 | only if no "source" data can be found by other means (that is, either
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| 29 | using the <tag>refentry</tag> metadata-gathering logic "hard coded" in
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| 30 | the stylesheets, or the value of the
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| 31 | <parameter>refentry.source.name.profile</parameter> and
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| 32 | <parameter>refentry.version.profile</parameter> parameters, if those
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| 33 | are enabled).</para>
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| 34 |
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| 35 | <important>
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| 36 | <para>Depending on which XSLT engine you run, either the EXSLT
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| 37 | <function>dyn:evaluate</function> extension function (for xsltproc or
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| 38 | Xalan) or <function>saxon:evaluate</function> extension function (for
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| 39 | Saxon) are used to dynamically evaluate the value of
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| 40 | <parameter>refentry.source.fallback.profile</parameter> at
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| 41 | run-time. If you don't use xsltproc, Saxon, Xalan -- or some other
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| 42 | XSLT engine that supports <function>dyn:evaluate</function> -- you
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| 43 | must manually disable fallback processing by setting an empty value
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| 44 | for the <parameter>refentry.source.fallback.profile</parameter>
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| 45 | parameter.</para>
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| 46 | </important>
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| 47 |
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| 48 | </refsection>
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| 49 | </refentry>
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