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-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
-          xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-          version="5.0" xml:id="make.index.markup">
-<refmeta>
-<refentrytitle>make.index.markup</refentrytitle>
-<refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
-</refmeta>
-<refnamediv>
-<refname>make.index.markup</refname>
-<refpurpose>Generate XML index markup in the index?</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<src:fragment xml:id="make.index.markup.frag">
-<xsl:param name="make.index.markup" select="0"/>
-</src:fragment>
-</refsynopsisdiv>
-
-<refsection><info><title>Description</title></info>
-
-<para>This parameter enables a very neat trick for getting properly
-merged, collated back-of-the-book indexes. G. Ken Holman suggested
-this trick at Extreme Markup Languages 2002 and I'm indebted to him
-for it.</para>
-
-<para>Jeni Tennison's excellent code in
-<filename>autoidx.xsl</filename> does a great job of merging and
-sorting <tag>indexterm</tag>s in the document and building a
-back-of-the-book index. However, there's one thing that it cannot
-reasonably be expected to do: merge page numbers into ranges. (I would
-not have thought that it could collate and suppress duplicate page
-numbers, but in fact it appears to manage that task somehow.)</para>
-
-<para>Ken's trick is to produce a document in which the index at the
-back of the book is <quote>displayed</quote> in XML. Because the index
-is generated by the FO processor, all of the page numbers have been resolved.
-It's a bit hard to explain, but what it boils down to is that instead of having
-an index at the back of the book that looks like this:</para>
-
-<blockquote>
-<formalpara><info><title>A</title></info>
-<para>ap1, 1, 2, 3</para>
-</formalpara>
-</blockquote>
-
-<para>you get one that looks like this:</para>
-
-<blockquote>
-<programlisting>&lt;indexdiv&gt;A&lt;/indexdiv&gt;
-&lt;indexentry&gt;
-&lt;primaryie&gt;ap1&lt;/primaryie&gt;,
-&lt;phrase role="pageno"&gt;1&lt;/phrase&gt;,
-&lt;phrase role="pageno"&gt;2&lt;/phrase&gt;,
-&lt;phrase role="pageno"&gt;3&lt;/phrase&gt;
-&lt;/indexentry&gt;</programlisting>
-</blockquote>
-
-<para>After building a PDF file with this sort of odd-looking index, you can
-extract the text from the PDF file and the result is a proper index expressed in
-XML.</para>
-
-<para>Now you have data that's amenable to processing and a simple Perl script
-(such as <filename>fo/pdf2index</filename>) can
-merge page ranges and generate a proper index.</para>
-
-<para>Finally, reformat your original document using this literal index instead of
-an automatically generated one and <quote>bingo</quote>!</para>
-
-</refsection>
-</refentry>