gfl-indexer.xslt 20.5 KB
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<?xml version="1.0" encoding="utf-8"?>

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<!-- 

This script produces Solr XML documents.


Field 'fulltext_html'

This field  contains the HTML representation of the text of a TEI document (e. g. a Goethe letter).
The Goethe letters are composed of different parts, for example 'opener', 'closer', 'salute'.
All those parts are represented here as <div>'s with the corresponding CSS classes.
The frontend viewer must decide how to format those parts and present them to the user.

Also, the original TEI files contain mark-up for many in-text parts, like dates, names, underlined words, etc.
Most of these are also transformed to <div>'s with their own CSS classes.
Although the in-text parts are by nature inline elements, we use here <div>'s and not <span>'s.
The reason is that Solr seems to have problems when highlighting fields that contain <span>'s
by sometimes producing corrupt HTML.
By using <div>'s, we avoid this problem.
In the frontend, these <div>'s must be set to 'display: inline'.

Some other in-text parts are transformed to special HTML elements.
For example, superscripted text is marked as <sup>, because HTML offers the appropriate element.

The project is still continuing and new TEI files are being produced.
That's why there might be new elements in the future that cannot be handled yet in this script.
The text of such TEI elements is enclosed in HTML elements of class 'unknown-element'.
Furthermore, a warning message is generated that contains data of the first occurrence of such a new element.



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-->
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<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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   xpath-default-namespace="http://www.tei-c.org/ns/1.0" xmlns:gfl="http://sub.gfl.de"
   xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:saxon="http://saxon.sf.net/" exclude-result-prefixes="gfl saxon xs">

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   <xsl:output method="xml" indent="yes" saxon:suppress-indentation="div" />
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   <xsl:strip-space elements="*" />
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   <xsl:preserve-space elements="msIdentifier bibl p" />
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   <xsl:template match="/">
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      <xsl:apply-templates select="TEI" />
   </xsl:template>

   <xsl:template match="TEI">
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      <add>
         <doc>
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            <xsl:apply-templates select="teiHeader | text" />
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         </doc>
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         <xsl:apply-templates select="text" mode="page_splitting" />
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      </add>
   </xsl:template>
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   <xsl:template match="text()" mode="text_only">
      <xsl:variable name="currentText" select="replace(., '\s+', ' ')" />
      <xsl:choose>
         <xsl:when test="ends-with(., '-')">
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            <!-- These are cases where one word is divided between two lines. 
            The minus sign is removed here, the line break (<lb/>) is removed in its own template. -->
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            <xsl:value-of select="substring($currentText, 1, string-length($currentText)-1)" />
         </xsl:when>
         <xsl:when test="ends-with(., '&#0173;')">
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            <!-- A soft hyphen is a convention to mark a hyphen that belongs to the word or is a hyphen on its own.
            For now, it is just replaced by a minus sign. 
            Later, it might be useful to differentiate between word divisions and hyphens. -->
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            <xsl:value-of select="replace($currentText, '&#0173;', '-')" />
         </xsl:when>
         <xsl:otherwise>
            <xsl:value-of select="$currentText" />
         </xsl:otherwise>
      </xsl:choose>
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   </xsl:template>
   
   <!--###########   Header   #######################-->
   
   <xsl:template match="teiHeader">
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      <xsl:apply-templates select="fileDesc | profileDesc/textClass" />
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   </xsl:template>
   
   <xsl:template match="fileDesc">
      <xsl:apply-templates select="titleStmt/title" />
      <xsl:apply-templates select="titleStmt/title[@type='desc']/name" />
      <xsl:apply-templates select="titleStmt/title[@type='desc']/date[@type='orn']" />
      <xsl:apply-templates select="titleStmt/author/name" />
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      <xsl:apply-templates select="sourceDesc" />
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   </xsl:template>
   
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   <xsl:template match="profileDesc/textClass">
      <xsl:apply-templates select="keywords/term" />
   </xsl:template>
   
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   <xsl:template match="title[@type='short']">
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      <field name="short_title">
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         <xsl:apply-templates mode="text_only" />
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      </field>
   </xsl:template>

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   <xsl:template match="title[@type='desc']">
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      <field name="title">
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         <xsl:apply-templates mode="text_only" />
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      </field>
   </xsl:template>

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   <xsl:template match="title/name[@type='place' and @subtype='orn']">
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      <field name="origin_place">
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         <xsl:apply-templates mode="text_only" />
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      </field>
   </xsl:template>

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   <xsl:template match="title/name[@type='place' and @subtype='dtn']">
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      <field name="destination_place">
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         <xsl:apply-templates mode="text_only" />
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      </field>
   </xsl:template>

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   <xsl:template match="title/name[@type='person' and @subtype='rcp']">
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      <field name="recipient">
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         <xsl:apply-templates mode="text_only" />
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      </field>
   </xsl:template>

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   <xsl:template match="title/date[@type='orn']">
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      <field name="origin_date">
         <xsl:value-of select="@when" />
      </field>
   </xsl:template>

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   <xsl:template match="author/name[@type='person' and @subtype='aut']">
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      <field name="author">
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         <xsl:apply-templates mode="text_only" />
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      </field>
   </xsl:template>
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   <xsl:template match="sourceDesc">
      <field name="source_description">
         <xsl:apply-templates mode="text_only" />
      </field>
   </xsl:template>
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   <xsl:template match="textClass/keywords[@scheme='#gnd']/term">
      <field name="gnd_keyword">
         <xsl:apply-templates mode="text_only" />
      </field>
   </xsl:template>

   <xsl:template match="textClass/keywords[@scheme='free']/term">
      <field name="free_keyword">
         <xsl:apply-templates mode="text_only" />
      </field>
   </xsl:template>


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   <!--###################   text/body   ##########################-->

   <xsl:template match="text">
      <field name="id">
         <xsl:value-of select="@xml:id" />
      </field>
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      <field name="doctype">article</field>
      <field name="number_of_pages">
         <xsl:value-of select="count(//pb)" />
      </field>
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      <field name="fulltext">
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         <xsl:apply-templates select="body" mode="text_only" />
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      </field>
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      <field name="fulltext_html">
         <xsl:text disable-output-escaping="yes">&lt;![CDATA[</xsl:text>
            <div class="article">
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               <xsl:variable name="context" select="." />
               <xsl:for-each-group select="descendant::node()[not(node())]" group-starting-with="pb">
                  <xsl:if test="self::pb">
                     <div class="page">
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                        <xsl:call-template name="page-beginning-with-possible-link">
                           <xsl:with-param name="current-pb" select="." />
                        </xsl:call-template>
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                        <xsl:apply-templates select="$context/*" mode="page_splitting">
                           <xsl:with-param name="restricted-to" select="current-group()/ancestor-or-self::node()" tunnel="yes" />
                        </xsl:apply-templates>
                     </div>
                  </xsl:if>
               </xsl:for-each-group>
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            </div>
         <xsl:text disable-output-escaping="yes">]]&gt;</xsl:text>
      </field>
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      <xsl:apply-templates select=".//note[@type='com']" />
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   </xsl:template>
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   <xsl:template match="body | div" mode="text_only">
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      <xsl:apply-templates mode="text_only"/>
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   </xsl:template>

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   <xsl:template match="p | salute | signed | addrLine | dateline" mode="text_only">
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      <xsl:apply-templates mode="text_only" />
      <xsl:text> </xsl:text>
   </xsl:template>
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   <xsl:template match="note[@place='end' and not(@type='com')]" mode="text_only">
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      <xsl:text> </xsl:text>
      <xsl:apply-templates mode="text_only" />
   </xsl:template>

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   <xsl:template match="lb" mode="text_only">
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      <xsl:variable name="precedingText" select="preceding-sibling::text()[1]" />
      <xsl:choose>
         <xsl:when test="ends-with($precedingText, '-')">
            <!-- Cases where a word is divided between two lines -->
            <!-- no output -->
         </xsl:when>
         <xsl:when test="ends-with($precedingText, '&#0173;') and not(ends-with($precedingText, ' &#0173;'))">
            <!-- Cases where the hyphen belongs to the word (Anna-<lb/>Lena) -->
            <!-- no output -->
         </xsl:when>
         <xsl:otherwise>
            <xsl:text> </xsl:text>
         </xsl:otherwise>
      </xsl:choose>
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   </xsl:template>
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   <xsl:template match="pb" mode="text_only">
      <xsl:text> </xsl:text>
   </xsl:template>

   <xsl:template match="space" mode="text_only">
      <xsl:text> </xsl:text>
   </xsl:template>

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   <xsl:template match="note[@type='com']" mode="text_only">
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   </xsl:template>
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   <xsl:template match="note[@type='com']">
      <field name="note_comment">
         <xsl:apply-templates mode="text_only" />
      </field>
   </xsl:template>
   
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   <!-- %%%%%%%%%%%%% page splitting and HTML generating %%%%%%%%%%%%%%%%%%%%%%% -->
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   <xsl:template match="text" mode="page_splitting">
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      <xsl:variable name="context" select="." />
      <xsl:for-each-group select="descendant::node()[not(node())]" group-starting-with="pb">
         <xsl:if test="self::pb">
            <doc>
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               <xsl:variable name="pageNumber" select="count(preceding::pb) + 1" />
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               <field name="id">
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                  <xsl:value-of select="$context/@xml:id" />
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                  <xsl:text>_page</xsl:text>
                  <xsl:value-of select="$pageNumber" />
               </field>
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               <field name="article_id">
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                  <xsl:value-of select="$context/@xml:id" />
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               </field>
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               <field name="doctype">page</field>
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               <field name="page_number">
                  <xsl:value-of select="$pageNumber" />
               </field>
               <field name="html_page">
                  <xsl:text disable-output-escaping="yes">&lt;![CDATA[</xsl:text>
                  <div class="page">
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                     <xsl:call-template name="page-beginning-with-possible-link">
                        <xsl:with-param name="current-pb" select="." />
                     </xsl:call-template>
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                     <xsl:apply-templates select="$context/*" mode="page_splitting">
                        <xsl:with-param name="restricted-to" select="current-group()/ancestor-or-self::node()" tunnel="yes" />
                     </xsl:apply-templates>
                  </div>
                  <xsl:text disable-output-escaping="yes">]]&gt;</xsl:text>
               </field>
            </doc>
         </xsl:if>
      </xsl:for-each-group>
   </xsl:template>

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   <xsl:template name="page-beginning-with-possible-link">
      <xsl:param name="current-pb" />
      <div class="page-beginning">
         <xsl:variable name="facsId" select="substring($current-pb/@facs, 2, string-length($current-pb/@facs))" />
         <xsl:variable name="graphicUrl" select="id($facsId)/@url" />
         <xsl:variable name="graphicUrlWithoutJpg">
            <xsl:value-of select="if (ends-with($graphicUrl, '.jpg')) then substring($graphicUrl, 1, string-length($graphicUrl)-4) else $graphicUrl" />
         </xsl:variable>
         <xsl:choose>
            <xsl:when test="$current-pb/@n ne '' and $graphicUrlWithoutJpg">
               <a href="{concat('/', $graphicUrlWithoutJpg)}" target="_blank">
                  <xsl:value-of select="$current-pb/@n" />
               </a>
            </xsl:when>
            <xsl:when test="$current-pb/@n ne ''">
               <xsl:value-of select="$current-pb/@n" />
            </xsl:when>
            <xsl:otherwise>
               <xsl:text> </xsl:text>
            </xsl:otherwise>
         </xsl:choose>
      </div>
   </xsl:template>

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   <xsl:template match="pb" mode="page_splitting" />

   <xsl:template match="*" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <xsl:message>
            <xsl:text>Unknown element &lt;</xsl:text>
            <xsl:value-of select="local-name()" />
            <xsl:if test="@rendition">
               <xsl:text> rendition="</xsl:text>
               <xsl:value-of select="@rendition" />
               <xsl:text>"</xsl:text>
            </xsl:if>
            <xsl:if test="@type">
               <xsl:text> type="</xsl:text>
               <xsl:value-of select="@type" />
               <xsl:text>"</xsl:text>
            </xsl:if>
            <xsl:text>&gt; - first occurrence: </xsl:text>
         </xsl:message>
         <span class="unknown-element">
            <xsl:apply-templates mode="page_splitting" />
         </span>
      </xsl:if>
   </xsl:template>

   <xsl:template match="body | div | front" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <xsl:apply-templates mode="page_splitting" />
      </xsl:if>
   </xsl:template>

   <xsl:template match="p | opener | salute | seg | bibl | closer | signed | dateline | date 
   | label[not(@rendition)] | choice | abbr | expan | postscript" mode="page_splitting">
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      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="{local-name(.)}">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="text()" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
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         <xsl:variable name="currentText" select="replace(., '\s+', ' ')" />
         <xsl:choose>
            <xsl:when test="ends-with(., '&#0173;')">
               <xsl:value-of select="replace($currentText, '&#0173;', '-')" />
            </xsl:when>
            <xsl:otherwise>
               <xsl:value-of select="$currentText" />
            </xsl:otherwise>
         </xsl:choose>
      </xsl:if>
   </xsl:template>

   <xsl:template match="lb" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <br />
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      </xsl:if>
   </xsl:template>

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   <xsl:template match="space[@unit='lines']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <xsl:variable name="emptyLines" select="@quantity" />
         <xsl:choose>
            <xsl:when test="$emptyLines castable as xs:integer">
               <xsl:for-each select="1 to $emptyLines">
                  <br />
               </xsl:for-each>
            </xsl:when>
            <xsl:otherwise>
               <br />
            </xsl:otherwise>
         </xsl:choose>
      </xsl:if>
   </xsl:template>

   <xsl:template match="name[@type='place']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="place">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="name[@type='org']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="org">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="name[@type='person']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="person">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="name[@type='object']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="object">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="rs[@type='person']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="rs-person">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="rs[@type='place']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="rs-place">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="note[@type='com']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="note-comment">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="note[@type='footnote']" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="note-footnote">
            <xsl:apply-templates mode="page_splitting" />
         </div>
      </xsl:if>
   </xsl:template>

   <xsl:template match="note[not(@type)]" mode="page_splitting">
      <xsl:param name="restricted-to" tunnel="yes" />
      <xsl:if test="exists(. intersect $restricted-to)">
         <div class="note">
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         <div class="doubleunderline">
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   <xsl:template match="hi[@rendition='simple:italic']" mode="page_splitting">
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         <div class="italic">
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         </div>
      </xsl:if>
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   <xsl:template match="hi[@rendition='simple:letterspace']" mode="page_splitting">
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         <div class="letterspace">
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         </div>
      </xsl:if>
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   <xsl:template match="hi[@rendition='simple:right']" mode="page_splitting">
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</xsl:stylesheet>