lfs-book/stylesheets/lfs-xsl/docbook-xsl-snapshot/fo/xref.xsl

<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:fo="http://www.w3.org/1999/XSL/Format"
                xmlns:exsl="http://exslt.org/common"
                xmlns:xlink='http://www.w3.org/1999/xlink'
                exclude-result-prefixes="exsl"
                version='1.0'>

<!-- ********************************************************************
     $Id$
     ********************************************************************

     This file is part of the XSL DocBook Stylesheet distribution.
     See ../README or http://docbook.sf.net/release/xsl/current/ for
     copyright and other information.

     ******************************************************************** -->

<!-- Use internal variable for olink xlink role for consistency -->
<xsl:variable 
      name="xolink.role">http://docbook.org/xlink/role/olink</xsl:variable>

<!-- ==================================================================== -->

<xsl:template match="anchor">
  <xsl:variable name="id">
    <xsl:call-template name="object.id"/>
  </xsl:variable>
  <fo:inline id="{$id}"/>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template match="xref" name="xref">
  <xsl:param name="xhref" select="@xlink:href"/>
  <!-- is the @xlink:href a local idref link? -->
  <xsl:param name="xlink.idref">
    <xsl:if test="starts-with($xhref,'#')
                  and (not(contains($xhref,'&#40;'))
                  or starts-with($xhref, '#xpointer&#40;id&#40;'))">
      <xsl:call-template name="xpointer.idref">
        <xsl:with-param name="xpointer" select="$xhref"/>
      </xsl:call-template>
   </xsl:if>
  </xsl:param>
  <xsl:param name="xlink.targets" select="key('id',$xlink.idref)"/>
  <xsl:param name="linkend.targets" select="key('id',@linkend)"/>
  <xsl:param name="target" select="($xlink.targets | $linkend.targets)[1]"/>
  <xsl:param name="refelem" select="local-name($target)"/>

  <xsl:variable name="xrefstyle">
    <xsl:choose>
      <xsl:when test="@role and not(@xrefstyle) 
                      and $use.role.as.xrefstyle != 0">
        <xsl:value-of select="@role"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="@xrefstyle"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:variable name="content">
    <fo:inline xsl:use-attribute-sets="xref.properties">
      <xsl:choose>
        <xsl:when test="@endterm">
          <xsl:variable name="etargets" select="key('id',@endterm)"/>
          <xsl:variable name="etarget" select="$etargets[1]"/>
          <xsl:choose>
            <xsl:when test="count($etarget) = 0">
              <xsl:message>
                <xsl:value-of select="count($etargets)"/>
                <xsl:text>Endterm points to nonexistent ID: </xsl:text>
                <xsl:value-of select="@endterm"/>
              </xsl:message>
              <xsl:text>???</xsl:text>
            </xsl:when>
            <xsl:otherwise>
              <xsl:apply-templates select="$etarget" mode="endterm"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:when>
  
        <xsl:when test="$target/@xreflabel">
          <xsl:call-template name="xref.xreflabel">
            <xsl:with-param name="target" select="$target"/>
          </xsl:call-template>
        </xsl:when>
  
        <xsl:when test="$target">
          <xsl:if test="not(parent::citation)">
            <xsl:apply-templates select="$target" mode="xref-to-prefix"/>
          </xsl:if>
  
          <xsl:apply-templates select="$target" mode="xref-to">
            <xsl:with-param name="referrer" select="."/>
            <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
          </xsl:apply-templates>
  
          <xsl:if test="not(parent::citation)">
            <xsl:apply-templates select="$target" mode="xref-to-suffix"/>
          </xsl:if>
        </xsl:when>
        <xsl:otherwise>
          <xsl:message>
            <xsl:text>ERROR: xref linking to </xsl:text>
            <xsl:value-of select="@linkend|@xlink:href"/>
            <xsl:text> has no generated link text.</xsl:text>
          </xsl:message>
          <xsl:text>???</xsl:text>
        </xsl:otherwise>
      </xsl:choose>
    </fo:inline>
  </xsl:variable>

  <!-- Convert it into an active link -->
  <xsl:call-template name="simple.xlink">
    <xsl:with-param name="content" select="$content"/>
  </xsl:call-template>

  <!-- Add standard page reference? -->
  <xsl:choose>
    <xsl:when test="not($target)">
      <!-- page numbers only for local targets -->
    </xsl:when>
    <xsl:when test="starts-with(normalize-space($xrefstyle), 'select:') 
                  and contains($xrefstyle, 'nopage')">
      <!-- negative xrefstyle in instance turns it off -->
    </xsl:when>
    <!-- positive xrefstyle already handles it -->
    <xsl:when test="not(starts-with(normalize-space($xrefstyle), 'select:') 
                  and (contains($xrefstyle, 'page')
                       or contains($xrefstyle, 'Page')))
                  and ( $insert.xref.page.number = 'yes' 
                     or $insert.xref.page.number = '1')
                  or local-name($target) = 'para'">
      <xsl:apply-templates select="$target" mode="page.citation">
        <xsl:with-param name="id" select="$target/@id|$target/@xml:id"/>
      </xsl:apply-templates>
    </xsl:when>
  </xsl:choose>
</xsl:template>

<!-- ==================================================================== -->

<!-- Handled largely like an xref -->
<!-- To be done: add support for begin, end, and units attributes -->
<xsl:template match="biblioref" name="biblioref">
  <xsl:variable name="targets" select="key('id',@linkend)"/>
  <xsl:variable name="target" select="$targets[1]"/>
  <xsl:variable name="refelem" select="local-name($target)"/>

  <xsl:call-template name="check.id.unique">
    <xsl:with-param name="linkend" select="@linkend"/>
  </xsl:call-template>

  <xsl:choose>
    <xsl:when test="$refelem=''">
      <xsl:message>
        <xsl:text>XRef to nonexistent id: </xsl:text>
        <xsl:value-of select="@linkend"/>
      </xsl:message>
      <xsl:text>???</xsl:text>
    </xsl:when>

    <xsl:when test="@endterm">
      <fo:basic-link internal-destination="{@linkend}"
                     xsl:use-attribute-sets="xref.properties">
        <xsl:variable name="etargets" select="key('id',@endterm)"/>
        <xsl:variable name="etarget" select="$etargets[1]"/>
        <xsl:choose>
          <xsl:when test="count($etarget) = 0">
            <xsl:message>
              <xsl:value-of select="count($etargets)"/>
              <xsl:text>Endterm points to nonexistent ID: </xsl:text>
              <xsl:value-of select="@endterm"/>
            </xsl:message>
            <xsl:text>???</xsl:text>
          </xsl:when>
          <xsl:otherwise>
            <xsl:apply-templates select="$etarget" mode="endterm"/>
          </xsl:otherwise>
        </xsl:choose>
      </fo:basic-link>
    </xsl:when>

    <xsl:when test="$target/@xreflabel">
      <fo:basic-link internal-destination="{@linkend}"
                     xsl:use-attribute-sets="xref.properties">
        <xsl:call-template name="xref.xreflabel">
          <xsl:with-param name="target" select="$target"/>
        </xsl:call-template>
      </fo:basic-link>
    </xsl:when>

    <xsl:otherwise>
      <xsl:if test="not(parent::citation)">
        <xsl:apply-templates select="$target" mode="xref-to-prefix"/>
      </xsl:if>

      <fo:basic-link internal-destination="{@linkend}"
                     xsl:use-attribute-sets="xref.properties">
        <xsl:apply-templates select="$target" mode="xref-to">
          <xsl:with-param name="referrer" select="."/>
          <xsl:with-param name="xrefstyle">
            <xsl:choose>
              <xsl:when test="@role and not(@xrefstyle) and $use.role.as.xrefstyle != 0">
                <xsl:value-of select="@role"/>
              </xsl:when>
              <xsl:otherwise>
                <xsl:value-of select="@xrefstyle"/>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:with-param>
        </xsl:apply-templates>
      </fo:basic-link>

      <xsl:if test="not(parent::citation)">
        <xsl:apply-templates select="$target" mode="xref-to-suffix"/>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<!-- ==================================================================== -->

<xsl:template match="*" mode="endterm">
  <!-- Process the children of the endterm element -->
  <xsl:variable name="endterm">
    <xsl:apply-templates select="child::node()"/>
  </xsl:variable>

  <xsl:choose>
    <xsl:when test="function-available('exsl:node-set')">
      <xsl:apply-templates select="exsl:node-set($endterm)" mode="remove-ids"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:copy-of select="$endterm"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="*" mode="remove-ids">
  <xsl:copy>
    <xsl:for-each select="@*">
      <xsl:choose>
        <xsl:when test="name(.) != 'id'">
          <xsl:copy/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:message>removing <xsl:value-of select="name(.)"/></xsl:message>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:for-each>
    <xsl:apply-templates mode="remove-ids"/>
  </xsl:copy>
</xsl:template>

<!--- ==================================================================== -->

<xsl:template match="*" mode="xref-to-prefix"/>
<xsl:template match="*" mode="xref-to-suffix"/>

<xsl:template match="*" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>


  <xsl:if test="$verbose != 0">
    <xsl:message>
      <xsl:text>Don't know what gentext to create for xref to: "</xsl:text>
      <xsl:value-of select="name(.)"/>
      <xsl:text>"</xsl:text>
    </xsl:message>
    <xsl:text>???</xsl:text>
  </xsl:if>
</xsl:template>

<xsl:template match="title" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <!-- if you xref to a title, xref to the parent... -->
  <xsl:choose>
    <!-- FIXME: how reliable is this? -->
    <xsl:when test="contains(local-name(parent::*), 'info')">
      <xsl:apply-templates select="parent::*[2]" mode="xref-to">
        <xsl:with-param name="referrer" select="$referrer"/>
        <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
        <xsl:with-param name="verbose" select="$verbose"/>
      </xsl:apply-templates>
    </xsl:when>
    <xsl:otherwise>
      <xsl:apply-templates select="parent::*" mode="xref-to">
        <xsl:with-param name="referrer" select="$referrer"/>
        <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
        <xsl:with-param name="verbose" select="$verbose"/>
      </xsl:apply-templates>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="abstract|article|authorblurb|bibliodiv|bibliomset
                     |biblioset|blockquote|calloutlist|caution|colophon
                     |constraintdef|formalpara|glossdiv|important|indexdiv
                     |itemizedlist|legalnotice|lot|msg|msgexplan|msgmain
                     |msgrel|msgset|msgsub|note|orderedlist|partintro
                     |productionset|qandadiv|refsynopsisdiv|segmentedlist
                     |set|setindex|sidebar|tip|toc|variablelist|warning"
              mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <!-- catch-all for things with (possibly optional) titles -->
  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="author|editor|othercredit|personname" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:call-template name="person.name"/>
</xsl:template>

<xsl:template match="authorgroup" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:call-template name="person.name.list"/>
</xsl:template>

<xsl:template match="figure|example|table|equation" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="procedure" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="task" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="cmdsynopsis" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="(.//command)[1]" mode="xref"/>
</xsl:template>

<xsl:template match="funcsynopsis" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="(.//function)[1]" mode="xref"/>
</xsl:template>

<xsl:template match="dedication|preface|chapter|appendix" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="bibliography" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="biblioentry|bibliomixed" mode="xref-to-prefix">
  <xsl:text>[</xsl:text>
</xsl:template>

<xsl:template match="biblioentry|bibliomixed" mode="xref-to-suffix">
  <xsl:text>]</xsl:text>
</xsl:template>

<xsl:template match="biblioentry|bibliomixed" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <!-- handles both biblioentry and bibliomixed -->
  <xsl:choose>
    <xsl:when test="string(.) = ''">
      <xsl:variable name="bib" select="document($bibliography.collection,.)"/>
      <xsl:variable name="id" select="(@id|@xml:id)[1]"/>
      <xsl:variable name="entry" select="$bib/bibliography/
                                         *[@id=$id or @xml:id=$id][1]"/>
      <xsl:choose>
        <xsl:when test="$entry">
          <xsl:choose>
            <xsl:when test="$bibliography.numbered != 0">
              <xsl:number from="bibliography" count="biblioentry|bibliomixed"
                          level="any" format="1"/>
            </xsl:when>
            <xsl:when test="local-name($entry/*[1]) = 'abbrev'">
              <xsl:apply-templates select="$entry/*[1]"/>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="(@id|@xml:id)[1]"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:when>
        <xsl:otherwise>
          <xsl:message>
            <xsl:text>No bibliography entry: </xsl:text>
            <xsl:value-of select="$id"/>
            <xsl:text> found in </xsl:text>
            <xsl:value-of select="$bibliography.collection"/>
          </xsl:message>
          <xsl:value-of select="(@id|@xml:id)[1]"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:otherwise>
      <xsl:choose>
        <xsl:when test="$bibliography.numbered != 0">
          <xsl:number from="bibliography" count="biblioentry|bibliomixed"
                      level="any" format="1"/>
        </xsl:when>
        <xsl:when test="local-name(*[1]) = 'abbrev'">
          <xsl:apply-templates select="*[1]"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="(@id|@xml:id)[1]"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="glossary" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="glossentry" mode="xref-to">
  <xsl:choose>
    <xsl:when test="$glossentry.show.acronym = 'primary'">
      <xsl:choose>
        <xsl:when test="acronym|abbrev">
          <xsl:apply-templates select="(acronym|abbrev)[1]"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates select="glossterm[1]" mode="xref-to"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:otherwise>
      <xsl:apply-templates select="glossterm[1]" mode="xref-to"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="glossterm" mode="xref-to">
  <xsl:apply-templates/>
</xsl:template>

<xsl:template match="index" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="listitem" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="section|simplesect
                     |sect1|sect2|sect3|sect4|sect5
                     |refsect1|refsect2|refsect3|refsection" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
  <!-- What about "in Chapter X"? -->
</xsl:template>

<xsl:template match="bridgehead" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
  <!-- What about "in Chapter X"? -->
</xsl:template>

<xsl:template match="qandaset" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="qandadiv" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="qandaentry" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="question[1]" mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="question|answer" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="part|reference" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="refentry" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:choose>
    <xsl:when test="refmeta/refentrytitle">
      <xsl:apply-templates select="refmeta/refentrytitle"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:apply-templates select="refnamediv/refname[1]"/>
    </xsl:otherwise>
  </xsl:choose>
  <xsl:apply-templates select="refmeta/manvolnum"/>
</xsl:template>

<xsl:template match="refnamediv" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="refname[1]" mode="xref-to">
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="refname" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates mode="xref-to">
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="step" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:call-template name="gentext">
    <xsl:with-param name="key" select="'Step'"/>
  </xsl:call-template>
  <xsl:text> </xsl:text>
  <xsl:apply-templates select="." mode="number"/>
</xsl:template>

<xsl:template match="varlistentry" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="term[1]" mode="xref-to">
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="varlistentry/term" mode="xref-to">
  <xsl:param name="verbose" select="1"/>
  <!-- to avoid the comma that will be generated if there are several terms -->
  <xsl:apply-templates/>
</xsl:template>

<xsl:template match="co" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="callout-bug"/>
</xsl:template>

<xsl:template match="book" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose" select="1"/>

  <xsl:apply-templates select="." mode="object.xref.markup">
    <xsl:with-param name="purpose" select="'xref'"/>
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="para" mode="xref-to">
  <xsl:param name="referrer"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="verbose"/>

  <xsl:variable name="context" select="(ancestor::simplesect
                                       |ancestor::section
                                       |ancestor::sect1
                                       |ancestor::sect2
                                       |ancestor::sect3
                                       |ancestor::sect4
                                       |ancestor::sect5
                                       |ancestor::refsection
                                       |ancestor::refsect1
                                       |ancestor::refsect2
                                       |ancestor::refsect3
                                       |ancestor::chapter
                                       |ancestor::appendix
                                       |ancestor::preface
                                       |ancestor::partintro
                                       |ancestor::dedication
                                       |ancestor::colophon
                                       |ancestor::bibliography
                                       |ancestor::index
                                       |ancestor::glossary
                                       |ancestor::glossentry
                                       |ancestor::listitem
                                       |ancestor::varlistentry)[last()]"/>

  <xsl:apply-templates select="$context" mode="xref-to">
    <xsl:with-param name="xrefstyle" select="$xrefstyle"/>
    <xsl:with-param name="referrer" select="$referrer"/>
    <xsl:with-param name="verbose" select="$verbose"/>
  </xsl:apply-templates>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template match="link" name="link">
  <xsl:param name="linkend" select="@linkend"/>
  <xsl:param name="targets" select="key('id',$linkend)"/>
  <xsl:param name="target" select="$targets[1]"/>

  <xsl:variable name="xrefstyle">
    <xsl:choose>
      <xsl:when test="@role and not(@xrefstyle) 
                      and $use.role.as.xrefstyle != 0">
        <xsl:value-of select="@role"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="@xrefstyle"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:variable name="content">
    <fo:inline xsl:use-attribute-sets="xref.properties">
      <xsl:choose>
        <xsl:when test="count(child::node()) &gt; 0">
          <!-- If it has content, use it -->
          <xsl:apply-templates/>
        </xsl:when>
        <!-- look for an endterm -->
        <xsl:when test="@endterm">
          <xsl:variable name="etargets" select="key('id',@endterm)"/>
          <xsl:variable name="etarget" select="$etargets[1]"/>
          <xsl:choose>
            <xsl:when test="count($etarget) = 0">
              <xsl:message>
                <xsl:value-of select="count($etargets)"/>
                <xsl:text>Endterm points to nonexistent ID: </xsl:text>
                <xsl:value-of select="@endterm"/>
              </xsl:message>
              <xsl:text>???</xsl:text>
            </xsl:when>
            <xsl:otherwise>
                <xsl:apply-templates select="$etarget" mode="endterm"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:when>
        <!-- Use the xlink:href if no other text -->
        <xsl:when test="@xlink:href">
          <xsl:value-of select="@xlink:href"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:message>
            <xsl:text>Link element has no content and no Endterm. </xsl:text>
            <xsl:text>Nothing to show in the link to </xsl:text>
            <xsl:value-of select="$target"/>
          </xsl:message>
          <xsl:text>???</xsl:text>
        </xsl:otherwise>
      </xsl:choose>
    </fo:inline>
  </xsl:variable>

  <xsl:call-template name="simple.xlink">
    <xsl:with-param name="node" select="."/>
    <xsl:with-param name="linkend" select="$linkend"/>
    <xsl:with-param name="content" select="$content"/>
  </xsl:call-template>

  <!-- Add standard page reference? -->
  <xsl:choose>
    <!-- page numbering on link only enabled for @linkend -->
    <!-- There is no link element in DB5 with xlink:href -->
    <xsl:when test="not($linkend)">
    </xsl:when>
    <!-- negative xrefstyle in instance turns it off -->
    <xsl:when test="starts-with(normalize-space($xrefstyle), 'select:') 
                  and contains($xrefstyle, 'nopage')">
    </xsl:when>
    <xsl:when test="(starts-with(normalize-space($xrefstyle), 'select:') 
                  and $insert.link.page.number = 'maybe'  
                  and (contains($xrefstyle, 'page')
                       or contains($xrefstyle, 'Page')))
                  or ( $insert.link.page.number = 'yes' 
                     or $insert.link.page.number = '1')
                  or local-name($target) = 'para'">
      <xsl:apply-templates select="$target" mode="page.citation">
        <xsl:with-param name="id" select="$linkend"/>
      </xsl:apply-templates>
    </xsl:when>
  </xsl:choose>
</xsl:template>

<xsl:template match="ulink" name="ulink">
  <xsl:param name="url" select="@url"/>

  <xsl:variable name ="ulink.url">
    <xsl:call-template name="fo-external-image">
      <xsl:with-param name="filename" select="$url"/>
    </xsl:call-template>
  </xsl:variable>

  <fo:basic-link xsl:use-attribute-sets="xref.properties"
                 external-destination="{$ulink.url}">
    <xsl:choose>
      <xsl:when test="count(child::node())=0">
        <xsl:call-template name="hyphenate-url">
          <xsl:with-param name="url" select="$url"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:otherwise>
        <xsl:apply-templates/>
      </xsl:otherwise>
    </xsl:choose>
  </fo:basic-link>

  <xsl:if test="count(child::node()) != 0
                and string(.) != $url
                and $ulink.show != 0">
    <!-- yes, show the URI -->
    <xsl:choose>
      <xsl:when test="$ulink.footnotes != 0 and not(ancestor::footnote)">
        <fo:footnote>
          <xsl:call-template name="ulink.footnote.number"/>
          <fo:footnote-body xsl:use-attribute-sets="footnote.properties">
            <fo:block>
              <xsl:call-template name="ulink.footnote.number"/>
              <xsl:text> </xsl:text>
              <fo:basic-link external-destination="{$ulink.url}">
                <xsl:value-of select="$url"/>
              </fo:basic-link>
            </fo:block>
          </fo:footnote-body>
        </fo:footnote>
      </xsl:when>
      <xsl:otherwise>
        <fo:inline hyphenate="false">
          <xsl:text> [</xsl:text>
          <fo:basic-link external-destination="{$ulink.url}">
            <xsl:call-template name="hyphenate-url">
              <xsl:with-param name="url" select="$url"/>
            </xsl:call-template>
          </fo:basic-link>
          <xsl:text>]</xsl:text>
        </fo:inline>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:if>

</xsl:template>

<xsl:template name="ulink.footnote.number">
  <fo:inline xsl:use-attribute-sets="footnote.mark.properties">
    <xsl:choose>
      <xsl:when test="$fop.extensions != 0">
        <xsl:attribute name="vertical-align">super</xsl:attribute>
      </xsl:when>
      <xsl:otherwise>
        <xsl:attribute name="baseline-shift">super</xsl:attribute>
      </xsl:otherwise>
    </xsl:choose>
    <xsl:variable name="fnum">
      <!-- FIXME: list in @from is probably not complete -->
      <xsl:number level="any" 
                  from="chapter|appendix|preface|article|refentry|bibliography[not(parent::article)]" 
                  count="footnote[not(@label)][not(ancestor::tgroup)]|ulink[node()][@url != .][not(ancestor::footnote)]" 
                  format="1"/>
    </xsl:variable>
    <xsl:choose>
      <xsl:when test="string-length($footnote.number.symbols) &gt;= $fnum">
        <xsl:value-of select="substring($footnote.number.symbols, $fnum, 1)"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:number value="$fnum" format="{$footnote.number.format}"/>
      </xsl:otherwise>
    </xsl:choose>
  </fo:inline>
</xsl:template>

<xsl:template name="hyphenate-url">
  <xsl:param name="url" select="''"/>
  <xsl:choose>
    <xsl:when test="$ulink.hyphenate = ''">
      <xsl:value-of select="$url"/>
    </xsl:when>
    <xsl:when test="string-length($url) &gt; 1">
      <xsl:variable name="char" select="substring($url, 1, 1)"/>
      <xsl:value-of select="$char"/>
      <xsl:if test="contains($ulink.hyphenate.chars, $char)">
        <!-- Do not hyphen in-between // -->
        <xsl:if test="not($char = '/' and substring($url,2,1) = '/')">
          <xsl:copy-of select="$ulink.hyphenate"/>
        </xsl:if>
      </xsl:if>
      <!-- recurse to the next character -->
      <xsl:call-template name="hyphenate-url">
        <xsl:with-param name="url" select="substring($url, 2)"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$url"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="olink" name="olink">
  <!-- olink content may be passed in from xlink olink -->
  <xsl:param name="content" select="NOTANELEMENT"/>

  <xsl:call-template name="anchor"/>

  <xsl:variable name="localinfo" select="@localinfo"/>

  <xsl:choose>
    <!-- olinks resolved by stylesheet and target database -->
    <xsl:when test="@targetdoc or @targetptr or
                    (@xlink:role=$xolink.role and
                     contains(@xlink:href, '#') )" >

      <xsl:variable name="targetdoc.att">
        <xsl:choose>
          <xsl:when test="@targetdoc != ''">
            <xsl:value-of select="@targetdoc"/>
          </xsl:when>
          <xsl:when test="@xlink:role=$xolink.role and
                       contains(@xlink:href, '#')" >
            <xsl:value-of select="substring-before(@xlink:href, '#')"/>
          </xsl:when>
        </xsl:choose>
      </xsl:variable>

      <xsl:variable name="targetptr.att">
        <xsl:choose>
          <xsl:when test="@targetptr != ''">
            <xsl:value-of select="@targetptr"/>
          </xsl:when>
          <xsl:when test="@xlink:role=$xolink.role and
                       contains(@xlink:href, '#')" >
            <xsl:value-of select="substring-after(@xlink:href, '#')"/>
          </xsl:when>
        </xsl:choose>
      </xsl:variable>

      <xsl:variable name="olink.lang">
        <xsl:call-template name="l10n.language">
          <xsl:with-param name="xref-context" select="true()"/>
        </xsl:call-template>
      </xsl:variable>
    
      <xsl:variable name="target.database.filename">
        <xsl:call-template name="select.target.database">
          <xsl:with-param name="targetdoc.att" select="$targetdoc.att"/>
          <xsl:with-param name="targetptr.att" select="$targetptr.att"/>
          <xsl:with-param name="olink.lang" select="$olink.lang"/>
        </xsl:call-template>
      </xsl:variable>
    
      <xsl:variable name="target.database" 
          select="document($target.database.filename, /)"/>
    
      <xsl:if test="$olink.debug != 0">
        <xsl:message>
          <xsl:text>Olink debug: root element of target.database is '</xsl:text>
          <xsl:value-of select="local-name($target.database/*[1])"/>
          <xsl:text>'.</xsl:text>
        </xsl:message>
      </xsl:if>
    
      <xsl:variable name="olink.key">
        <xsl:call-template name="select.olink.key">
          <xsl:with-param name="targetdoc.att" select="$targetdoc.att"/>
          <xsl:with-param name="targetptr.att" select="$targetptr.att"/>
          <xsl:with-param name="olink.lang" select="$olink.lang"/>
          <xsl:with-param name="target.database" select="$target.database"/>
        </xsl:call-template>
      </xsl:variable>
    
      <xsl:if test="string-length($olink.key) = 0">
        <xsl:message>
          <xsl:text>Error: unresolved olink: </xsl:text>
          <xsl:text>targetdoc/targetptr = '</xsl:text>
          <xsl:value-of select="$targetdoc.att"/>
          <xsl:text>/</xsl:text>
          <xsl:value-of select="$targetptr.att"/>
          <xsl:text>'.</xsl:text>
        </xsl:message>
      </xsl:if>

      <xsl:variable name="href">
        <xsl:call-template name="make.olink.href">
          <xsl:with-param name="olink.key" select="$olink.key"/>
          <xsl:with-param name="target.database" select="$target.database"/>
        </xsl:call-template>
      </xsl:variable>

      <!-- Olink that points to internal id can be a link -->
      <xsl:variable name="linkend">
        <xsl:call-template name="olink.as.linkend">
          <xsl:with-param name="olink.key" select="$olink.key"/>
          <xsl:with-param name="olink.lang" select="$olink.lang"/>
          <xsl:with-param name="target.database" select="$target.database"/>
        </xsl:call-template>
      </xsl:variable>

      <xsl:variable name="hottext">
        <xsl:choose>
          <xsl:when test="$content">
            <xsl:copy-of select="$content"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:call-template name="olink.hottext">
              <xsl:with-param name="olink.key" select="$olink.key"/>
              <xsl:with-param name="olink.lang" select="$olink.lang"/>
              <xsl:with-param name="target.database" select="$target.database"/>
            </xsl:call-template>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:variable>

      <xsl:variable name="olink.docname.citation">
        <xsl:call-template name="olink.document.citation">
          <xsl:with-param name="olink.key" select="$olink.key"/>
          <xsl:with-param name="target.database" select="$target.database"/>
          <xsl:with-param name="olink.lang" select="$olink.lang"/>
        </xsl:call-template>
      </xsl:variable>

      <xsl:variable name="olink.page.citation">
        <xsl:call-template name="olink.page.citation">
          <xsl:with-param name="olink.key" select="$olink.key"/>
          <xsl:with-param name="target.database" select="$target.database"/>
          <xsl:with-param name="olink.lang" select="$olink.lang"/>
          <xsl:with-param name="linkend" select="$linkend"/>
        </xsl:call-template>
      </xsl:variable>

      <xsl:choose>
        <xsl:when test="$linkend != ''">
          <fo:basic-link internal-destination="{$linkend}"
                       xsl:use-attribute-sets="xref.properties">
            <xsl:copy-of select="$hottext"/>
            <xsl:copy-of select="$olink.page.citation"/>
          </fo:basic-link>
        </xsl:when>
        <xsl:when test="$href != ''">
          <xsl:choose>
            <xsl:when test="$xep.extensions != 0">
              <fo:basic-link external-destination="url({$href})"
                             xsl:use-attribute-sets="olink.properties">
                <xsl:copy-of select="$hottext"/>
              </fo:basic-link>
              <xsl:copy-of select="$olink.page.citation"/>
              <xsl:copy-of select="$olink.docname.citation"/>
            </xsl:when>
            <xsl:when test="$axf.extensions != 0">
              <fo:basic-link external-destination="{$href}"
                             xsl:use-attribute-sets="olink.properties">
                <xsl:copy-of select="$hottext"/>
              </fo:basic-link>
              <xsl:copy-of select="$olink.page.citation"/>
              <xsl:copy-of select="$olink.docname.citation"/>
            </xsl:when>
            <xsl:otherwise>
              <fo:basic-link external-destination="{$href}"
                             xsl:use-attribute-sets="olink.properties">
                <xsl:copy-of select="$hottext"/>
              </fo:basic-link>
              <xsl:copy-of select="$olink.page.citation"/>
              <xsl:copy-of select="$olink.docname.citation"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:when>
        <xsl:otherwise>
          <xsl:copy-of select="$hottext"/>
          <xsl:copy-of select="$olink.page.citation"/>
          <xsl:copy-of select="$olink.docname.citation"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>

    <!-- olink never implemented in FO for old olink entity syntax -->
    <xsl:otherwise>
      <xsl:apply-templates/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="*" mode="insert.olink.docname.markup">
  <xsl:param name="docname" select="''"/>
  
  <fo:inline font-style="italic">
    <xsl:value-of select="$docname"/>
  </fo:inline>

</xsl:template>

<!-- This prevents error message when processing olinks with xrefstyle -->
<xsl:template match="olink" mode="object.xref.template"/>


<xsl:template name="olink.as.linkend">
  <xsl:param name="olink.key" select="''"/>
  <xsl:param name="olink.lang" select="''"/>
  <xsl:param name="target.database" select="NotANode"/>

  <xsl:variable name="targetdoc">
    <xsl:value-of select="substring-before($olink.key, '/')"/>
  </xsl:variable>

  <xsl:variable name="targetptr">
    <xsl:value-of 
       select="substring-before(substring-after($olink.key, '/'), '/')"/>
  </xsl:variable>

  <xsl:variable name="target.lang">
    <xsl:variable name="candidate">
      <xsl:for-each select="$target.database" >
        <xsl:value-of 
                  select="key('targetptr-key', $olink.key)/@lang" />
      </xsl:for-each>
    </xsl:variable>
    <xsl:choose>
      <xsl:when test="$candidate != ''">
        <xsl:value-of select="$candidate"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$olink.lang"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:if test="$current.docid = $targetdoc and 
                $olink.lang = $target.lang">
    <xsl:variable name="targets" select="key('id',$targetptr)"/>
    <xsl:variable name="target" select="$targets[1]"/>
    <xsl:if test="$target">
      <xsl:value-of select="$targetptr"/>
    </xsl:if>
  </xsl:if>

</xsl:template>


<xsl:template name="olink.outline">
  <xsl:param name="outline.base.uri"/>
  <xsl:param name="localinfo"/>
  <xsl:param name="return" select="href"/>

  <xsl:message terminate="yes">Fatal error: olink.outline template: what is this supposed to do?</xsl:message>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template name="title.xref">
  <xsl:param name="target" select="."/>
  <xsl:choose>
    <xsl:when test="local-name($target) = 'figure'
                    or local-name($target) = 'example'
                    or local-name($target) = 'equation'
                    or local-name($target) = 'table'
                    or local-name($target) = 'dedication'
                    or local-name($target) = 'preface'
                    or local-name($target) = 'bibliography'
                    or local-name($target) = 'glossary'
                    or local-name($target) = 'index'
                    or local-name($target) = 'setindex'
                    or local-name($target) = 'colophon'">
      <xsl:call-template name="gentext.startquote"/>
      <xsl:apply-templates select="$target" mode="title.markup"/>
      <xsl:call-template name="gentext.endquote"/>
    </xsl:when>
    <xsl:otherwise>
      <fo:inline font-style="italic">
        <xsl:apply-templates select="$target" mode="title.markup"/>
      </fo:inline>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="number.xref">
  <xsl:param name="target" select="."/>
  <xsl:apply-templates select="$target" mode="label.markup"/>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template name="xref.xreflabel">
  <!-- called to process an xreflabel...you might use this to make  -->
  <!-- xreflabels come out in the right font for different targets, -->
  <!-- for example. -->
  <xsl:param name="target" select="."/>
  <xsl:value-of select="$target/@xreflabel"/>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template match="title" mode="xref">
  <xsl:apply-templates/>
</xsl:template>

<xsl:template match="command" mode="xref">
  <xsl:call-template name="inline.boldseq"/>
</xsl:template>

<xsl:template match="function" mode="xref">
  <xsl:call-template name="inline.monoseq"/>
</xsl:template>

<xsl:template match="*" mode="page.citation">
  <xsl:param name="id" select="'???'"/>

  <fo:basic-link internal-destination="{$id}"
                 xsl:use-attribute-sets="xref.properties">
    <fo:inline keep-together.within-line="always">
      <xsl:call-template name="substitute-markup">
        <xsl:with-param name="template">
          <xsl:call-template name="gentext.template">
            <xsl:with-param name="name" select="'page.citation'"/>
            <xsl:with-param name="context" select="'xref'"/>
          </xsl:call-template>
        </xsl:with-param>
      </xsl:call-template>
    </fo:inline>
  </fo:basic-link>
</xsl:template>

<xsl:template match="*" mode="pagenumber.markup">
  <xsl:variable name="id">
    <xsl:call-template name="object.id"/>
  </xsl:variable>
  <fo:page-number-citation ref-id="{$id}"/>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template match="*" mode="insert.title.markup">
  <xsl:param name="purpose"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="title"/>

  <xsl:choose>
    <!-- FIXME: what about the case where titleabbrev is inside the info? -->
    <xsl:when test="$purpose = 'xref' and titleabbrev">
      <xsl:apply-templates select="." mode="titleabbrev.markup"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:copy-of select="$title"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="chapter|appendix" mode="insert.title.markup">
  <xsl:param name="purpose"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="title"/>

  <xsl:choose>
    <xsl:when test="$purpose = 'xref'">
      <fo:inline font-style="italic">
        <xsl:copy-of select="$title"/>
      </fo:inline>
    </xsl:when>
    <xsl:otherwise>
      <xsl:copy-of select="$title"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="*" mode="insert.subtitle.markup">
  <xsl:param name="purpose"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="subtitle"/>

  <xsl:copy-of select="$subtitle"/>
</xsl:template>

<xsl:template match="*" mode="insert.label.markup">
  <xsl:param name="purpose"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="label"/>

  <xsl:copy-of select="$label"/>
</xsl:template>

<xsl:template match="*" mode="insert.pagenumber.markup">
  <xsl:param name="purpose"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="pagenumber"/>

  <xsl:copy-of select="$pagenumber"/>
</xsl:template>

<xsl:template match="*" mode="insert.direction.markup">
  <xsl:param name="purpose"/>
  <xsl:param name="xrefstyle"/>
  <xsl:param name="direction"/>

  <xsl:copy-of select="$direction"/>
</xsl:template>

<xsl:template match="olink" mode="pagenumber.markup">
  <!-- Local olinks can use page-citation -->
  <xsl:variable name="targetdoc.att" select="@targetdoc"/>
  <xsl:variable name="targetptr.att" select="@targetptr"/>

  <xsl:variable name="olink.lang">
    <xsl:call-template name="l10n.language">
      <xsl:with-param name="xref-context" select="true()"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="target.database.filename">
    <xsl:call-template name="select.target.database">
      <xsl:with-param name="targetdoc.att" select="$targetdoc.att"/>
      <xsl:with-param name="targetptr.att" select="$targetptr.att"/>
      <xsl:with-param name="olink.lang" select="$olink.lang"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="target.database" 
      select="document($target.database.filename, /)"/>

  <xsl:if test="$olink.debug != 0">
    <xsl:message>
      <xsl:text>Olink debug: root element of target.database is '</xsl:text>
      <xsl:value-of select="local-name($target.database/*[1])"/>
      <xsl:text>'.</xsl:text>
    </xsl:message>
  </xsl:if>

  <xsl:variable name="olink.key">
    <xsl:call-template name="select.olink.key">
      <xsl:with-param name="targetdoc.att" select="$targetdoc.att"/>
      <xsl:with-param name="targetptr.att" select="$targetptr.att"/>
      <xsl:with-param name="olink.lang" select="$olink.lang"/>
      <xsl:with-param name="target.database" select="$target.database"/>
    </xsl:call-template>
  </xsl:variable>

  <!-- Olink that points to internal id can be a link -->
  <xsl:variable name="linkend">
    <xsl:call-template name="olink.as.linkend">
      <xsl:with-param name="olink.key" select="$olink.key"/>
      <xsl:with-param name="olink.lang" select="$olink.lang"/>
      <xsl:with-param name="target.database" select="$target.database"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:choose>
    <xsl:when test="$linkend != ''">
      <fo:page-number-citation ref-id="{$linkend}"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:message>
        <xsl:text>Olink error: no page number linkend for local olink '</xsl:text>
        <xsl:value-of select="$olink.key"/>
        <xsl:text>'</xsl:text>
      </xsl:message>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

</xsl:stylesheet>