[xsl] temp trees and context switching

[Bruce D'Arcus <bdarcus@xxxxxxxxxxxxx>]

With previous simple example working, I'm now trying to integrate the  
ideas into my stylesheets.

So the idea is

1)  create a "citekey" key that indexes all db:biblioref element  
linkend attribute values.
2)  use distinct-values in the citekey key to construct a  
mods:modsCollection in the temporary tree (which is what I currently  
assume is embedded in the db:bibliography element).
3)  all subsequent processing would as it had previously been working  
correctly

Below is my first few templates (I can't post the entire code), with  
source example below it.  Am I doing something wrong with using the  
call-template below?

<xsl:key name="citekey" match="db:biblioref/@linkend" use="'all'" />

  <xsl:template match="/">
    <xsl:variable name="temp">
      <xsl:apply-templates mode="enhanced-bib"/>
    </xsl:variable>
    <xsl:apply-templates select="$temp" mode="modified"/>
  </xsl:template>
  <xsl:template match="db:article" mode="enhanced-bib">
    <article>
      <xsl:apply-templates mode="enhanced-bib"/>
    </article>
  </xsl:template>
  <xsl:template match="db:info" mode="enhanced-bib">
    <xsl:copy-of select="."/>
  </xsl:template>
  <xsl:template match="db:section[$citation-class='author-year']"  
mode="enhanced-bib">
    <xsl:copy-of select="."/>
  </xsl:template>

  <xsl:template match="db:bibliography" mode="enhanced-bib">
    <bibliography>
      <xsl:for-each select="distinct-values(key('citekey', 'all'))">
        <xsl:variable name="bibrecord"
		select="doc(concat('/Users/darcusb/Desktop/xbiblio-alt/samples/bib- 
data/', ., '.mods'))/mods:modsCollection/mods:mods"/>
	<modsCollection xmlns="http://www.loc.gov/mods/v3";>
          <xsl:call-template name="enhanced-bib">
            <xsl:with-param name="bibrecord" select="$bibrecord"/>
          </xsl:call-template>
	</modsCollection>
      </xsl:for-each>
    </bibliography>
  </xsl:template>

<xsl:template name="enhanced-bib">
  <xsl:param name="bibrecord"/>
  <xsl:copy>
    <xsl:variable name="bibref" select="$bibrecord" />
    <xsl:for-each-group select="$bibrecord"  
group-by="bib:grouping-key(.)">
      <xsl:sort select="current-grouping-key()"/>
      <xsl:for-each-group select="current-group()"
	        group-by="substring((mods:originInfo/mods:dateIssued ,
				mods:relatedItem/mods:originInfo/mods:dateIssued ,
				mods:relatedItem/mods:part/mods:date )[1],1,4)">
	<xsl:sort select="current-grouping-key()" />
	<xsl:variable name="refclass">
	  <xsl:choose>
	    <xsl:when test="mods:relatedItem[@type='host']">
	      <xsl:choose>
		<xsl:when
		     
test="mods:relatedItem[@type='host']/mods:originInfo/mods: 
issuance='monographic'">part-inMonograph</xsl:when>
		<xsl:otherwise>part-inSerial</xsl:otherwise>
	      </xsl:choose>
	    </xsl:when>
	    <xsl:otherwise>monograph</xsl:otherwise>
	  </xsl:choose>
	</xsl:variable>
	<xsl:variable name="reftype">
	  <xsl:choose>
	    <xsl:when test="$refclass='part-inSerial'">
	      <xsl:text>article</xsl:text>
	      <xsl:text>-</xsl:text>
	      <xsl:value-of select="mods:relatedItem/mods:genre"/>
	    </xsl:when>
	    <xsl:otherwise>
	      <xsl:value-of select="mods:genre"/>
	    </xsl:otherwise>
	  </xsl:choose>
	</xsl:variable>
	<xsl:variable name="year"
		select="current-grouping-key()"/>
	<xsl:variable name="first" as="xs:boolean" select="position() = 1" />
	<xsl:variable name="noname-substitute">
	  <xsl:choose>
	    <xsl:when test="not(mods:name) and $refclass='part-inSerial'">
	      <xsl:value-of
	        
select="mods:relatedItem[@type='host']/mods:titleInfo[not(@type)]/mods: 
title"/>
	    </xsl:when>
	    <xsl:when test="not(mods:name) and not($refclass='part-inSerial')">
	      <xsl:text>Anonymous</xsl:text>
	    </xsl:when>
	  </xsl:choose>
        </xsl:variable>
	<xsl:for-each select="current-group()">
	  <mods ID="{@ID}">
<!-- We create enhanced virtual elements to help subsequent processing.  
-->
	    <refclass>
	      <xsl:value-of select="$refclass"/>
	    </refclass>
	    <reftype>
	      <xsl:value-of select="$reftype"/>
	    </reftype>
	    <year>
	      <xsl:value-of select="current-grouping-key()"/>
	    </year>
<!-- noname-substitute element determines what to do when there is no  
author name. -->
	    <noname-substitute>
	      <xsl:value-of select="$noname-substitute"/>
	    </noname-substitute>
	    <xsl:if test="last() > 1">
	      <key type="year-suffix">
		<xsl:number value="position()" format="a"/>
	      </key>
	    </xsl:if>
	    <xsl:copy-of select="*"/>
	  </mods>
	</xsl:for-each>
      </xsl:for-each-group>
    </xsl:for-each-group>
  </xsl:copy>
</xsl:template>

=== source ===

<?xml version="1.0" encoding="utf-8"?>
<article xmlns="http://docbook.org/docbook-ng";>
  <info>
    <title>Test</title>
  </info>
  <section>
    <info>
      <title>Introduction</title>
    </info>
    <para>Some citations: <citation><biblioref linkend="one"/><biblioref
    linkend="two"/><biblioref linkend="three"/></citation>.</para>
    <para>A citation with page number detail: <citation><biblioref  
linkend="one"
    units="page" begin="23" end="24" /></citation>. A
    citation <footnote><para>... in a footnote <citation><biblioref
    linkend="three" begin="234"/></citation></para></footnote>.</para>
  </section>
  <bibliography/>
</article>