Hi,

I am currently attempting in XSLT to generate a list of unique year values from a nodeset of news items.  I have always had a lot of success using the so-called Meunchian method (generate-id()) for this type of thing but for some reason, in this case, several year values are missing from the list, even though there are definitely items which have those (missing) values.  Result is 2014 | 2010 | 2009 but should in reality include 2013, 2012, and 2011 as well.  Can anyone tell what I am doing wrong here?  I would appreciate the help as I am stumped!

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
<xsl:stylesheet
  version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:msxml="urn:schemas-microsoft-com:xslt"
  xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:tagsLib="urn:tagsLib" xmlns:BlogLibrary="urn:BlogLibrary" xmlns:ucomponents.cms="urn:ucomponents.cms" xmlns:ucomponents.dates="urn:ucomponents.dates" xmlns:ucomponents.email="urn:ucomponents.email" xmlns:ucomponents.io="urn:ucomponents.io" xmlns:ucomponents.media="urn:ucomponents.media" xmlns:ucomponents.members="urn:ucomponents.members" xmlns:ucomponents.nodes="urn:ucomponents.nodes" xmlns:ucomponents.random="urn:ucomponents.random" xmlns:ucomponents.request="urn:ucomponents.request" xmlns:ucomponents.search="urn:ucomponents.search" xmlns:ucomponents.strings="urn:ucomponents.strings" xmlns:ucomponents.urls="urn:ucomponents.urls" xmlns:ucomponents.xml="urn:ucomponents.xml" xmlns:autofolders.library="urn:autofolders.library" xmlns:PS.XSLTsearch="urn:PS.XSLTsearch"
  exclude-result-prefixes="msxml
 umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes 
Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings 
Exslt.ExsltSets tagsLib BlogLibrary ucomponents.cms ucomponents.dates 
ucomponents.email ucomponents.io ucomponents.media ucomponents.members 
ucomponents.nodes ucomponents.random ucomponents.request 
ucomponents.search ucomponents.strings ucomponents.urls ucomponents.xml 
autofolders.library PS.XSLTsearch ">

<xsl:output method="xml" omit-xml-declaration="yes" />
<xsl:variable name="contentType" select="/macro/contentType"/>

<xsl:param name="currentPage"/>
<xsl:variable name="currentLanguage" select="$currentPage/ancestor-or-self::*[name() = 'Home']/language" />
<xsl:key name="uniqueYear" match="*" use="substring(datePosted,0,5)"/>

<xsl:variable name="year">
  <xsl:choose>
    <xsl:when test="normalize-space(umbraco.library:RequestQueryString('year'))">
      <xsl:value-of select="umbraco.library:RequestQueryString('year')"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="Exslt.ExsltDatesAndTimes:year()"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:variable>

<xsl:template match="/">

<xsl:variable name="selectedPages">
  <xsl:choose>
    <xsl:when test="$currentPage/@nodeName = 'Media' or $currentPage/@nodeName = 'Press Releases'">
      <root>
        <xsl:copy-of select="$currentPage/* [name() = $contentType][substring(datePosted,0,5) = $year]"/>
      </root>
    </xsl:when>
    <xsl:otherwise>
      <root>
        <xsl:copy-of select="$currentPage/* [name() = $contentType]"/>      
      </root>
    </xsl:otherwise>
  </xsl:choose>
</xsl:variable>
  
<xsl:if test="$currentPage/@nodeName = 'Press Releases'">
  <xsl:variable name="allPagesPR" select="$currentPage/* [name() = $contentType and @isDoc]"/>
  <div class="mini-page-nav">
    <a name="y">&nbsp;</a>
    <xsl:for-each select="$allPagesPR [generate-id() = generate-id(key('uniqueYear', substring(datePosted,0,5))[1])]">
      <xsl:sort select="substring(datePosted,0,5)" data-type="number" order="descending"/>
        <xsl:choose>
          <xsl:when test="substring(datePosted,0,5) = $year">
            <strong><xsl:value-of select="substring(datePosted,0,5)"/></strong>
          </xsl:when>
          <xsl:otherwise>
            <a href="?year={substring(datePosted,0,5)}#y">
              <xsl:value-of select="substring(datePosted,0,5)"/>
            </a>
          </xsl:otherwise>
        </xsl:choose>
      <xsl:if test="position() != last()"> | </xsl:if>
    </xsl:for-each>
    &nbsp;
  </div>
</xsl:if>
  
<div class="tabbedListHolder">

  <xsl:choose>
    <xsl:when test="count(msxml:node-set($selectedPages)/root/*) &gt; 0">
        
        <xsl:for-each select="msxml:node-set($selectedPages)/root/*">
  
          <xsl:sort select="datePosted" order="descending"/>
          
          ....blah blah blah
          
        </xsl:for-each>
      
    </xsl:when>
    <xsl:otherwise>
      <p>No items found in <xsl:value-of select="$currentPage/@nodeName"/>.</p>
    </xsl:otherwise>
  </xsl:choose>
  
</div>

</xsl:template>

<xsl:template name="FirstWords">
  
    <xsl:param name="words"/>
    <xsl:param name="text"/>

    <xsl:if test="$words &gt;= 1">
        <xsl:if test="umbraco.library:LastIndexOf($text, ' ') &gt; 0">
            <xsl:value-of select="substring-before($text, ' ')" disable-output-escaping="yes"/><xsl:text> </xsl:text>
        </xsl:if>
        <xsl:if test="umbraco.library:LastIndexOf($text, ' ') &lt;= 0">
            <xsl:value-of select="$text" disable-output-escaping="yes"/><xsl:text> </xsl:text>
        </xsl:if>

        <xsl:call-template name="FirstWords">
            <xsl:with-param name="words" select="$words - 1"/>
            <xsl:with-param name="text" select="substring-after($text, ' ')"/>
        </xsl:call-template>
    </xsl:if>

    <xsl:if test="$words = 1
            and umbraco.library:LastIndexOf($text, ' ') &gt; 0">
        <xsl:text>... </xsl:text>
    </xsl:if>

</xsl:template>

</xsl:stylesheet>

Thanks,

Garrett