Re: configuring a conditional

The question I'd ask is what's @linkend. This of course depends on
what the context node is -- so we need to consider where this appears.

XSLT 2.0 functions work different from templates in that they don't
have a context node (or position or size) ... instead of relying on
being able to traverse from the context node to its @linkend
attribute, for example, you have to pass the node in and then traverse
to $node/@linkend.

Could this be an issue here? We need to see more code. But guessing
out of the blue (that is, guessing you are defining a function here) I
suppose you might try test="$cite-ref is
key('refs',$cite-ref/@linkend)[1]".

I'd like to have a function, but thought I'd start with a variable
first.  I didn't post the code because it's a little hairy, but here
goes:

  <xsl:template name="bib:format-citation">
    <xsl:param name="output-format" as="xs:string"/>
    <!-- create a temporary tree to hold the processing citations -->
    <xsl:variable name="intermediate-citation">
      <xsl:value-of select="$style-citation/cs:prefix"/>
      <xsl:choose>
        <!-- FIX: add additional sort modes -->
        <xsl:when test="$sort_order-bib='author-year'">
          <xsl:apply-templates select="."
mode="sort_citation_author-year">
            <xsl:with-param name="output-format"
select="$output-format" as="xs:string" tunnel="yes"
            />
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates select="db:biblioref" mode="otherwise"/>
        </xsl:otherwise>
      </xsl:choose>
      <xsl:value-of select="$style-citation/cs:suffix"/>
    </xsl:variable>
    <!--
    create formatted output by running appropriate output mode on the
temporary
    tree in the intermediate-citation variable
    -->
    <xsl:choose>
      <xsl:when test="$output-format='latex'">
        <xsl:apply-templates select="$intermediate-citation"
mode="output-latex"/>
      </xsl:when>
      <xsl:when test="$output-format='xhtml'">
        <xsl:apply-templates select="$intermediate-citation"
mode="output-xhtml"/>
      </xsl:when>
    </xsl:choose>
  </xsl:template>

  <xsl:template match="db:citation" mode="sort_citation_author-year">
    <!-- store citation for future use -->
    <xsl:variable name="citation" select="."/>
    <xsl:variable name="local-cite-style"
select="db:biblioref/@xrefstyle"/>
    <xsl:variable name="idref"
      select="db:biblioref/@linkend, course:reading/@refid"/>
    <xsl:variable name="bibref"

select="$enhanced-biblist/mods:modsCollection/mods:mods[@ID=$idref]"/>
    <bib:span class="citation">
      <xsl:for-each-group select="$bibref" group-by="@bib:sort-on">
        <xsl:sort select="current-grouping-key()"/>
        <xsl:variable name="refs-for-author-sorted-by-year"
          as="element(mods:mods)*">
          <xsl:perform-sort select="current-group()">
            <xsl:sort select="bib:year"/>
          </xsl:perform-sort>
        </xsl:variable>
        <xsl:variable name="first-ref-for-author"
as="element(mods:mods)"
          select="$refs-for-author-sorted-by-year[1]"/>
        <xsl:variable name="last-ref-for-author" as="element(mods:mods)"
          select="$refs-for-author-sorted-by-year[position() =
last()]"/>
        <xsl:for-each-group select="$refs-for-author-sorted-by-year"
          group-adjacent="bib:year">
          <xsl:for-each select="current-group()">
            <xsl:variable name="first-in-author-group"
              select=". is $first-ref-for-author" as="xs:boolean"/>
            <xsl:variable name="last-in-author-group"
              select=". is $last-ref-for-author" as="xs:boolean"/>
            <xsl:variable name="id" select="@ID"/>
            <!-- earlier the cite-ref variable was defined as just
element(), but
            for some reason this yielded an empty-sequence error in one
case -->
            <xsl:variable name="cite-ref" as="element()*">
              <xsl:sequence
select="$citation/db:biblioref[@linkend=$id]"/>
            </xsl:variable>
            <xsl:choose>
              <xsl:when test="$citeclass='note-bib' or
$citeclass='note-nobib'">
                <xsl:apply-templates select="." mode="citation_note">
                  <xsl:with-param name="first-in-author-group"
                    select="$first-in-author-group"/>
                  <xsl:with-param name="last-in-author-group"
                    select="$last-in-author-group"/>
                  <xsl:with-param name="local-cite-style"
select="$local-cite-style"/>
                  <xsl:with-param name="cite-ref" select="$cite-ref"
as="element()*"/>
                </xsl:apply-templates>
              </xsl:when>
              <xsl:otherwise>
                <xsl:apply-templates select="."
mode="citation_author-year">
                  <xsl:with-param name="first-in-author-group"
                    select="$first-in-author-group"/>
                  <xsl:with-param name="last-in-author-group"
                    select="$last-in-author-group"/>
                  <xsl:with-param name="local-cite-style"
select="$local-cite-style"/>
                  <xsl:with-param name="cite-ref" select="$cite-ref"
as="element()*"/>
                </xsl:apply-templates>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:for-each>
        </xsl:for-each-group>
        <xsl:if test="position() != last()">; </xsl:if>
      </xsl:for-each-group>
    </bib:span>
  </xsl:template>

  <xsl:template match="mods:mods" mode="citation_author-year">
    <xsl:param name="local-cite-style"/>
    <xsl:param name="cite-ref" as="element()*"/>
    <xsl:param name="citation"/>
    <xsl:param name="first-in-author-group" as="xs:boolean"/>
    <xsl:param name="last-in-author-group" as="xs:boolean"/>
    <xsl:message>
      <xsl:if test="$cite-ref is key('refs',@linkend)[1]">FIRST</xsl:if>
    </xsl:message>
    <bib:a class="citation" href="#{@ID}">
      <xsl:if test="$first-in-author-group and
not($local-cite-style='year')">
        <xsl:choose>
          <xsl:when test="bib:noname-substitute">
            <xsl:value-of select="bib:noname-substitute"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:apply-templates
select="mods:name[mods:role/mods:roleTerm=$primary-contributors]"
              mode="short"/>
          </xsl:otherwise>
        </xsl:choose>
        <xsl:value-of
select="$style-citation/cs:entry/cs:creator/cs:suffix"/>
      </xsl:if>
      <xsl:value-of select="bib:year"/>
      <xsl:value-of select="bib:year-suffix"/>
      <xsl:if test="$cite-ref/@begin">
        <xsl:value-of
select="$style-citation/cs:entry/cs:point/cs:prefix"/>
        <xsl:value-of select="$cite-ref/@begin"/>
        <xsl:if test="$cite-ref/@end">
          <xsl:text></xsl:text>
          <xsl:value-of select="bib:number-condense($cite-ref/@begin,
$cite-ref/@end)"/>
        </xsl:if>
      </xsl:if>
    </bib:a>
    <xsl:if test="not($last-in-author-group)">, </xsl:if>
  </xsl:template>