Conditional sorting for XSLTSearch 1.0

gistfile1.xml

              <xsl:choose>
                <xsl:when test="umbraco.library:RequestQueryString('sortbydate') != ''">
                  <xsl:for-each select="$matchedNodes">
                    <!-- sort on the page score of the node, within ALL the nodes to return (the sorting must happen before choosing the nodes for this page) -->
                    <xsl:sort select="@createDate" order="descending"/>
                    <!-- only the nodes for this page -->
                    <xsl:if test="position() &gt;= $startMatch and position() &lt;= $endMatch">
                      <xsl:call-template name="postlist" />
                    </xsl:if>
                    <xsl:comment/>
                  </xsl:for-each>                  
                </xsl:when>
                <xsl:otherwise>
                  <xsl:for-each select="$matchedNodes">
                    <!-- sort on the page score of the node, within ALL the nodes to return (the sorting must happen before choosing the nodes for this page) -->
                    <xsl:sort select="substring-before(substring-after($pageScoreList, concat(';',generate-id(.),'=')),';')" data-type="number" order="descending"/>
                    <!-- only the nodes for this page -->
                    <xsl:if test="position() &gt;= $startMatch and position() &lt;= $endMatch">
                      <xsl:call-template name="postlist" />
                    </xsl:if>
                    <xsl:comment/>
                  </xsl:for-each>
                </xsl:otherwise>
              </xsl:choose>

Problem with this is that the first selects an attribute, whereas the other selects a string - you cannot put a predicate on a string, so you'd need to wrap that somehow...

Hmmm... edge-case...

/Chriztian