Saxon

Here is the code that I'm using to sort glossary terms:

<xsl:for-each select="current-group()">
      <xsl:sort select="*[contains(@class, ' glossentry/glossterm ')]" collation="http://www.w3.org/2013/collation/UCA?lang=en-US;strength=tertiary;caseFirst=upper"/>
      <xsl:apply-templates select="." mode="processTopic"/>
</xsl:for-each>

However, I'm still getting the two terms "association" and "Association" getting sorted with lower-case first.

Am I doing something wrong?

I'm using Saxon-HE-9.9.1-7.

Thanks, Tim.