How can I return the max value of a set of nodes using FLWR? In this example I want to return:
...
<xsl:sequence select="for $x in changenumber return number(max($x))"/>

T:\ftemp>type philip.xml
<data>
        <set>
                <changenumber>0</changenumber>
                <changenumber>3</changenumber>
                <changenumber>0</changenumber>
        </set>
        <set>
                <changenumber>0</changenumber>
                <changenumber>2</changenumber>
                <changenumber>1</changenumber>
        </set>
        <set>
                <changenumber>0</changenumber>
        </set>
</data>

T:\ftemp>xslt2 philip.xml philip.xsl
<?xml version="1.0" encoding="UTF-8"?>3 2 0
T:\ftemp>type philip.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="2.0">
  <xsl:template match="/">
    <xsl:sequence select="for $s in /data/set return max($s/changenumber)"/>
  </xsl:template>
</xsl:stylesheet>
T:\ftemp>

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