XLST Run For-Each to check node value and update variable - xslt

Question

I'm trying to run the equivalent of an overall pass/fail.
I want it to check node-x, test if node-x is > or < 2.5, and update a variable based on the results. I want it to run through the whole set to see if any fail...
<xsl:variable name="overallPassFail" select="'true'" />
<xsl:for-each select="MsmtValueNode">
<xsl:variable name="EachValue" select="MsmtValueNode" />
<xsl:if test="$EachValue > 2.5">
<xsl:variable name="overallPassFail" select="'false'" />
</xsl:if>
<xsl:if test="$EachValue < 2.5">
<xsl:variable name="overallPassFail" select="'true'" />
</xsl:if>
</xsl:for-each>
<xsl:choose>
<xsl:when test="($overallPassFail = 'true')">
<div class="status_label_overview status_label_passed_overview">
Passed
</div>
</xsl:when>
<xsl:otherwise>
<div class="status_label_overview status_label_failed_overview">
Failed
</div>
</xsl:otherwise>
</xsl:choose>
It isn't updating the variable "overallPassFail" as I think it would, so looking for some help. Thanks in advance...

Answer 1

Consider the following minimal example:
XML
<root>
<MsmtValueNode>2.5</MsmtValueNode>
<MsmtValueNode>2.4</MsmtValueNode>
<MsmtValueNode>2.6</MsmtValueNode>
</root>
XSLT
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:template match="/root">
<div>
<xsl:choose>
<xsl:when test="MsmtValueNode < 2.5">Failed</xsl:when>
<xsl:otherwise>Passed</xsl:otherwise>
</xsl:choose>
</div>
</xsl:template>
</xsl:stylesheet>
Result
<?xml version="1.0" encoding="UTF-8"?>
<div>Failed</div>
Explanation
A comparison of a sequence to a single value is true when there is at least one value in the sequence that has the required magnitude relationship to the single value - see: https://www.w3.org/TR/2010/REC-xpath20-20101214/#id-general-comparisons.