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File: Data.xml
<?xml version="1.0" standalone="yes"?>
<poem author="jm" year="1667">
<verse>line 1</verse>
<verse>line 2</verse>
<verse>line 3</verse>
<verse>line 4</verse>
</poem>
File: Transform.xslt
<?xml version="1.0" standalone="yes"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:output method="text" />
<xsl:template match="poem">
<xsl:if test="count(verse) > 3">
The poem has more than 3 verse child elements.
</xsl:if>
</xsl:template>
</xsl:stylesheet>
Output:
The poem has more than 3 verse child elements.
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