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    copied!<p>Assuming you want to check the value of the current footnote <code>text()</code> against previous footnote <code>text()'s</code> for uniqueness, then you can just check the <code>preceding-sibling::node()'s text()</code>:</p> <pre><code>&lt;xsl:if test="$string = preceding-sibling::node()/text()"&gt; </code></pre> <p>e.g.</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" &gt; &lt;xsl:output omit-xml-declaration="yes" method="xml" version="1.0" indent="yes" /&gt; &lt;xsl:template match="/xml"&gt; &lt;xml&gt; &lt;xsl:apply-templates select="footnote" /&gt; &lt;/xml&gt; &lt;/xsl:template&gt; &lt;xsl:template match="footnote"&gt; &lt;xsl:variable name = "string"&gt; &lt;xsl:value-of select="./text()"/&gt; &lt;/xsl:variable&gt; &lt;xsl:variable name = "bool"&gt; &lt;xsl:if test="$string = preceding-sibling::node()/text()"&gt; &lt;xsl:text&gt;false&lt;/xsl:text&gt; &lt;/xsl:if&gt; &lt;/xsl:variable&gt; &lt;xsl:if test="$bool != 'false'"&gt; &lt;xsl:copy-of select="."&gt;&lt;/xsl:copy-of&gt; &lt;/xsl:if&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>Will turn the input:</p> <pre><code>&lt;xml&gt; &lt;footnote&gt; someVal &lt;/footnote&gt; &lt;footnote&gt; anotherVal &lt;/footnote&gt; &lt;footnote&gt; anotherVal &lt;/footnote&gt; &lt;footnote&gt; newVal &lt;/footnote&gt; &lt;/xml&gt; </code></pre> <p>Into:</p> <pre><code>&lt;xml&gt; &lt;footnote&gt; someVal &lt;/footnote&gt; &lt;footnote&gt; anotherVal &lt;/footnote&gt; &lt;footnote&gt; newVal &lt;/footnote&gt; &lt;/xml&gt; </code></pre> <p>You should also look at Muenchian grouping if your intention is to identify groups within elements.</p>
 

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