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    <p>Using a standard grouping technique, you need just two templates (no loops, no params):</p> <ul> <li>Use a <em>composite key</em> to collect <strong>CONTACT</strong> by <strong>FirstName</strong> and <strong>SecondName</strong>.</li> <li>Then apply the templates to one single <strong>CONTACT</strong> for each group.</li> <li>Finally, retrieve the <strong>Email</strong> nodes from the key.</li> </ul> <hr> <p>Your final transform:</p> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:key name="k_Contacts" match="CONTACTS/CONTACT" use="concat(FirstName,LastName)"/&gt; &lt;xsl:template match="CONTACTS"&gt; &lt;xsl:copy&gt; &lt;xsl:apply-templates select="CONTACT[generate-id()= generate-id(key('k_Contacts',concat(FirstName,LastName))[1])]"/&gt; &lt;/xsl:copy&gt; &lt;/xsl:template&gt; &lt;xsl:template match="CONTACT"&gt; &lt;xsl:copy&gt; &lt;xsl:copy-of select="FirstName | LastName"/&gt; &lt;xsl:copy-of select="key('k_Contacts',concat(FirstName,LastName)) /Email"/&gt; &lt;/xsl:copy&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <hr> <p>In XSLT 2.0 you can use <code>xsl:for-each-group</code>; just replace </p> <pre><code>&lt;xsl:apply-templates select="CONTACT[generate-id()= generate-id(key('k_Contacts',concat(FirstName,LastName))[1])]"/&gt; </code></pre> <p>with:</p> <pre><code> &lt;xsl:for-each-group select="CONTACT" group-by="concat(FirstName,LastName)"&gt; &lt;xsl:apply-templates select="current-group()[1]"/&gt; &lt;/xsl:for-each-group&gt; </code></pre>
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    1. POGrouping and merging of two contacts in XSLT1.0
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    1. USEmiliano Poggi
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    1. COThis information is so useful. I thank you very much.
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    2. COOne question, <CONTACT> <FirstName>Arun</FirstName> <LastName>Neelam</LastName> <Email>nuraaa_iceee@yahoo.co.in</Email></CONTACT> <CONTACT><FirstName>Arun</FirstName> <LastName>Arun_Neelam</LastName> <Email>nuraaa_iceee@gmail.com</Email></CONTACT> Here, these two are belongs to the same person but slight difference in the name. How we can merge these two contacts? Thank you.
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    3. COThat would change the transform in relevant way. Are you still searching for an answer to the question? I've just provided an alternative to the others.
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      1. USEmiliano Poggi
 

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