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    copied!<p><em>As pointed in the other answers, XPath cannot modify an XML document and produce new nodes</em>.</p> <p>Any node can participate in a node-set only once, due to the definition of <code>"set"</code>.</p> <p><strong>However, XPath 2.0 gives us the new <a href="http://www.w3.org/TR/xpath-datamodel/#sequences" rel="nofollow noreferrer">sequence type</a>,</strong> which allows items to be repeated.</p> <p>In order to have an element appearing twice in a sequence, one would just use <a href="http://www.w3.org/TR/xpath-functions/#func-concatenate" rel="nofollow noreferrer"><strong>the sequence concatenation operator <code>","</code></strong></a> as in the below expression:</p> <p><strong><code>/*/ElementYouWant, /*/ElementYouWant</code></strong></p> <p>Put this into an XSLT2.0 stylesheet as simple as this:</p> <pre><code>&lt;xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:f="http://fxsl.sf.net/" exclude-result-prefixes="f xs" &gt; &lt;xsl:output omit-xml-declaration="yes" indent="yes"/&gt; &lt;xsl:template match="/"&gt; &lt;t&gt; &lt;xsl:sequence select= "/*/ElementYouWant, /*/ElementYouWant"/&gt; &lt;/t&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>And apply this transformation on this XML document:</p> <pre><code>&lt;toplevel&gt; &lt;ElementYouWant&gt; &lt;SomeSubElement1&gt;specific data&lt;/SomeSubElement1&gt; &lt;SomeSubElement2&gt;specific data 2&lt;/SomeSubElement2&gt; &lt;/ElementYouWant&gt; &lt;/toplevel&gt; </code></pre> <p>to produce the wanted result:</p> <pre><code>&lt;t&gt; &lt;ElementYouWant&gt; &lt;SomeSubElement1&gt;specific data&lt;/SomeSubElement1&gt; &lt;SomeSubElement2&gt;specific data 2&lt;/SomeSubElement2&gt; &lt;/ElementYouWant&gt; &lt;ElementYouWant&gt; &lt;SomeSubElement1&gt;specific data&lt;/SomeSubElement1&gt; &lt;SomeSubElement2&gt;specific data 2&lt;/SomeSubElement2&gt; &lt;/ElementYouWant&gt; &lt;/t&gt; </code></pre> <p>Do note, that if one uses the <a href="http://www.w3.org/TR/xslt20/#element-sequence" rel="nofollow noreferrer"><strong><code>&lt;xsl:sequence&gt;</code></strong></a> instruction, no new copy of the <code>&lt;ElementYouWant&gt;</code> element is created -- therefore in XSLT 2.0 it is recommended to use <code>&lt;xsl:sequence&gt;</code> and to avoid using <a href="http://www.w3.org/TR/xslt#element-copy-of" rel="nofollow noreferrer"><strong><code>&lt;xsl:copy-of&gt;</code></strong></a> which creates (unnecessary) copies of nodes.</p>
 

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