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    <p><strong>This is a <em>two-pass</em> transformation that produces the wanted result</strong>:</p> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:ext="http://exslt.org/common" exclude-result-prefixes="ext"&gt; &lt;xsl:output omit-xml-declaration="yes" indent="yes"/&gt; &lt;xsl:strip-space elements="*"/&gt; &lt;xsl:template match="@*|node()" name="identity"&gt; &lt;xsl:copy&gt; &lt;xsl:apply-templates select="@*|node()" /&gt; &lt;/xsl:copy&gt; &lt;/xsl:template&gt; &lt;xsl:template match="/"&gt; &lt;xsl:variable name="vrtfPass1"&gt; &lt;xsl:apply-templates/&gt; &lt;/xsl:variable&gt; &lt;xsl:variable name="vPass1" select="ext:node-set($vrtfPass1)/*"/&gt; &lt;xsl:apply-templates select="$vPass1" mode="pass2"/&gt; &lt;/xsl:template&gt; &lt;xsl:template match="content"&gt; &lt;wrapper&gt; &lt;replace /&gt; &lt;xsl:apply-templates select="@*|node()" /&gt; &lt;/wrapper&gt; &lt;/xsl:template&gt; &lt;xsl:template match="replace"&gt; &lt;xsl:text&gt;&amp;#xA;Hello world&amp;#xA;&lt;/xsl:text&gt; &lt;/xsl:template&gt; &lt;xsl:template match="@*|node()" mode="pass2"&gt; &lt;xsl:call-template name="identity"/&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p><strong>When applied on the provided XML document</strong>:</p> <pre><code>&lt;example&gt; &lt;content&gt;Lorem ipsum&lt;/content&gt; &lt;content&gt;&lt;replace /&gt;&lt;/content&gt; &lt;/example&gt; </code></pre> <p><strong>the wanted, correct result is produced</strong>:</p> <pre><code>&lt;example&gt; &lt;wrapper&gt; Hello world Lorem ipsum&lt;/wrapper&gt; &lt;wrapper&gt; Hello world Hello world &lt;/wrapper&gt; &lt;/example&gt; </code></pre> <p><strong>Do note</strong>:</p> <p>In XSLT 1.0 the result of applying templates is of the infamous type RTF (Result Tree Fragment) and by definition it cannot be further accessed and processed, except using <code>xsl:copy-of</code> and the standard string functions.</p> <p>This is why almost every XSLT 1.0 processor provides a vendor-specific extension function <code>xxx:node-set()</code> that takes an RTF and converts it to a "regular" tree whoce descendants can be accessed using any XPath expression. Here the <code>xxx</code> prefix must be bound to a vendor-specifix namespace-uri.</p> <p>The EXSLT <code>ext:node-set()</code> is implemented by most XSLT processors -- thus its use guarantees significant degree of portability among different XSLT processors.</p> <p><strong>For an additional multi-pass transformation example, see this</strong>:</p> <p><a href="https://stackoverflow.com/a/3200026/36305">https://stackoverflow.com/a/3200026/36305</a></p> <p><strong>and this</strong>:</p> <p><a href="http://www.dpawson.co.uk/xsl/sect1/N169.html#d860e392" rel="nofollow noreferrer">http://www.dpawson.co.uk/xsl/sect1/N169.html#d860e392</a></p>
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    1. POReapplying templates to output of other templates in XSLT
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    1. USDimitre Novatchev
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    1. COAn interesting technique! But is there a way out, if I do not know in advance, how many passes will be necessary?
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    2. CO@hielsnoppe, Yes, and this is called *recursion*. Each step of the recursion produces the result from the current pass and passes it to the next pas. Whenever your stop condition is met, the recursion will end.
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    3. COYes, I thought about using some kind of recursion, but could not figure out how at my current task. I will keep on trying, especially to find a proper stop condition, which would have to be some expression for "nothing has changed in the current pass".
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