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PO
 

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    <p>It's definitely not pretty, but basically you are looking at a limited number of string replace operations</p> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output method="html" encoding="utf-8" /&gt; &lt;xsl:variable name="ampDbl" select="'&amp;amp;amp;'" /&gt; &lt;xsl:variable name="amp" select="'&amp;amp;'" /&gt; &lt;xsl:variable name="ltDbl" select="'&amp;amp;lt;'" /&gt; &lt;xsl:variable name="lt" select="'&amp;lt;'" /&gt; &lt;xsl:variable name="gtDbl" select="'&amp;amp;gt;'" /&gt; &lt;xsl:variable name="gt" select="'&amp;gt;'" /&gt; &lt;xsl:template match="/"&gt; &lt;xsl:apply-templates select="//@data" mode="unescape" /&gt; &lt;/xsl:template&gt; &lt;xsl:template match="@data" mode="unescape"&gt; &lt;xsl:variable name="step1"&gt; &lt;xsl:call-template name="StringReplace"&gt; &lt;xsl:with-param name="s" select="string()" /&gt; &lt;xsl:with-param name="search" select="$ltDbl" /&gt; &lt;xsl:with-param name="replace" select="$lt" /&gt; &lt;/xsl:call-template&gt; &lt;/xsl:variable&gt; &lt;xsl:variable name="step2"&gt; &lt;xsl:call-template name="StringReplace"&gt; &lt;xsl:with-param name="s" select="$step1" /&gt; &lt;xsl:with-param name="search" select="$gtDbl" /&gt; &lt;xsl:with-param name="replace" select="$gt" /&gt; &lt;/xsl:call-template&gt; &lt;/xsl:variable&gt; &lt;xsl:variable name="step3"&gt; &lt;xsl:call-template name="StringReplace"&gt; &lt;xsl:with-param name="s" select="$step2" /&gt; &lt;xsl:with-param name="search" select="$ampDbl" /&gt; &lt;xsl:with-param name="replace" select="$amp" /&gt; &lt;/xsl:call-template&gt; &lt;/xsl:variable&gt; &lt;xsl:value-of select="$step3" disable-output-escaping="yes" /&gt; &lt;/xsl:template&gt; &lt;!-- generic string replace template --&gt; &lt;xsl:template name="StringReplace"&gt; &lt;xsl:param name="s" select="''" /&gt; &lt;xsl:param name="search" select="''" /&gt; &lt;xsl:param name="replace" select="''" /&gt; &lt;xsl:choose&gt; &lt;xsl:when test="contains($s, $search)"&gt; &lt;xsl:value-of select="substring-before($s, $search)" /&gt; &lt;xsl:value-of select="$replace" /&gt; &lt;xsl:variable name="rest" select="substring-after($s, $search)" /&gt; &lt;xsl:if test="$rest"&gt; &lt;xsl:call-template name="StringReplace"&gt; &lt;xsl:with-param name="s" select="$rest" /&gt; &lt;xsl:with-param name="search" select="$search" /&gt; &lt;xsl:with-param name="replace" select="$replace" /&gt; &lt;/xsl:call-template&gt; &lt;/xsl:if&gt; &lt;/xsl:when&gt; &lt;xsl:otherwise&gt; &lt;xsl:value-of select="$s" /&gt; &lt;/xsl:otherwise&gt; &lt;/xsl:choose&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>When applied to</p> <pre><code>&lt;root&gt; &lt;node data="&amp;amp;lt;div&amp;amp;gt;bla &amp;amp;amp;amp; bla&amp;amp;lt;/div&amp;amp;gt;" /&gt; &lt;/root&gt; </code></pre> <p>gives (in source code)</p> <pre><code>&lt;div&gt;bla &amp;amp; bla&lt;/div&gt; </code></pre> <p>which of course becomes this on screen:</p> <pre>bla &amp; bla</pre> <p>You might want to add a <code>step4</code> for <code>'&amp;amp;quot;'</code> to <code>'&amp;quot;'</code>.</p>
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    1. PODouble-unescaping raw HTML inside XSL?
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    1. COFWIW, I did the opposite operation (double-escaping output) a long time ago in [another answer](http://stackoverflow.com/a/2652733/18771)
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    2. COWow, you're right, it's not pretty, but it works :) Until someone can come up with a better way, going to mark this as the answer. Thanks!
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    3. CO@Amberite If your XSLT processor supports extension functions (like [EXSLT](http://www.exslt.org/) or one of the proprietary extension methods, like the one .NET provides or the MSXSL script extensions) then you might be able to off-load the heavy lifting to an external routine that is better-suited for string processing and HMTL parsing. The above is the vanilla XSLT 1.0 method. If you have more than vanilla XSLT 1.0., by all means make use of it.
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