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    copied!<p><strong>Here is an example of multi-pass transformation within a browser</strong>:</p> <p><strong>Let us have this source XML document</strong>:</p> <pre><code>&lt;?xml-stylesheet title="XSL_formatting" type="text/xsl" href="MultiPassBrowser.xsl"?&gt; &lt;nums&gt; &lt;num&gt;01&lt;/num&gt; &lt;num&gt;02&lt;/num&gt; &lt;num&gt;03&lt;/num&gt; &lt;num&gt;04&lt;/num&gt; &lt;num&gt;05&lt;/num&gt; &lt;num&gt;06&lt;/num&gt; &lt;num&gt;07&lt;/num&gt; &lt;num&gt;08&lt;/num&gt; &lt;num&gt;09&lt;/num&gt; &lt;num&gt;10&lt;/num&gt; &lt;/nums&gt; </code></pre> <p><strong>Let us have these two XSLT transformations</strong>:</p> <h1>MultiPassBrowser1.xsl</h1> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output omit-xml-declaration="yes" indent="yes"/&gt; &lt;xsl:strip-space elements="*"/&gt; &lt;xsl:template match="node()|@*"&gt; &lt;xsl:copy&gt; &lt;xsl:apply-templates select="node()|@*"/&gt; &lt;/xsl:copy&gt; &lt;/xsl:template&gt; &lt;xsl:template match="num/text()"&gt; &lt;xsl:value-of select=". *2"/&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>and</p> <h1>MultiPassBrowser2.xsl</h1> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output omit-xml-declaration="yes" indent="yes"/&gt; &lt;xsl:strip-space elements="*"/&gt; &lt;xsl:template match="node()|@*" mode="pass2"&gt; &lt;xsl:copy&gt; &lt;xsl:apply-templates select="node()|@*" mode="pass2"/&gt; &lt;/xsl:copy&gt; &lt;/xsl:template&gt; &lt;xsl:template match="num" mode="pass2"&gt; &lt;p&gt;&lt;xsl:value-of select=". +1"/&gt;&lt;/p&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>The first transformation copies the XML document "as-is", but with the string value of every <code>num</code> element multiplied by 2.</p> <p>The second transformation copies the XML document "as-is", but with the string value of every <code>num</code> element incremented.</p> <p>If the second transformation is applied on the result of the first, the final values, obtained from the initial <code>num</code> elements must be 3, 5, 7, ..., 21.</p> <p><strong>Here is the transformation that glues these two together</strong>:</p> <h1>MultiPassBrowser.xsl</h1> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:ext="http://exslt.org/common" xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="ext msxsl"&gt; &lt;xsl:import href="file:///C:/Temp/delete/MultiPassBrowser1.xsl"/&gt; &lt;xsl:import href="file:///C:/Temp/delete/MultiPassBrowser2.xsl"/&gt; &lt;xsl:output method="html"/&gt; &lt;xsl:strip-space elements="*"/&gt; &lt;msxsl:script language="JScript" implements-prefix="ext"&gt; this['node-set'] = function (x) { return x; } &lt;/msxsl:script&gt; &lt;xsl:template match="/"&gt; &lt;html&gt; &lt;xsl:variable name="vrtfPass1"&gt; &lt;xsl:apply-templates select="/*"/&gt; &lt;/xsl:variable&gt; &lt;xsl:apply-templates select="ext:node-set($vrtfPass1)/*/*" mode="pass2"/&gt; &lt;/html&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p><strong>The result, when the XML file is opened with both IE, Firefox, Safari and Opera, is the correct, expected one</strong>:</p> <pre><code>&lt;html&gt; &lt;p&gt;3&lt;/p&gt; &lt;p&gt;5&lt;/p&gt; &lt;p&gt;7&lt;/p&gt; &lt;p&gt;9&lt;/p&gt; &lt;p&gt;11&lt;/p&gt; &lt;p&gt;13&lt;/p&gt; &lt;p&gt;15&lt;/p&gt; &lt;p&gt;17&lt;/p&gt; &lt;p&gt;19&lt;/p&gt; &lt;p&gt;21&lt;/p&gt; &lt;/html&gt; </code></pre> <p><strong>Explanation</strong>:</p> <ol> <li><p>The primary stylesheet module (the one referenced in the XML document PI) imports the two stylesheet modules that contain the separate transformations.</p></li> <li><p>The result of the first transformation is captured in the variavle <code>$vrtfPass1</code>.</p></li> <li><p>In XSLT 1.0 such variable is of the infamous "RTF" (Result Tree Fragment) type and cannot be operated directly (only copying and the <code>string()</code> function can be used on an RTF). Here we use a portable variant of the <code>xxx:node-set()</code> extension function, that works both in IE and in the other four major browsers. <strong>This portable extension was first proposed by @DavidCarlisle and the original can be found in <a href="http://dpcarlisle.blogspot.com/2007_05_01_archive.html" rel="nofollow">his blog</a></strong>.</p></li> <li><p>Templates in mode "pass2" are then applied on the node-set, to which we converted, in the step above, the RTF variable. All templates in the second imported stylesheet module are in mode "pass2", thus they are selected for execution.</p></li> <li><p>The final result is produced.</p></li> </ol>
 

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