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    <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output method="xml" indent="yes"/&gt; &lt;xsl:template match="/"&gt; &lt;Target Sum="{sum(FOO/BAR)}" /&gt; &lt;/xsl:template&gt; </code></pre> <p></p> <p><strong>EDIT:</strong></p> <p>This is a bit verbose, and there is probably a more elegant way to do it, but essentially I have a named template here that recursively calls itself to calculate the sum after the hard-coded mapping occurs:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output method="xml" indent="yes"/&gt; &lt;xsl:template match="/"&gt; &lt;Target&gt; &lt;xsl:attribute name="Sum"&gt; &lt;xsl:call-template name="GetSum"&gt; &lt;xsl:with-param name="CurrentNode" select="FOO/BAR[position()=1]"/&gt; &lt;/xsl:call-template&gt; &lt;/xsl:attribute&gt; &lt;/Target&gt; &lt;/xsl:template&gt; &lt;xsl:template name="GetSum"&gt; &lt;xsl:param name="CurrentNode"/&gt; &lt;xsl:param name="Number" select="0"/&gt; &lt;xsl:variable name="Recursive_Result"&gt; &lt;xsl:variable name="MappedNumber"&gt; &lt;xsl:choose&gt; &lt;xsl:when test="$CurrentNode/. = 'x'"&gt;1&lt;/xsl:when&gt; &lt;xsl:when test="$CurrentNode/. = 'y'"&gt;2&lt;/xsl:when&gt; &lt;xsl:when test="$CurrentNode/. = 'z'"&gt;3&lt;/xsl:when&gt; &lt;xsl:otherwise&gt;0&lt;/xsl:otherwise&gt; &lt;/xsl:choose&gt; &lt;/xsl:variable&gt; &lt;!-- if there is a next sibling, recursively call GetSum --&gt; &lt;xsl:choose&gt; &lt;xsl:when test="$CurrentNode/following-sibling::BAR[1]"&gt; &lt;xsl:call-template name="GetSum"&gt; &lt;xsl:with-param name="CurrentNode" select="$CurrentNode/following-sibling::BAR[1]"/&gt; &lt;xsl:with-param name="Number"&gt; &lt;xsl:value-of select="$MappedNumber"/&gt; &lt;/xsl:with-param&gt; &lt;/xsl:call-template&gt; &lt;/xsl:when&gt; &lt;xsl:otherwise&gt; &lt;xsl:value-of select="$MappedNumber"/&gt; &lt;/xsl:otherwise&gt; &lt;/xsl:choose&gt; &lt;/xsl:variable&gt; &lt;!-- add the recursive_result to the number passed into the template. this will eventually build a sum --&gt; &lt;xsl:value-of select="$Recursive_Result + $Number"/&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre>
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    1. COBrad, thanks for the quick answer. That does the trick if X, Y and Z were actually numbers in the source document, but they are actually the letters. So I need to map them first. How do I do that? Thanks, -J
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    2. COahh - I see what you mean - my fault, I misunderstood. Where is X, Y and Z? Are those nodes that are in the source document somehwere?
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    3. COYes. They are the text nodes of <BAR/> depending on what the actual value at runtime is, i need to be able to map them to numerical value and then sum them. I can tranlate them to a numerical value using a template, but I guess I don't know how to sum the results that I get from a template. Make sense?
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