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POneed to merge xml nodes based on an attribute value
 

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  1. POneed to merge xml nodes based on an attribute value
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    <p>I need to merge certain xml nodes based on an attribute value, change that attribute value on the merged node and sum another attribute.</p> <p>I am able to change the value of the attributes, but I couldn't figure out how to sum(@count) and assign it to @count on the resulting xml</p> <p>Source xml</p> <pre><code>&lt;xml&gt; &lt;books category="X" count="2"&gt; &lt;book name="bookx1"/&gt; &lt;book name="bookx2"/&gt; &lt;/books&gt; &lt;books category="Y" count="3"&gt; &lt;book name="booky1"/&gt; &lt;book name="booky2"/&gt; &lt;book name="booky3"/&gt; &lt;/books&gt; &lt;books category="Z" count="2"&gt; &lt;book name="bookz1"/&gt; &lt;book name="bookz2"/&gt; &lt;/books&gt;&lt;/xml&gt; </code></pre> <p>After xslt transform it needs to be like this</p> <pre><code>&lt;xml&gt; &lt;books category="A" count="5"&gt; &lt;book name="bookx1"/&gt; &lt;book name="bookx2"/&gt; &lt;book name="booky1"/&gt; &lt;book name="booky2"/&gt; &lt;book name="booky3"/&gt; &lt;/books&gt; &lt;books category="Z" count="2"&gt; &lt;book name="bookz1"/&gt; &lt;book name="bookz2"/&gt; &lt;/books&gt;&lt;/xml&gt; </code></pre> <p>This is my partial xslt</p> <pre><code>&lt;xsl:transform version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output method="xml"/&gt; &lt;xsl:template match="*"&gt; &lt;xsl:element name="{local-name()}"&gt; &lt;xsl:apply-templates select="@*|node()"/&gt; &lt;/xsl:element&gt; &lt;/xsl:template&gt; &lt;xsl:template match="@*"&gt; &lt;xsl:copy-of select="."/&gt; &lt;/xsl:template&gt; &lt;xsl:template match="@category"&gt; &lt;xsl:attribute name="category"&gt; &lt;xsl:choose&gt; &lt;xsl:when test=".='X'"&gt; &lt;xsl:text&gt;A&lt;/xsl:text&gt; &lt;/xsl:when&gt; &lt;xsl:when test=".='Y'"&gt; &lt;xsl:text&gt;A&lt;/xsl:text&gt; &lt;/xsl:when&gt; &lt;xsl:when test=".='Z'"&gt; &lt;xsl:text&gt;B&lt;/xsl:text&gt; &lt;/xsl:when&gt; &lt;xsl:otherwise&gt; &lt;xsl:value-of select="."/&gt; &lt;/xsl:otherwise&gt; &lt;/xsl:choose&gt; &lt;/xsl:attribute&gt; &lt;/xsl:template&gt; &lt;xsl:template match="books[@category='X']"/&gt; &lt;xsl:template match="books[@category='Y']"/&gt;&lt;/xsl:transform&gt; </code></pre>
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    1. COBe sure to indent the entire code block, not just the first line.
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      1. USOwen S.
    2. COGood question (+1). See my answer for a short and simple solution. :)
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      1. USDimitre Novatchev
 

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