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POUse XSL to process a hierarchy from flat data structure
 

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    <p>Newbie question. I have to create a cross tab report like this: <PRE> SC TIN Total 3 2 South East 2 0 Gold Coast 2 0 North 1 2 Cairns 0 1 Townsville 1 1 </PRE></p> <p>using the (simplified) XML below:</p> <pre><code>&lt;DATASETLIST&gt; &lt;DATASET entity="SC"&gt; &lt;ROW&gt; &lt;District&gt;GOLD COAST&lt;/District&gt; &lt;Region&gt;SOUTH EAST&lt;/Region&gt; &lt;/ROW&gt; &lt;ROW&gt; &lt;District&gt;GOLD COAST&lt;/District&gt; &lt;Region&gt;SOUTH EASTERN&lt;/Region&gt; &lt;/ROW&gt; &lt;ROW&gt; &lt;District&gt;TOWNSVILLE&lt;/District&gt; &lt;Region&gt;NORTH&lt;/Region&gt; &lt;/ROW&gt; &lt;/DATASET&gt; &lt;DATASET entity="TIN"&gt; &lt;ROW&gt; &lt;District&gt;TOWNSVILLE&lt;/District&gt; &lt;Region&gt;NORTH&lt;/Region&gt; &lt;/ROW&gt; &lt;ROW&gt; &lt;District&gt;CAIRNS&lt;/District&gt; &lt;Region&gt;NORTH&lt;/Region&gt; &lt;/ROW&gt; &lt;/DATASET&gt; &lt;/DATASETLIST&gt; </code></pre> <p>I've actually got the main report working however the hierarchy is hardcoded (e.g. count SC's linked to "Gold Coast") but because of possible poor data, I could miss some nodes so I want to build a unique hierarchy based on the data, and then I can call my "count" template for each node.</p> <p>I've got to a point (see below) where I can produce a region-sorted list but it's not unique and the districts are not sorted within each region. I was thinking that I could somehow create a unique hierarchy variable and then process that with xsl:for-each logic.</p> <p>But I have no idea whether this is possible or the recommended method. It's possibly an extremely simple solution, but I have no idea how to go about it. Please any answers in simple (and clearly explained) terms thanks.</p> <pre><code>&lt;xsl:for-each select="//Region[not(Region=preceding-sibling::Region)]"&gt; &lt;xsl:sort select="."/&gt; &lt;xsl:for-each select="."&gt; &lt;xsl:value-of select="."/&gt; - &lt;xsl:for-each select="../District"&gt; &lt;xsl:value-of select="."/&gt;&lt;br/&gt; &lt;/xsl:for-each&gt; &lt;/xsl:for-each&gt; &lt;/xsl:for-each&gt; </code></pre>
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