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PONormalizing XML adjacency list model into HTML tree list
 

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  1. PONormalizing XML adjacency list model into HTML tree list
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    <p>I've seen examples of transforming "adjacency model" XML but none that will do it quite right for a ul/li bullet list. Could someone give me a hint? It would be great if the solution could support typical adjacency model requirements and deal with multiple level nesting/recursion.</p> <p>If the XML is:</p> <pre><code>&lt;?xml version="1.0" encoding="ISO-8859-1"?&gt; &lt;root&gt; &lt;row Id="2" Name="data" /&gt; &lt;row Id="3" Name="people" /&gt; &lt;row Id="4" Name="person" ParentId="3" /&gt; &lt;row Id="6" Name="folder" ParentId="2" /&gt; &lt;row Id="7" Name="thing" ParentId="3" /&gt; &lt;row Id="8" Name="web" /&gt; &lt;row Id="9" Name="link" ParentId="8" /&gt; &lt;/root&gt; </code></pre> <p>And I use something like:</p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"&gt; &lt;xsl:template match="/"&gt; &lt;ul id="someid" class="menu"&gt; &lt;xsl:apply-templates select="root/row[not(@ParentId)]"/&gt; &lt;/ul&gt; &lt;/xsl:template&gt; &lt;xsl:template match="row"&gt; &lt;ul&gt; &lt;li&gt; &lt;xsl:variable name="ID" select="@Id"/&gt; &lt;xsl:attribute name="rel"&gt; &lt;xsl:value-of select="@Id"/&gt; &lt;/xsl:attribute&gt; &lt;xsl:value-of select="@Name"/&gt; &lt;xsl:apply-templates select="//row[@ParentId=$ID]"/&gt; &lt;/li&gt; &lt;/ul&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>Then I get:</p> <pre><code>&lt;ul id="someid" class="menu"&gt; &lt;ul&gt; &lt;li rel="2"&gt; data&lt;ul&gt; &lt;li rel="6"&gt;folder&lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;/ul&gt; &lt;ul&gt; &lt;li rel="3"&gt; people &lt;ul&gt; &lt;li rel="4"&gt;person&lt;/li&gt; &lt;/ul&gt;&lt;ul&gt; &lt;li rel="7"&gt;thing&lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;/ul&gt; &lt;ul&gt; &lt;li rel="8"&gt; web&lt;ul&gt; &lt;li rel="9"&gt;link&lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;/ul&gt; &lt;/ul&gt; </code></pre> <p>Note the extra close/open ul tags between the "person" and "thing" li's- shouldn't be there. I can see why it's happening but just not sure how to change the code to fix it.</p> <p>Thanks.</p>
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    1. COWhat's the wanted output?
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    2. COIt's the list above but without the extra /ul ul tags between person and thing. I don't think that list is valid in HTML as long as those tags are there? i.e. the person and thing items are siblings and they are both children of the "people" item.
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    3. COThis does not make much difference to a browser, and it's correct. However you'll find in my answer the correct way to create a nested list.
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