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    <p>If the input XML can be mapped to your XML format in a straight-forward way, then a set of XPath expressions would be required from the user.</p> <p>By "straight-forward way" I mean a very basic <code>&lt;xsl:apply-templates&gt;</code> approach. The input XML must have individual records that can be addressed unambiguously, containing all the data in the right format. No data would require calculating or other special processing any more complex than what can be achieved by the evaluation of a single XPath expression.</p> <p>If the input is:</p> <pre><code>&lt;root&gt; &lt;entry id="1" name"foo"&gt; &lt;data1&gt;somevalue &lt;data2&gt;othervalue&lt;/data2&gt; &lt;/data1&gt; &lt;/entry&gt; &lt;/root&gt; </code></pre> <p>and your desired output would be:</p> <pre><code>&lt;records&gt; &lt;record&gt; &lt;id&gt;1&lt;/id&gt; &lt;name&gt;foo&lt;/name&gt; &lt;data1&gt;somevalue&lt;/data1&gt; &lt;data2&gt;othervalue&lt;/data2&gt; &lt;/record&gt; &lt;/records&gt; </code></pre> <p>then the user would have to provide the following mappings:</p> <ul> <li>root element: "root"</li> <li>record element: "entry"</li> <li>id: "@id"</li> <li>name: "@name"</li> <li>data1: "data1"</li> <li>data2: "data1/data2"</li> </ul> <p>and the XSLT would be something like this (the values in "%" are to be replaced by the actual XPath expressions from the above mapping configuration):</p> <pre><code>&lt;xsl:template match="/"&gt; &lt;records&gt; &lt;xsl:apply-templates select="%root element%/%record element%" /&gt; &lt;/records&gt; &lt;/xsl:template&gt; &lt;xsl:template match="%root element%/%record element%"&gt; &lt;record&gt; &lt;id&gt; &lt;xsl:value-of select="%id-xpath%[1]" /&gt; &lt;/id&gt; &lt;name&gt; &lt;xsl:value-of select="%name-xpath%[1]" /&gt; &lt;/name&gt; &lt;!-- and so on --&gt; &lt;/record&gt; &lt;/xsl:template&gt; </code></pre>
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    1. POHow can I allow for user definable XML file formats?
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