Custom XML output format

Currently I have patched views-data-export.tpl.php to pipe the result through XSLTProcessor and a custom style-sheet instead of echoing. This is kind of dirty.

$style = '<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
   <xsl:output method="xml" encoding="UTF-8" cdata-section-elements="title teaser text" omit-xml-declaration="no" media-type="application/xml"/>
   <xsl:template match="nodes">[…]</xsl:template>
</xsl:stylesheet>';

$xslt = new XSLTProcessor();
$xslt->importStylesheet(new SimpleXMLElement($style));
echo $xslt->transformToXml(new SimpleXMLElement("$header\n$body\n$footer"));

Please explain how to create another "theme" for export, with additional entities in the header and custom names for the root and repetition entities (instead of "nodes" and "node") and the ability to declare some content CDATA.

Alternately, would you consider xsl-transform a configurable feature in the setup?

So that I do not forget: Thank You very much for the module! It is a very useful extension to drupal cms!

Kind regards

Peter