Re: simpleXML expressions

Another note about simpleXML.  In most of the examples that talk about 
using the XsltProcessor they say to use DomDocuments for the xml / xsl 
files.  However, I've noticed that you can also load the xml / xsl files 
into simpleXML objects.  I haven't tested this much, but everything has 
worked as I would expect so far (PHP5-RC3).  Are there any internal 
quirks which might make this A Bad Thing?

<?php

$xml = simpleXML_load_file('file.xml');
$xsl = simpleXML_load_file('file.xsl');
$proc = new XsltProcessor();
$proc->importStylesheet($xsl);
$doc = $proc->transformToDoc($xml);

?>