Transforming XML to XML

I have a very simple question about transforming XML to XML.  I have been using 
XSLT to transform XML to XHTML and displaying the result in Internet Explorer.  
I would like to do the same but with XML displayed in the browser.  A search of 
the archives has not provided a satisfactory solution.  Here is a simplified 
XML file, testdata.xml:

<?xml-stylesheet type="text/xsl" href="renewal.xsl"?>
<Data>
        <car>Chevy</car>
        <car>Dodge</car>
        <car>Ford</car>
</Data>

Here is a copy of my XSL file:

<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="xml" version="1.0" encoding="iso-8859-1" indent="yes"/>
<xsl:template match="/">
                <xsl:apply-templates select="Data"/>
</xsl:template>
</xsl:stylesheet>

> From what I have read and from some of the examples I have seen, I would 
> expect this to return an XML file exactly like the original document 
> (testdata.xml).  Instead it is displaying a string consisting of the text from 
> the <car> elements, without the XML tags: ChevyDodgeFord.  What am I 
> overlooking?
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