XmlRootElement to influence tag-name? Or how to get rid of <AbstractClasss xmlns:xsi="..." xsi:type="DocumentType">

From: Florian Bachmann <f.bachmann_at_micromata.de>
Date: Fri, 6 Mar 2009 13:44:56 +0100

Dear JAXB team,
I created a bunch of classes from the ogc kml-schema
(used by Google Earth and Google Maps and found here:
http://www.opengeospatial.org/standards/kml/ ).

So far so good, but as soon I want to marshal some objects into
an xml/kml-file I get this output:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:ns2="http://www.w3.org/2005/Atom
" xmlns:ns3="urn:oasis:names:tc:ciq:xsdschema:xAL:2.0">
     <AbstractFeatureGroup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance
" xsi:type="DocumentType">
         <name>testSNPN</name>
         <abstractFeatureGroup xsi:type="PlacemarkType">
             <name>P1</name>
             <AbstractGeometryGroup xsi:type="LineStringType">
                 <tessellate>true</tessellate>
                 <coordinates>-122.370533,37.823842,0</coordinates>
             </AbstractGeometryGroup>
         </abstractFeatureGroup>
     </AbstractFeatureGroup>
</kml>

but the produced output isn't readable by Google Earth.
Especially the <AbstractFeatureGroup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance
" xsi:type="DocumentType"> part, should be only <Document>
and the whole should be:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:ns2="http://www.w3.org/2005/Atom
" xmlns:ns3="urn:oasis:names:tc:ciq:xsdschema:xAL:2.0">
     <Document>
         <name>testSNPN</name>
         <Placemark>
             <name>P1</name>
             <LineString>
                 <tessellate>true</tessellate>
                 <coordinates>-122.370533,37.823842,0</coordinates>
             </LineString >
         </Placemark>
     </Document >
</kml>

So my question is it possible to affect the tag-name?
(From "DocumentType" to "Document" and the whole from
<AbstractFeatureGroup ... xsi:type="DocumentType"> direct into the type?

I tried to add @XmlRootElement() to each class
(@XmlRootElement("Document") to the DocumentType-class,
@XmlRootElement("Placemark") to the Placemarktype-class, ...)

but it doesn't seem to have any influence to the marshalled output.

Could anybody give me a hint, to get the desired output?

regards
Flori