GRDDL service gives odd output for xsd:enumeration

I get this odd output from the GRDDL service; note
rdf:Description as a property:

<http://www.w3.org/2001/XMLSchema#enumeration>
    <http://www.rddl.org/purposes#normative-reference> [
        a <http://www.rddl.org/natures#Object>;
        <http://www.rddl.org/natures#natureKey> <http://www.w3.org/TR/xmlschema-2/#rf-facets>;
        <http://www.rddl.org/natures#target> <http://www.w3.org/TR/xmlschema-2/#rf-enumeration>
    ];
    rdf:Description [
        a <http://www.rddl.org/purposes#normative-reference>;
        <http://www.rddl.org/natures#Object> [
            a <http://www.rddl.org/natures#natureKey>;
            <http://www.rddl.org/natures#NatureKey> ""
        ]
    ] .

http://www.w3.org/2007/08/grddl/?docAddr=http%3A%2F%2Fwww.w3.org%2FXML%
2F2007%2F09%2FXMLSchema&output=turtleplain

 http://www.w3.org/2007/08/grddl/ v1.33 of 2007/09/10 08:57:21

The source document is
 http://www.w3.org/XML/2007/09/XMLSchema
  http://www.w3.org/XML/2007/09/XMLSchema.html
  Last-Modified 09/12/2007 07:46:18 AM says firefox

It refers to this transformation:
  http://www.w3.org/XML/2007/09/xsdns-grddl.xsl
  09/12/2007 08:24:45 AM

The resulting RDF/XML (via xsltproc) looks fine, to me;
see ,rddl.rdf attached. When run thru cwm, the turtle/n3 looks fine:

    XML:enumeration     rddlp:normative-reference  [
             a :Object;
             :natureKey <http://www.w3.org/TR/xmlschema-2/#rf-facets>;
             :target
<http://www.w3.org/TR/xmlschema-2/#rf-enumeration> ],
                 [
             a :Object;
             :natureKey <http://www.w3.org/TR/xmlschema-2/#element>;
             :target
<http://www.w3.org/TR/xmlschema-2/#element-enumeration> ] .

Any clues as to why the turtle from the GRDDL service is different?


-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/