#data
<metadata xmlns="http://www.w3.org/2000/svg">
  <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
    <rdf:Description rdf:about="foo">
      <foo xmlns="http://a/"/>
    </rdf:Description>
  </rdf:RDF>
</metadata>
#errors
/metadata;unknown element;u