#data
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns="http://ff/">
  <rdf:Description rdf:about="">
    <foo>a</foo>
    <xml>aa</xml>
  </rdf:Descriotion>
</rdf:RDF>
#errors

#data
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns="http://ff/">
  <rdf:Description rdf:about="">
    <foo>a</foo>
    <xmlabc>aa</xmlabc>
  </rdf:Descriotion>
</rdf:RDF>
#errors

#data
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns="http://ff/">
  <rdf:Description rdf:about="">
    <foo>a</foo>
    <xml:abc>aa</xml:abc>
  </rdf:Descriotion>
</rdf:RDF>
#errors

#data
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns="http://ff/" xmlns:xmla="https://x/">
  <rdf:Description rdf:about="">
    <foo>a</foo>
    <xmla:bc>aa</xmla:bc>
  </rdf:Descriotion>
</rdf:RDF>
#errors

#data
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns="http://ff/" xmlns:x="https://x/">
  <rdf:Description rdf:about="">
    <foo>a</foo>
    <x:xmlabc>aa</x:xmlabc>
  </rdf:Descriotion>
</rdf:RDF>
#errors