Dire indeed!
added a fixed rdfxml test file to remove apparent errors.
     <owl:Class rdf:resource="Dead"/>
   replaced with
       <owl:allValuesFrom rdf:resource="Dead"/>.

     <rdfs:range
rdfs:Datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger"/>
   replaced with
     <rdfs:range
rdf:resource="http://www.w3.org/2001/XMLSchema#nonNegativeInteger"/>

  Axiom count in RIoTest reduced from 93 to 92.