code: void writeSomeValueRestriction(String propertyUri, String rangeUri,
  			Resource bnode) throws RDFHandlerException {
  		this.rdfWriter.writeTripleValueObject(bnode, RdfWriter.RDF_TYPE,
  				RdfWriter.OWL_RESTRICTION);
  		this.rdfWriter.writeTripleUriObject(bnode, RdfWriter.OWL_ON_PROPERTY,
  				propertyUri);
  		this.rdfWriter.writeTripleUriObject(bnode,
  				RdfWriter.OWL_SOME_VALUES_FROM, rangeUri);
  	}
docs: Writes a buffered some-value restriction.
  
  @param propertyUri
  URI of the property to which the restriction applies
  @param rangeUri
  URI of the class or datatype to which the restriction applies
  @param bnode
  blank node representing the restriction
  @throws RDFHandlerException
  if there was a problem writing the RDF triples