model.prepare();
Iterator<?> i = model.listDatatypeProperties();
while( i.hasNext() ) {
DatatypeProperty p = (DatatypeProperty) i.next();
Iterator<?> j = p.listRange();
while( j.hasNext() ) {
Resource range = (Resource) j.next();
assertTrue( TypeMapper.getInstance().getTypeByName( range.getURI() ) != null );
}
}