Here's another datapoint:
http://www.mindswap.org/2004/owl/mindswappers#Aaron.Mannes

It's not even close to correct (look at the namespaces!).

The N3 Renderer has broken output with regards to owl:comlementOf, and possibly
others.
Take a class that has a restriction to be the intersection of Food and !Meat
(vegy-ontology). The N3 pane ends up reading:
 foodswap:VegetarianFood     a owl:Class;
      owl:intersectionOf     (
            foodswap:Food
            owl:complementOf
                      foodswap:Meat   ) ;
      owl:equivalentClass     foodswap:OvoLactoVegetarianFood;
      rdfs:subClassOf     foodswap:Food .