Cyc calls itself an ontology. Doesn't any AI need such an ontology to reason about the world?
Well, this would be an example of one of the projects that I think may teach us something. But if you are speaking of "an ontology," rather than just "ontology," you may be talking about some theory of relativized ontologies, but more likely you're not speaking about ontology in the same way as those who prioritize it over epistemology. Those who make epistemology primary still talk about things, they just disagree with the ontologists about complicated aspects of our relationship to the things and what our talk about the things means.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.