I'm starting Derrida's "Writing and Difference" and have come across "ontological doube genitive" (Heidegger, I think, on the ontico-ontological difference between beings and Being). I'm curious because it sounds like like another term I know for the key distinction of subjectivity and objectivity from Gotthard Gunther's cybernetics "the Proemial Relation" [between 'relator'(relationship) and 'relatum'].