“There is a great deal of philosophy involved in working with Topic Maps. Not in the sense of arguing for extentionalism or purport a theory of when cats die in boxes, but in the sense of epistemology, the philosophy of learning. It is about how we perceive things, how human cognition works, about how we label things, how we categorise and find our way in the vast information layer between our brains and our tools.” (Alexander Johannesen) – courtesy of column two