  Aristotle’s discussion in the Categories influences the development of medieval views about relations in several discernible ways. First of all, it introduces the basic framework and terminology that comes to dominate all medieval theorizing about relations. Second, and perhaps most importantly, it articulates the main claims in response to which medieval philosophers develop their own views, including each of the following: (1) relations are the items that relate substances, (2) the items that relate substances are accidents, and (3) no substance is a relation.