on
among three roles of players or domains of components,
and so defining all of them in relation to each other.

JM:  Now you say that the sign relation is a cartesian product &lt;O,S,I&gt;?

No, I say that a sign relation L is a subset of a cartesian product OxSxI.
At least, that is what I say on extensional days, which is most days of late.

JM:  so you have three sets: O, S, and I and the cartesian product
     is O x S x I = {(o, s, i) | o is in O, s is in S, i is in I}, i.e.
     all possible combinat