 The common codomain in these cases \((\mathbf{C}\) in the general case and MonitSit in the example) works as a the core of a channel that connects two parts of the system. The core determines the correlations that obtain between the two parts, thus enabling information flow of the kind discussed in  section 2.2.  This is achieved via two kinds of links. On the one hand, two instances \(a\) from \(\mathbf{A}\) and \(b\) from \(\mathbf{B}\) can be thought to be connected via the channel if they are components of the same instance in \(\mathbf{C}\), so the instances of \(\mathbf{C}\) act as connections between components. Thus, in the radar example a particular screen will be connected to a particular plane if they belong to the same monitoring situation. 