A proposed UML model for the interaction-viewer.
It should be considered a model of the diagram (the graphical output) not a model of the data. I.e. a Link is the graphical representation of one or many interactions, not an interaction itself. Object types contain attributes for the SVG elements that represent it (these attributes not currently shown in diagram).
I know there are some thing that will strike people as odd, e.g. why does BinaryLink contain a collection of SequenceLinks but UnaryLink does not? We can discuss later and I'll try to explain (its to do with cooperative interactions), it may be a mistake..
