EMF Compare 2 aims at providing a full-fledged diagram comparison (for "pure" GMF diagrams as well as diagrams created with GMF-based tools such as Papyrus or EcoreTools). The 2.1.0M5 build (installable from this update site includes a preview of this feature (functional comparison and merge), though the way we display the differences in the diagrams themselves is not finalized:
We have initiated a thorough reflection on how all these differences would be best displayed in their context; the current state of the specification can be consulted on the eclipse wiki.
This draft includes a number of choices from our end that are subject to discussion : we have opted to use the default "team" colors (as they show in the difference icon overlays), we wish to highlight the whole graphical Figure in this color, we aim at creating "phantoms" of the added/deleted objects...
This thread was initiated to be a starting point for discussions or opinions on this. If you believe that the differences would be best shown some other way, or if you think some of the differences we expect to graphically represent should simply be omitted from the comparison view, please contribute you thought .