[grault]

I'd expect to see something like this in the FAQ section: How is it possible to diff/merge Skov program soucre trees?

Just asking, it's definitely possible. I used to work at a CAD company, they did some dev work to do these with building models...

[nicolas-p]

Ideally, Skov would need an integrated version control system that understands the visual code.

But now, all you can do is export your code to text files (Ctrl+S) and use traditional text-based diff/merge/version control tools.

[DonaldFisk]

This is the right answer, at least for visual dataflow. It should be done by diff/merge of graphs, displayed visually, not by converting it into a text-based format and using something like git, Perforce, or cvs. Dataflow can be expressed textually, but you'd have a hard time following the code.