Your not the first to ask for it, so I guess I'll have to figure it out.
> $10 if it could export UML or some kind of XML definition
Interesting. One of the features I plan to work on this week is export & import of source files. My first plan is to 'brute force' it, and export a .json file with a attributes for each cell in the grid. But could also be yml, or even XML I guess.