While the implications are huge, it is hard to think about what is actually being done. XML and JSON are just languages, and the type of information could be stored in any number of ways.
In my point of view, the problem here is that you could say something like "'water' and 'heat' produces 'steam'", but knowledge is never that simple, and understanding of that information is even more complicated.
I would think that Abstract Wikipedia is not the first people trying to solve such a problem, and I am very curious to see what they come up with.
