>>> Is it not possible to do a graph updated automaticaly ?

>> I don't think it is.

> It is possible

I was referring to the present situation where whoever can be bothered to do so posts his registration number with date into this thread in whatever format he feels like posting. In this situation, automatic updating of the graph would require periodically parsing this thread and the postings within, which I think is not likely to work given the known problems of having natural language processed algorithmically.