I don't know exactly what was used, but I have used dia to make such things before. On Tue, Sep 14, 2004 at 02:24:02PM -0300, Jorge Godoy wrote: > [...] > > BTW, I got really interested on the tool used to draw the diagrams on > this page: > http://www.cosc.canterbury.ac.nz/~greg/python_gui/version/Doc/ownership.html