Btw. -- i will not put any more effort in that. I remember the first time that i got in contact with TZ database files including Theory, and i was on fire at a glance. I did not know many things that i've read even about my own country, Germany. You do not learn things like that, even on the academic high school (»Gymnasium«). And that is a real pity. But this yet shows up one of the problems that i would encounter; if done the *right* way, it would be necessary to add a lot of cross-references and cites etc., in a way that would be machine-parseable; i.e., just buy a book from Oxford University Press, like ``Ivanhoe'', and you know what i mean.. So this, if done *right*, would take a man year, or even more. If i would be a professor i think i would have students that would be hooked, though ... In general it's a pity that you learn years and years of 3rd Reich, after-war land reform and the »Defenestration of Prague«, but don't know what time it is in the end. --steffen