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@SuperDicq @nyx Yeah but very related, like in the standards that got absorbed by SUS, POSIX still remains, while XPG is like a ghost that only seems to remain for incrementing variables like XOPEN_VERSION (XSI indicator), and SVID seems to be long dead.

Also technically, SUS is POSIX with XSI, with Unix certification adding X/Open Curses as well.

(I've been working on OpenGroup's testsuite since march, I know the mess ^^)