average Open Group document

@domi very informative

@domi my brain trying to do anything

@domi
> rationale: none

if they don't know why a function is in the standard, then what are they even doing?

The following sections are informative.

@domi

@domi hey how did you get my resume

@domi Group left Open as an exercise for the reader

@wolf480pl @domi Well… rationale sections in POSIX seem more there to give some explanation (like historical reasons) about the requirements rather than about mere inclusion.