An RFC document from 2011 about #vCards. The sex and gender part is quite interesting, I think. I'm wondering about the flexibility they had. I mean... 2011... I'm surprised.
"why does man print gimme gimme gimme at 00:30"
https://unix.stackexchange.com/questions/405783/why-does-man-print-gimme-gimme-gimme-at-0030#405874
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