Comment by romeoblade

Apparently it is not. They have submitted it to the ietf. I will have to watch closely to see if librecalc/excel and languages/libraries adopt support. Seems like it does solve some common problems with CSV.

https://www.ietf.org/archive/id/draft-unicode-separated-valu...

https://datatracker.ietf.org/doc/draft-unicode-separated-val...