Does anyone know what “flavor” of #ABNF / #EBNF this is written in? The table heading says “EBNF,” while the paragraph above references “ABNF,” but it appears to use a format that’s different from what’s defined in RFC 5234 or ISO/IEC 14977:1996.

https://www.unicode.org/reports/tr35/#unicode-locale-identifier

I could make assumptions about some of these characters, but I’d rather be as explicit as possible.

#Unicode #CLDR #LDML #TR35