(Also, I know I've asked this question before, but why is a variant subtag beginning with a digit listed as consisting of exactly one digit plus 3 alphanumerica characters in the list mentioned above?? (par 3):"variant = 5*8alphanum ; registered variants / (DIGIT 3alphanum)",and then just a paragraph down [par 5? or 4?] a variant beginning with a digit is described as having a length of 4-8 characters:"There is a subtlety in the ABNF production 'variant': a variant starting with a digit has a minimum length of four characters,
While this is true, I think deleting the word "minimum" here would fix the problem.
while those starting with a letter have a minimum length of five characters." ??)
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