Proposed new variant subtag: pre1917
Doug Ewell
doug at ewellic.org
Wed Sep 15 15:46:10 CEST 2010
Philip Newton <philip dot newton at gmail dot com> wrote:
> Remember that variant subtags may not be longer than eight characters;
> also, if they start with a digit, they must be followed by precisely
> three characters for a total length of four characters (and if they
> start with a letter, they must be followed by at least four characters
> for a minimum length of five characters).
This is a common misreading of the ABNF for variant subtags:
variant = 5*8alphanum ; registered variants
/ (DIGIT 3alphanum)
The first production -- 5*8 alphanum -- means that subtags 5 to 8
letters in length can begin with either a letter or a digit. So
whatever its other advantages or disadvantages might be, '1918orth' is
just as valid syntactically as 'orth1918'.
--
Doug Ewell | Thornton, Colorado, USA | http://www.ewellic.org
RFC 5645, 4645, UTN #14 | ietf-languages @ is dot gd slash 2kf0s
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