It's "mostly the same but lowercased yet with some exceptions", see https://github.com/behdad/harfbuzz/blob/master/src/hb-ot-tag.cc
Sent from my mobile phone. > On 07.05.2015, at 00:26, Arthur Reutenauer <[email protected]> > wrote: > > On a related issue, it has always seemed to me that script tags in > OpenType were identical to ISO 15924 - much unlike language tags, that > differ a lot from any part of ISO 639. I'll have a closer look and will > compile a list for anyone who's interested. > > Best, > > Arthur
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