[mpeg-OTspec] Updated 4th edition working draft available for review

[John Hudson]

Thanks, Peter. That's better in several respects.

Maybe the last sentence could say something like

     Applications should support use of a non-default language system table
     that is associated with 'DFLT' script, although older applications 
may not
     do so and might retain this behaviour.

I'd like to encourage everyone going forward to handle this in a 
consistent way, so not imply that this is something to opt out of.

JH


PS. With regard to the note, I wonder if we might be able to actually 
define recommended behaviour — not in this part of the spec, but 
somewhere — for handling of script=Common characters in OpenType Layout, 
so that we can get some kind of predictability? It's an area in which 
there's incompatibility between shaping engine implementations, which is 
very frustrating. In general, we'd do better if there were a singe 
standard for run itemisation.

cf. My IUC39 presentation
http://tiro.com/John/Hudson_IUC39_Beyond_Shaping.pdf


-- 

John Hudson
Tiro Typeworks Ltd    www.tiro.com
Salish Sea, BC        tiro at tiro.com

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