If we are using ligatures in our apps, this isn't a problem. If someone wants 
to remove PUA glyphs, great! But this has no reason to block. 

----- Original Message -----

From: "Anne van Kesteren" <ann...@annevk.nl> 
To: "Wilson Page" <wilsonp...@mozilla.com> 
Cc: "Jonathan Kew" <j...@mozilla.com>, "Patryk Adamczyk" 
<padamc...@mozilla.com>, "John Daggett" <jdagg...@mozilla.com>, "b2g-internal" 
<b2g-inter...@mozilla.org>, "L. David Baron" <dba...@mozilla.com>, "Jaime Chen" 
<jac...@mozilla.com>, "Jonathan Watt" <jw...@mozilla.com>, "Jet Villegas" 
<j...@mozilla.com>, "Cameron McCormack" <hey...@gmail.com>, "Vivien" 
<vnico...@mozilla.com>, "sicking" <sick...@mozilla.com>, "Robert O'Callahan" 
<rocalla...@mozilla.com>, "mozilla.dev.platform group" 
<dev-platform@lists.mozilla.org> 
Sent: Tuesday, June 17, 2014 12:26:19 PM 
Subject: Re: Icon fonts in FxOS 

On Tue, Jun 17, 2014 at 1:19 PM, Wilson Page <wilsonp...@mozilla.com> wrote: 
> Maybe I'm late to the party, but I don't know what the PUA issue is? 

Code points carry semantics. If you assign meaning to unassigned code 
points through fonts, you have created a portability problem. That is, 
the font is required to make sense out of the code points. This was a 
problem with Emoji until it was standardized by Unicode. It would be 
good to avoid doing that again. 


-- 
http://annevankesteren.nl/ 

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