What does starting much higher up in the PUA chain means? PUA is PUA right?

On Tue, Sep 9, 2014 at 2:30 PM, Shahyar Ghobadpour <
[email protected]> wrote:

> We can avoid the PUA areas that are commonly used for emoji, and start
> much higher up the PUA chain. That's the best we can do, and should work
> for pretty much everything.
>
> --Shahyar
>
> On Mon, Aug 25, 2014 at 5:35 PM, Matthew Flaschen <[email protected]
> > wrote:
>
>> On 08/22/2014 02:17 PM, Shahyar Ghobadpour wrote:
>>
>>> I'm chiming in late here, but our icons are in the PUA, and therefore
>>> have nothing to actually "read". aria-hidden is not necessary in this
>>> scenario; it is only needed when you are using unicode characters that
>>> can be read by a screen reader as something (eg. the caret glyph is read
>>> as "n-ary logical and"), but don't want it to because it is ornamental.
>>>
>>
>> One potential issue they discuss for PUA is:
>>
>> "Using the PUA avoids semantic conflicts, but that still leaves us with
>> visual ones. For example, some operating system default fonts define their
>> own characters in the PUA. If any of your icons are mapped to a character
>> with a default glyph and the font request doesn’t successfully complete,
>> the default glyph will be shown."
>>
>> I don't know how real an issue this is (they discuss an apparent
>> real-world example on iOS).  Might there be a noticeable number of failed
>> font requests on mobile?  Are we avoiding the no-go areas of the PUA?
>>
>>
>> Matt Flaschen
>>
>>
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