Private Use areas

Janusz S. Bień via Unicode unicode at
Thu Aug 23 13:34:20 CDT 2018

On Thu, Aug 23 2018 at 17:26 +0100, unicode at writes:
> On Thu, 23 Aug 2018 17:39:15 +0200
> Philippe Verdy via Unicode <unicode at> wrote:
>> You make a confusion: I do not propose "hacking" existing codes, but
>> instead adding new codes for private variations. It's then up to PUV
>> sequence authors to choose an appropropriate base character that can
>> have the properties they want to be inherited by the private-use
>> variation sequence, or to choose a base character that will provide
>> some reasonnable reading if rendererd as is (by renderers or fonts
>> not implementing the pricate viaration sequence, give nthat they will
>> also append a symbol for the PUV itself after the standard character).
> Variation sequences cannot be used to add new characters.  Most PUA
> characters are used to represent new characters.  A
> standard-conformant private variation sequence would generally achieve
> the same effect as could be achieved by a font feature (typically one
> of the cvxx, though possibly one of the ssxx),

This is a typical but IMHO obsolete perspective. Fonts are for
*rendering*, new characters and variants are more and more often needed
for *input* of real life old texts with sufficient precision.

Best regards


Janusz S. Bien
emeryt (emeritus)

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