On Thu, Aug 23 2018 at 17:26 +0100, unicode@unicode.org writes: > On Thu, 23 Aug 2018 17:39:15 +0200 > Philippe Verdy via Unicode <unicode@unicode.org> 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 -- , Janusz S. Bien emeryt (emeritus) https://sites.google.com/view/jsbien