On May 4, 2025 at 6:44:28 PM, Martin J. Dürst <duerst@xxxxxxxxxxxxxxx> wrote:
Regarding upgrading software such as language implementations, using
particular Unicode versions is a must if your regular expressions go
beyond "." and allow the use of properties (see e.g.
https://ruby-doc.org/3.4.1/Regexp.html#class-Regexp-label-Unicode).
There’s a long and interesting discussion to have about this. I hear what you’re saying, but on the other hand I have the impression that what most developers want is “the latest version”. I suppose there are situations where an application might want to lock itself to a particular previous version? Or require version X-or-higher? Should there be an API for all this stuff?
Annoyingly, https://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt doesn’t self-identity its version.
-T
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