Re: [precis] names and usernames
John C Klensin <john-ietf@jck.com> Sun, 12 February 2017 23:43 UTC
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Date: Sun, 12 Feb 2017 18:43:24 -0500
From: John C Klensin <john-ietf@jck.com>
To: Peter Saint-Andre <stpeter@stpeter.im>, precis@ietf.org
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Subject: Re: [precis] names and usernames
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Peter, Just to be clear to you and the WG, I don't have a strong opinion about what decision the WG should make in these cases, but I do believe the decision must be explicit and the result of discussion, not something that happens as an accident without knowledge of the relevant cases. best, john --On Sunday, February 12, 2017 16:29 -0700 Peter Saint-Andre <stpeter@stpeter.im> wrote: > John Klensin has brought to my attention that it is currently > impossible to represent some people's names in PRECIS > usernames because some of the relevant Unicode code points are > disallowed by the IdentifierClass defined in RFC 7564 (and > thus by the UsernameCaseMapped and UsernameCasePreserved > profiles defined in RFC 7613). > > First, RFC 7564 disallows "default ignorable" code points in > the IdentifierClass. However, as I understand it some of these > code points are need to represent characters in names that > might be desirable to people living within communities that > use Indic script and eastern Arabic script (e.g., Persian and > writing systems derived from Persian). In particular, the > Unicode Standard specifies that ZWJ and ZWNJ are "default > ignorable" and it seems that these code points are especially > important in this context. > > Second, apparently some Chinese family names are typically > written (especially outside the People's Republic of China) > using characters that the Unicode Consortium assigns to > non-BMP code points, or assigns in the BMP but as > compatibility decomposable characters (and thus disallowed by > RFC 7564 in the IdentifierClass). > > I'm not sure whether we can solve these problems > (internationalization is messy and we've never tried to > guarantee that any particular name or preferred string could > be represented in PRECIS usernames), but input from people > with a deeper understanding of these issues would be > appreciated. I have attempted to reach out to relevant > experts, and will report back to this list with any findings. > > In the meantime, I plan to submit revised I-Ds addressing > other issues with the PRECIS specifications sometime this > evening. > > Peter > > _______________________________________________ > precis mailing list > precis@ietf.org > https://www.ietf.org/mailman/listinfo/precis
- Re: [precis] names and usernames John C Klensin
- [precis] names and usernames Peter Saint-Andre
- Re: [precis] names and usernames Peter Saint-Andre
- Re: [precis] names and usernames Florian Zeitz
- Re: [precis] names and usernames Peter Saint-Andre
- Re: [precis] names and usernames Peter Saint-Andre
- Re: [precis] names and usernames Peter Saint-Andre
- Re: [precis] names and usernames John C Klensin
- Re: [precis] names and usernames Martin J. Dürst