Re: [I18nrp] [art] Use Unicode if Using Unicode?

[Larry Masinter <[e-mail]>]

No matter what path you take for new RFCs, implementations will lag, and some choices for strings used for domain names, (LHS of) email addresses and short URLs will have problems 
1) When put through different implementations of normalization (IDNA2008 vs 2003 vs. some exceptions)
2) When used in user interfaces for comparison or validation or comparison (in the address bar or rollover links)
3) When scanning text for picking out URLS
4) when used in print or other media (in an ad or written on a napkin)

These are in order of decreasing specificity, increasing “liberal displacement”.
I think those who are choosing names to use (as domain name, email address, short url) will want to use (4), no matter what rules the registry applies. Anyone registering a domain name, a user name at a mail host, or a (short) URL will want to choose names that they can print on a business card or an ad or a roster and believe that their target audience can enter and get the string intended.
And 1 < 2 < 3 < 4 as equivalence goes. 

I don’t think it’s practical to redo all the protocols that use these strings to pass along a tuple of string and context.

Larry
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https://LarryMasinter.net