Consensus Call Tranche 8 Summary - Addendum

[Martin Duerst]

At 23:10 08/10/21, Marcos Sanz/Denic wrote:
>> One idea I just had was to create a category HISTORIC.
>> While this category would be equivalent to PROTOCOL-VALID
>> for the protocol, it would clearly give some information
>> to registries out there. Because it would not mean any
>> decision with regards to protocol, it might be easier
>> for us to come forward with some guidelines on what
>> to put into HISTORIC, easier than it was with MAYBE
>> and friends.
>
>Although such categorization might be useful, I don't find that the 
>definition of such a category *within the IDNA standard* appropriate. 
>Isn't there within the Unicode Standard already a definition of "obsolete 
>character" in the sense of "historical character" (not to be confused with 
>a deprecated character)? Obsolete characters in the sense of "historical" 
>are at least mentioned in Unicode 5.0, Chapter 3.4, D13.

D13 talks about deprecated characters. These are characters that are
obsolete in the history of the Unicode standard (e.g. formatting-like
stuff that once seemed like a good idea to encode, but where it was
later found out that it was just creating nothing but problems), which
is totally different from characters used to write historic (in the history
of human culture) texts. What you are looking for would be in Section 3.5,
but I haven't found it. It may be possible to put something together
rather easily based on script blocks, but I guess that would be rather
rough, because many script blocks contain both characters in modern
use and historic characters.

Regards,    Martin.

>If such a concept actually already exists, the message to the registries 
>out there could plainly be: "These characters are PVALID within IDNA, but 
>before they are included in your positive list for registration, check out 
>the Unicode Standard to find out if they are historical within your 
>context. If they are, caveats apply."
>
>Best regards,
>Marcos


#-#-#  Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
#-#-#  http://www.sw.it.aoyama.ac.jp       mailto:duerst at it.aoyama.ac.jp