Re: [idn] opting out of SC/TC equivalence

[=?utf-8?B?dHNlbmdsbUDoqIjntrLkuK3lv4Mu5Lit5aSnLnR3?= <tsenglm@cc.ncu.edu.tw>]

> > VeriSign/NSI  announced ML.com  with any UNICODE can be mixed.
> > That is the key problems.
> >        Any suggestions must be considered  what to do for .COM in this
WG.
> > If english character is treated as case folding, Why  CJK can not
treated as
> > the same way to reduce the number of registrations for trade mark
> > considerations?  Case folding is also not a protocol issue .  It is
> > othogonal to IDNA too.
> >
> > L. M. Tseng,
>
> Tseng, which solution do you support ?
>
Lee,  sorry, some IDN problems need them both.
    Method 1 is policy based approach.  Method 2 is technique approach.  To
solve problems ,  first one is technique possibility then  policy is
considered finally .  For  chinese scripts ,  Method 2 only applied to case
of bidirectional one one mapping . It also has one trouble : In a set of
scripts, which script is the canonical form ? If  script display is needed .
The transformed ACE code can not recover to the original  scripts . So it
solve only partial problems.
    Method 1 is considered to reduce the complexity of  1 to n or n to n
mapping case ,  if there are no simple way to solve the difficulty, 1 to n
scrpts mapping are forecd to selected one by user in registration time.
Actually,  1 to n  and n to n or forbidden one are always solved by policy.
But these selection need assign one SC or TC as the primary form , so ACE
encoding is the mapping table form to map IDN(TC) and IDN(SC) to primary
ACE(IDN) .  This is a policy of selecting best one .  It also solve partial
problems too.
     So, both are need . If you considered the suitable display  scripts
form, Another table mapping method should be included to reverse reference
them.

L.M.Tseng

>  1. Registration/Dispute Resolution Policy that assures:
>
>      The first registrant of a SC or TC .com domain should take
>      all of its SC/TC equivalent alternatives.
>
>  2. The new version of Unicode Standard   defines
>      additional case-mapping rules  for SC/TC equivalences and
>      NAMEPREP  refers to that standard document  for doing SC/TC case
folding.
>
> Soobok Lee
>
>