Tables and contextual rule for IDEOGRAPHIC ITERATION MARKs

[Yoshiro YONEYA]

Dear all,

There are another comments on contextual rules for IDEOGRAPHIC ITERATION 
MARKs.

Despite of its name, IDEOGRAPHIC ITERATION MARK (U+3005) sometimes used 
next to Hiragana or Katakana.  Therefore, contextual rule for IDEOGRAPHIC 
ITERATION MARK should be as follows:

Appendix A.10.  IDEOGRAPHIC ITERATION MARK;
   Code point:
      U+3005
   Overview:
      MUST NOT be at the beginning of the label, and the previous
      character MUST be in Han, Hiragana or Katakana Script.
   Lookup:
      False
   Rule Set:
      True;
      If FirstChar .eq. cp Then False;
      If Script(Before(cp)) .ne. ( Han | Hiragana | Katakana ) Then False;

In tables-05 document, VERTICAL IDEOGRAPHIC ITERATION MARK (U+303B) is 
also defined as CONTEXTO.  The usage of VERTICAL IDEOGRAPHIC ITERATION 
MARK is very restricted because it is used for up to down direction 
writing.  So it is rarely used in electrical writing for communication.
Thus, VERTICAL IDEOGRAPHIC ITERATION MARK should be DISALLOWED.

Best regards,

-- 
Yoshiro YONEYA <yone at jprs.co.jp>