Tables and contextual rule for IDEOGRAPHIC ITERATION MARKs
"Martin J. Dürst"
duerst at it.aoyama.ac.jp
Thu Apr 9 09:59:22 CEST 2009
I understand that there is a desire to add some context constraints for
middle dot, but I don't understand why we need constraints for
Ideographic Iteration Mark. In my opition, the context given by Yoshiro
is correct, but the chance that this character gets confused with
something else is as big or as little as any other randomly picked
character, so I don't see why we would need context. Is it that this is
a punctuation character, that we can only exceptionally include
punctuation characters, and only if they have context?
On 2009/04/09 8:23, Yoshiro YONEYA wrote:
> Dear all,
> There are another comments on contextual rules for IDEOGRAPHIC ITERATION
> 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:
> MUST NOT be at the beginning of the label, and the previous
> character MUST be in Han, Hiragana or Katakana Script.
> Rule Set:
> 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,
#-# Martin J. Dürst, Professor, Aoyama Gakuin University
#-# http://www.sw.it.aoyama.ac.jp mailto:duerst at it.aoyama.ac.jp
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