Re: Spaces and full width punctuation in Korean

hi f&F,

I'd quite like to know the answers to these questions too.  I did a 
little research:

한글 맞춤법, 한글 맞춤법[문화체육관광부고시 제2017-12호(2017. 3. 28.)] 바로 
가기 
<https://www.korean.go.kr/front/page/pageView.do?page_id=P000209&mn_id=30> 
(Hangul Spelling [Ministry of Culture, Sports and Tourism Notice No. 
2017-12 (March 28, 2017)]) contains a number of gaps, but says

reductionenlargement

"12. Square brackets ([ ])

In the previous regulation, brackets were presented as'〔 〕', but in the 
amendment, they were changed to '[ ]'.The basic form was suggested as'[ 
]'considering that'〔 〕'was not used well before revision and'[ ]'was 
mainly used.However, it does not mean that you cannot write'〔 〕'.If 
necessary for design or editing,'〔 〕' can be used in square brackets."

https://www.korean.go.kr/front/page/pageView.do?page_id=P000203&mn_id=30

However, this is a page that uses the mathematical sign
≫ U+226B MUCH GREATER-THAN
for quote marks a little further down the page, so i'm not prepared to 
fully trust it.



Requirements for Hangul Text Layout and Typography : 한국어 텍스트 레이아웃 
및 타이포그래피를 위한 요구사항
Says that full-width characters are used 
(https://w3c.github.io/klreq/#fonts-faceposnparens), but seems to 
indicate that they are more common in (though not exclusive to) vertical 
text https://w3c.github.io/klreq/#fonts-faceposnparens
It's not clear, even in their (unfortunately graphic only) examples, 
what is the relationship with U+0020 space.


In my own notes at https://r12a.github.io/scripts/hangul/#quotations 
there is a mention that spaces are used before but not after quote 
marks, but it's not clear to me why, and although the examples are 
text-based, i don't seem to have listed the source. Grr.



Maybe the best thing to do is raise a question at 
https://github.com/w3c/klreq/issues and cc @jihyerish, @soon-bum, 
@peremen and @studioego.  May be best to start with some questions such as
- where and how often does Korean use full-width punctuation?
- is full-width punctuation used alongside ASCII space?


hth (but probably not much)
ri






Florian Rivoal wrote on 29/09/2020 05:22:
> Hi Richard,
>
> We're looking into https://drafts.csswg.org/css-text-3/#line-break-transform, and particularly Murakami-san's suggestion (https://github.com/w3c/csswg-drafts/issues/5086#issue-621170190) that we may be able to aggressively discard source-code line-breaks right before/after certain punctuation marks, regardless of what's on the other side. He's suggestion seems good to us as far as Japanese is concerned, but we were wondering about Korean, due to its use of U+0020 for word separation, possibly combined with some amount of traditional CJK punctuation.
>
> Specifically, we're wondering whether:
>      * any full-width punctuation (from CJK Symbols and Punctuation) is used in modern Korean
>      * if so, whether they're used adjacent to U+0020 spaces that are expected to be preserved
>
> As far as we can tell, even if most punctuation used is the common latin script stuff, there is some usage of full width ones, with some variation between North and South Korea. Wikipedia claims the following may be in some degree of use: 〜『』「」《》
>
> As 〜 is used as a range separator, and isn't expected to be next to a space, so we should be good.
>
> 『』「」《》all include a half-blank in the character itself, so we suspect that when used in Korean text, even text that normally uses U+0020, no such additional space is need next to them. But it would be good to confirm.
>
> Similarly, the traditional 、and 。probably aren't used in modern text, but even if they were, they typically include enough built-in spacing that an additional U+0020 would not be be needed. Same goes for ：；！？・
>
> With all that in mind, it looks like what we want to do is fine, but it would be good confirm with people who actually know about Korean typography, in case, for example, Korean fonts don't include the extra space in the glyphs and do require the use of adjacent U+0020.
>
> Thanks,
> –f&F