[i18n-drafts] [questions/qa-upright-counters-in-vertical] Japanese vertical itemized lists (#620)

taroyamamoto-451 has just created a new issue for https://github.com/w3c/i18n-drafts:

== [questions/qa-upright-counters-in-vertical]  Japanese vertical itemized lists  ==
[source] (https://w3c.github.io/i18n-drafts/questions/qa-upright-counters-in-vertical.html) [en]

As I am not an expert in CSS and HTML, I don’t know whether and how we can typeset Japanese vertical list items by using the web technologies, but I would like to mention what I thought about Japanese vertical itemized lists based on my experience in typography.

There are not any generally established rules for how to typeset itemized lists in vertical Japanese text. In that sense, any typesetting methods are thought to be acceptable. However, I think that the following points are the most widely expected things for vertical itemized lists in Japanese typography.

1. In a vertical itemized list, it is necessary to decide what character(s) should be placed at the beginning of each item beforehand, and it should be consistent throughout all the items in the list. For example, it can be a Western Arabic numeral, Latin character, Latin numeral, Chinese numeral, Chinese/Japanese ideograph, Japanese hiragana or katakana character, or a symbol used as a bullet, but it is not limited to any of these.

2. If the first character of an item is a Chinese digit of a Chinese number with multiple digits, the number is set vertically in the same way as normal Chinese characters are typeset.

3. If the first character of an item is a Western Arabic or Roman numeral, and there are multiple digits, only the number is set horizontally (this is a kind of TCY or Tate-Chu-Yoko [meaning horizontal elements in a vertical line]).

4. In a vertical itemized list, the posture of the character(s) at the beginning of each item in the list should be upright, even when they are Latin characters, Western Arabic numerals, or Roman numerals. However, if the character(s) are enclosed in brackets such as parentheses, there are two possibilities: (1) The brackets are represented by vertical Japanese bracket glyphs for vertical typesetting (for example, if there are an opening parenthesis + (a) character(s) + a closing parenthesis, these will take up three character escapement widths vertically in the line). In this case, we need to decide in advance whether a half-width space should be placed before the opening parenthesis, which is regarded as a half-width glyph here, considering the amount of indentation at the beginning of the line and how the opening parenthesis visually aligns with characters in its neighboring lines. (2) Horizontal brackets such as parentheses are used in the TCY mode.

5. When multiple characters are set in the TCY mode at the beginning of each item, the full (total) width of all the TCY characters should be centered horizontally at the position of the main vertical line containing the TCY characters.

6. In a vertical itemized list, the amount of indentation at the beginning of the first line of each item in the list should be decided beforehand, and it should be consistent throughout all the items in the list. 

7. In a vertical itemized list, the amount of indentation at the beginning of the second and subsequent lines of each item should be decided in advance, and this should be consistent throughout all the items in the list. It should be noted that there are cases where the starting position of the second and subsequent lines is set to a higher level than that of the first line.

8. As each line proceeds vertically in a vertical itemized list in Japanese, any delimiter symbol that follows the first character of a list item should not be treated in the TCY mode. If a Western proportional character such as a full stop is used as the delimiter in the original text, it should be deleted or replaced with a more appropriate Japanese full-width symbol glyph.

I attach some samples that I made as images.

![examples_of_Japanese_vertical_itemized_listNEWp](https://github.com/user-attachments/assets/8b20076c-99fa-4bab-856c-d8d30d654a44)
![examples_of_Japanese_vertical_itemized_listNEWp2](https://github.com/user-attachments/assets/1a10bf42-a20f-47e5-bd73-28039a6145a2)
![examples_of_Japanese_vertical_itemized_listNEWp3](https://github.com/user-attachments/assets/9e38b70e-f344-4e6b-9d6b-365cda3f2389)



Please view or discuss this issue at https://github.com/w3c/i18n-drafts/issues/620 using your GitHub account


-- 
Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config

Received on Tuesday, 26 November 2024 06:45:19 UTC