internationalization – Are the periods after the numbers of a list an international convention?

Short answer:
The dots are the default counter suffix for implementing the ordered list in web browsers.

Long answer:
If you use ordered lists in Web pages, the browsers implement them using period after. If not specified, the the default value will be " 2E 20" (".", an end point followed by a space).
You can see an example of a specification: https://html.spec.whatwg.org/multipage/grouping-content.html#attr-ol-type

Arabic numerals are just one type of predefined counters possible, which is https://drafts.csswg.org/css-counter-styles-3/#predefined-counters. Due to the requirements of typography and internationalization, the W3C has invented ways to replace default values.

The suffix of the counter can be changed from the default period to , , or .

Also common, I saw parentheses (")"closed parenthesis, called unmatched parenthesis). Depending on the hierarchy of your ordered lists, you may need to lower several levels. As a result, you may need several counter suffix styles (points & # 39; for level 1, simple parentheses & # 39;) & # 39; for level 2, paired parentheses (). level 3, colon: & # 39; for level x, etc.).

1.
1.1 ...
(a) ...
a.1: ...
2) or (2) ...
3) or (3) ...

Regarding your question on the international convention. I do not know, but you can find out more about the subject at https://writing.stackexchange.com/a/5685.


From the point of view of usability, I think that a suffix is ​​needed because it makes it clear to the user that it is a list item and not a problem. 39, a value.
For example, by reading:

1. apples
2. oranges

I will know that it is an enumeration and not a quantitative information:

1 apple
2 oranges

So, whatever suffix you use (whether it's an international convention or not), I would suggest using a suffix to mark ordered lists accordingly.