SAMI(SMI) HTML & CSS are supported.

[Potmarigold]

HTML tags are applied to SRT subtitles without any problems, but SAMI (smi) subtitles ignore font face and font size, so I want them to be supported in the same format as SRT. SAMI subtitles are subtitles used in Internet Explorer, so they support all HTML supported by the web browser.

https://learn.microsoft.com/en-us/previous-versions/windows/desktop/dnacc/understanding-sami-1.0

HTML & CSS are supported.

Of course, the original ASS tag {\an1}-{\an9} is sometimes used, but it is not originally supported. (I like that it is supported.)
However, it seems meaningless if you cannot use HTML tags that are originally supported.
Originally supported tags such as or would like to be supported.

It's a Google translation, so I'm not sure if it will be delivered properly, but I hope it's corrected.