Documentation for Stylistc Sets 1 & 2

[virtualvinodh]

would like to use the font for Aksharamukha (https://www.aksharamukha.com/converter). I currently use Ranjana Unicode, which I was told has several issues with certain Samyuktasharas that I had to put a disclaimer.

I see several stylistic sets in the font. Some of them are for Kutaksharas, which is fine. My knowledge of Ranjana is very cursory. Clearly, I don't quite understand the replacements in SS01 and SS02. Are the to be used to display the Tibetan variants of the Samyukatsharas and the vowel signs /ai/ and /au/?

V