The blackletter glyphs e, o, oopenstroke, and ostroke have a -blackletter suffix while the rest have a -fraktur suffix (and only those glyphs render the placeholder glyph).
It seems e-blackletter and o-blackletter should not be listed (because the -fraktur counterpart exists). Not sure if oopenstroke and ostroke need a different suffix…
Those names come from the Unicode description. The -blackletter ones are “normal” latin characters (in the 0xAB30 block). And the -fraktur glyphs are math symbols (in the 0x1D500 block). They probably all used for math? And the missing preview glyph means that no font in the system supports it.
Ok great! I can’t say more about it, not working on those glyphs. I just stumbled upon it and it seemed like an inconsistency. But if it’s all intentional, I have no more to add – only: thanks forth the swift response!
I don’t know enough about the usage of those letters to know if they could be unified or not.
These *-blackletter are not math symbols, they are text symbols used in phonetic description notations. They should be removed from the math symbols list.
Thanks for the info. I fixed it.
