List of characters Devonthink indexes beyond Alphanumeric?

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1

I understand that most special characters are not indexed in Devonthink.
That said some special characters do reliably turn up in searches: π is one. (Unfortunately @ and # are not)
Is there a list of characters Devonthink indexes beyond (A-Z a-z and 1-9)?
I’d find that useful and much easier than trying to identify them by trial and error,
Thanks,
Eiron

2

DEVONthink indexes all alpha-numeric characters (including foreign languages like Greek etc.) but doesn’t index symbols, separators, white spaces etc.