zompist bboard

What do the curly bracket in this mean?
"eːi {oːi,aːi} → eː oː (?)"

It's a set of inputs, here. So what that means is that both oːi and aːi go to oː

Right... So it's saying any "x" or "y" that i see turn into "a".
What about if it's in reverse... {a} > {x,y} does that mean either "x" or "y", or does it mean output as "xy"

Durakken wrote:What about if it's in reverse... {a} > {x,y} does that mean either "x" or "y", or does it mean output as "xy"

Either-or, though I'm not sure why you would use this notation unless you're just not bothering to specify the environment or it's a random distribution.

Or the exact distribution isn't yet known, which I have seen in the ID