@coriander @wallhackio specifically it's gbfvr-flavoured notation
that game has L, M, H, and U for Light, Medium, Heavy and Unique. numbers are "a direction that you can hold the stick in", there's 9 possible angles (including neutral) that are numbered like so:
789
456
123
it's called "numpad notation" for reasons that will become clear if you look at your numpad
">" just means "proceed to the next move" as opposed to meaning specifically "link" or "cancel", i guess when it's intuitive. and f.
as a prefix means "the far version of this move as opposed to the close one"
so "2L > f.L > 214L" means "crouching light, standing far light, quarter circle backward light"