RSFTL

Resi's Systematic Formula for Timeline Labeling or RSTFL is a system used for labeling alternate timelines developed by Resi in 1434 AD. It consists of two components; the Distance and Direction relative to the Zero Point, and the Layer. If a universe is a layer below another universe, the universe below the other universe will be fictional in all universes in the layers above. The top layer is the A-layer, followed by the B-layer, and so on.