RoboRumble result

What's the means of "APS","Survival","ELO Rating","Glicko-2(RD)","Battles","Pairings","PL Score" in the RoboRumble?And how to work out them?

"APS","ELO Rating","Glicko-2(RD)": Darkcanuck/RRServer/Ratings
Premier League: [1]

Survival - it's average percent of rounds where robot survive
Battles - it's count of battles in which robot takes part
Pairings - it's count of another robots with which robot has battles
PL Score - it's count of wins in pairings (score percent > 50) * 2

for example robot A has 2 battles with robot B with score percents (45, 60) and no battles with robot C. In this case APS will be (45 + 60) / 2 = 52.5; battles will be 2; pairings will be 1; PL Score will be 1 * 2 = 2