Subsidy per the halving schedule
what the rules allowed the miner to claim
What the protocol allowed the miner to take in this block, as opposed to what they actually took. The two are almost always the same, and the exceptions are the interesting part.
DefinitionThe theoretical block subsidy from the halving schedule.
LimitThis is a reference line, not a measurement. Real supply must be summed from what was claimed, not from this.