A holder trigger is a type of trigger that can have sub-triggers. These sub-triggers are denoted by the use of the identifier parameter. What this means is that these types of triggers cover a wide variety of use cases and as such are (within the same channel) allowed to have multiple parameter sets. Using 2 different identifiers on the same holder trigger is like using 2 different simple triggers that have virtually the same effect. On the other hand, using the same identifier for the same holder trigger is like reusing the same simple trigger. Identifier are unique for both triggers and channels. This means that something like dimension-battle will always be different from something like mob-battle. It also means that adding dimension-battle on 2 different channels will still define 2 separate triggers.

Outside of the implied trigger system, identifiers do not have an effect on whether a trigger can activate. As such, identifier parameters can be set to any string value. For example, a time trigger with an identifier of night (time-night) will not necessarily be active during the night. In this case, the time_bundle or start_hour & end_hourparameters are what determines that.

The 25 trigger holders are advancement, biome, blockentity, command, difficulty, dimension, effect, gamestage, gui, height, inventory, light, mob, moon, pvp, raid, rainintensity, riding, season, statistic, structure, time, tornado, victory, and zones