Minecraft wiki entry for Experience, associated text: Entity data
Tags common to all entities[show]
 Age: The number of ticks the XP orb has been "untouched". After 6000 ticks (5 minutes) the orb is destroyed.
 Count: The remaining number of times that the orb can be picked up. When the orb is picked up, the value decreases by 1. When multiple orbs are merged, their values are added up to result orb. When the value reaches 0, the orb is depleted.
 Health: The health of XP orbs. XP orbs take damage from fire, lava, falling anvils, and explosions. The orb is destroyed when its health reaches 0.
 Value: The amount of experience the orb gives when picked up.