Name of the item to refer to (dataname)
This is not a tagetname. You can trigger this item by a targetname and you can refer to this item by its dataname.
The display name of the item (displayname)
This name show up at the inventory and when picking up the item.
Item icon inside the Sprites folder (iconname)
Name of the icon used for diplaying the item (.PNG).
Chance of appearing (chance)
From 1-100, this is the chance that this entity has to spawn on the level.