Item Drops
Item Drops have several properties, some are only used by certain things such as the dungeon properties only being used by Dungeon JSON.
Properties
string item
The id of the item such as minecraft:stone. Modded ids can be used and if nothing matches then this Item Drop is just ignored. Required.
int metadata
The metadata of the item which is used for items or blocks that have multiple forms. Default 0
int minAmount
The minimum random stack size. Default 1
int maxAmount
The maximum random stack size. If less than the minAmount, this value is ignored and the minimum amount is always dropped. Default 1
double chance
The chance of this Item Drop being dropped or placed in a loot chest, etc. Set to 1 for always and 0 to essentially disable this Item Drop without deleting it from json. Default 0 (never)
int subspecies
If set, the subspecies index of the mob such as 0 for normal, 1 or 2 for uncommon and 3 for rare. Note that creature json allows for the subspecies order to be changed. Default -1 (ignore subspecies)
string burningItem
An alternate item id to use when a burning creature drops this Item Drop. Used to drop cooked meat from burning animals, etc. Default: Empty
int burningMetadata
An alternate item metadata to use when a burning creature drops this Item Drop. Default: Empty