Minecraft wiki entry for Item_format, associated text:  tag: Parent tag.
 Damage: (May not exist) The damage value for this item. Defaults to 0.
 display: (May not exist) Display properties.
 Name: (May not exist) The JSON text component to use to display the item.
 Lore: (May not exist) List of strings to display as lore for the item.
: (May not exist) A line of text for the lore of an item.
 RepairCost: (May not exist) Number of experience levels to add to the base level cost when repairing, combining, or renaming this item with an Anvil.
 minecarft:item_lock: 1 for "lock in slot". 2 for "lock in inventory".
 minecraft:keep_on_death: 1 if keeping on death.[needs testing]