* An ''unqualified item ID'' (<code>item.ItemId</code>) is a [[#Unique string ID|unique string ID]] for the item. This should generally be unique, but older vanilla items have non-unique numeric IDs for legacy reasons. | * An ''unqualified item ID'' (<code>item.ItemId</code>) is a [[#Unique string ID|unique string ID]] for the item. This should generally be unique, but older vanilla items have non-unique numeric IDs for legacy reasons. |