User:WinX64/Slot Data

The Slot data structure defines how an item is represented when inside an inventory window of any kind, such as a chest or furnace.

This page presents the new Slot data structure, using structured components. You can find the documentation of the old structure, that utilizes raw NBT data, here.

Format

Some description does here.

Name		Type		Meaning
Item Count		VarInt		The item count. Every following field is only present if this value is greater than zero.
Item ID		Optional VarInt		The item ID. Item IDs are distinct from block IDs; see Data Generators for more information.
Number of components to add		Optional VarInt		Number of elements present in the first data component array
Number of components to remove		Optional VarInt		Number of elements present in the second data component array. This serve as a way to remove the default component values that are present on some items.
Components to add	Component type	Optional Array	Optional VarInt Enum	The type of component. See Structured components for more detail.
	Component data		Optional Varies	The component-dependent data. See Structured components for more detail.
Components to remove	Component type	Optional Array	Optional VarInt Enum	The type of component. See Structured components for more detail.

Structured components

The complete list of available components is described below. Items marked in blue cause no noticeable impact on the client, and mainly concern server-side operations.

For a more in-depth description, and information on how the items below are encoded with the NBT format, check here.

Type	Name	Description	Data
0	minecraft:custom_data	Customizable data that doesn't fit any specific component.	As follows: Name Type Description Data NBT Always a Compound Tag.
1	minecraft:max_stack_size	Maximum stack size for the item.	As follows: Name Type Description Max stack size VarInt Ranges from 1 to 99.
2	minecraft:max_damage	The maximum damage the item can take before breaking.	As follows: Name Type Description Max damage VarInt
3	minecraft:damage	The current damage of the item.	As follows: Name Type Description Damage VarInt
4	minecraft:unbreakable	Marks the item as unbrekable.	As follows: Name Type Description Show in tooltip Boolean Whether the Unbreakable indicator should be shown on the item's tooltip.
5	minecraft:custom_name	Item's custom name. Normally shown in italic, and changeable at an anvil.	As follows: Name Type Description Name Text Component
6	minecraft:item_name	Override for the item's default name. Shown when the item has no custom name.	As follows: Name Type Description Name Text Component
7	minecraft:lore	Item's lore.	As follows: Name Type Description Number of lines VarInt Number of elements in the following array. Lines Array of Text Component
8	minecraft:rarity	Item's rarity. This affects the default color of the item's name.	As follows: Name Type Description Rarity VarInt Enum Can be one of the following: 0 - Common (white) 1 - Uncommon (yellow) 2 - Rare (aqua) 3 - Epic (pink)
9	minecraft:enchantments	The enchantments of the item.	As follows: Name Type Description Number of enchantments VarInt Number of elements in the following array. Enchantment Type ID Array VarInt Enum The ID of the enchantment in the enchantment registry. Level VarInt The level of the enchantment. Show in tooltip Boolean Whether the list of enchantments should be shown on the item's tooltip.
10	minecraft:can_place_on	List of blocks this block can be placed on when in adventure mode.	As follows: Name Type Description Number of predicates VarInt Number of elements in the following array. Block predicates Array of Block Predicate Show in tooltip Boolean Whether the list of blocks should be shown on the item's tooltip.
11	minecraft:can_break	List of blocks this item can break when in adventure mode.	As follows: Name Type Description Number of predicates VarInt Number of elements in the following array. Block predicates Array of Block Predicate Show in tooltip Boolean Whether the list of blocks should be shown on the item's tooltip.
12	minecraft:attribute_modifiers	The attribute modifiers of the item.	As follows: Name Type Description Number of attributes VarInt Number of elements in the following array. Attribute Type ID Array VarInt Enum The ID of the attribute. Unique ID UUID The attribute's unique ID. Name String The attribute's name. Value Double The attribute's value. Operation VarInt Enum The operation to be applied upon the value. Can be one of the following: 0 - Add 1 - Multiply base 2 - Multiply total Slot VarInt Enum The item slot placement required for the attribute to have effect. Can be one of the following: 0 - Any 1 - Main hand 2 - Off hand 3 - Hand 4 - Feet 5 - Legs 6 - Chest 7 - Head 8 - Armor 9 - Body Show in tooltip Boolean Whether the list of attributes should be shown on the item's tooltip.
13	minecraft:custom_model_data	Value for the item predicate when using custom item models. More info can be found here.	As follows: Name Type Description Value VarInt
14	minecraft:hide_additional_tooltip	The following information needs to be added to this page: What is considered as "additional"? What exact items does this hide?	None.
15	minecraft:hide_tooltip	Hides the item's tooltip altogether.	None.
16	minecraft:repair_cost	Description here.	Data here.
17	minecraft:creative_slot_lock	Description here.	None.
18	minecraft:enchantment_glint_override	Description here.	Data here.
19	minecraft:intangible_projectile	Description here.	Data here.
20	minecraft:food	Description here.	Data here.
21	minecraft:fire_resistant	Description here.	None.
22	minecraft:tool	Description here.	Data here.
23	minecraft:stored_enchantments	Description here.	Data here.
24	minecraft:dyed_color	Description here.	Data here.
25	minecraft:map_color	Description here.	Data here.
26	minecraft:map_id	Description here.	Data here.
27	minecraft:map_decorations	Description here.	Data here.
28	minecraft:map_post_processing	Description here.	Data here.
29	minecraft:charged_projectiles	Description here.	Data here.
30	minecraft:bundle_contents	Description here.	Data here.
31	minecraft:potion_contents	Description here.	Data here.
32	minecraft:suspicious_stew_effects	Description here.	Data here.
33	minecraft:writable_book_content	Description here.	Data here.
34	minecraft:written_book_content	Description here.	Data here.
35	minecraft:trim	Description here.	Data here.
36	minecraft:debug_stick_state	Description here.	Data here.
37	minecraft:entity_data	Description here.	Data here.
38	minecraft:bucket_entity_data	Description here.	Data here.
39	minecraft:block_entity_data	Description here.	Data here.
40	minecraft:instrument	Description here.	Data here.
41	minecraft:ominous_bottle_amplifier	Description here.	Data here.
42	minecraft:recipes	Description here.	Data here.
43	minecraft:lodestone_tracker	Description here.	Data here.
44	minecraft:firework_explosion	Description here.	Data here.
45	minecraft:fireworks	Description here.	Data here.
46	minecraft:profile	Description here.	Data here.
47	minecraft:note_block_sound	Description here.	Data here.
48	minecraft:banner_patterns	Description here.	Data here.
49	minecraft:base_color	Description here.	Data here.
50	minecraft:pot_decorations	Description here.	Data here.
51	minecraft:container	Description here.	Data here.
52	minecraft:block_state	Description here.	Data here.
53	minecraft:bees	Description here.	Data here.
54	minecraft:lock	Description here.	Data here.
55	minecraft:container_loot	Description here.	Data here.

Other types

Common types used in multiple components are described below.

Block Predicate

Describe the block predicate type here.