Changes: Nether Reactor Core

Block Entity

All block entities share this base:

• : The block entity's root tag.
  •  CustomName: (May not exist) The custom name of the block entity.
  •  id: The savegame ID of the block entity.
  •  isMovable: 1 or 0 (true/false) - true if the block entity is movable with a piston.
  •  x: X coordinate of the block entity.
  •  y: Y coordinate of the block entity.
  •  z: Z coordinate of the block entity.

Additional fields for block entity types

Banner

Additional fields for banner:

• : The block entity's root tag.
  •  Base: The base color of the banner. See Banner#Block_data.
  •  Patterns: (May not exist) List of all patterns applied to the banner.
    • : An individual pattern.
      •  Color: The base color of the pattern. See Banner#Block_data.
      •  Pattern: The pattern ID code. See Banner#Block_data.
  •  Type: The type of the block entity. 0 is normal banner. 1 is ominous banner.

Beacon

Additional fields for beacon:

• : The block entity's root tag.
  •  primary: The primary effect selected, see Potion effects for IDs. Set to 0 when no effect is selected.
  •  secondary: The secondary effect selected, see Potion effects for IDs. Set to 0 when no effect is selected. When set without a primary effect, does nothing. When set to the same as the primary, the effect is given at level 2 (the normally available behavior for 5 effects). When set to a different value than the primary (normally only Regeneration), gives the effect at level 1.^{[needs testing]}

Bed

Additional fields for bed:

• : The block entity's root tag.
  •  color: The data value that determines the color of the half-bed block. When a bed is broken, the color of the block entity at the bed's head becomes the color of the bed item when it drops. See Bed#Metadata.

Beehive and Bee Nest

Additional fields for beehive and bee nest:

• : The block entity's root tag.
  •  Occupants: (May not exist) Entities currently in the hive.
    • : An entity in the hive.
      •  ActorIdentifier: The entity in the hive. Always minecraft:bee<> in vanilla game. ^{[more information needed]}
      •  SaveData: The NBT data of the entity in the hive.
        • Tags common to entity
        • Tags unique to this entity type.
      •  TicksLeftToStay: The time in ticks until the entity leave the beehive.
  •  ShouldSpawnBees: 1 or 0 (true/false) - true if new bees will be spawned.

Bell

Additional fields for bell:

• : The block entity's root tag.
  •  Direction: The direction data of this bell.^{[more information needed]}
  •  Ringing: 1 or 0 (true/false) - true if it is ringing.
  •  Ticks: Unknown.^{[more information needed]}

Brewing Stand

Additional fields for brewing stand:

• : The block entity's root tag.
  •  CookTime: The number of ticks until the potions are finished.
  •  FuelAmount: Remaining fuel for the brewing stand.
  •  FuelTotal: The max fuel numder for the fuel bar.
  •  Items: List of items in brewing stand.
    • : An item in the brewing stand, including the slot tag.
      •  Slot: The slot the item is in.
      • Tags common to item stack

Campfire and Soul Campfire

Additional fields for campfire and soul campfire:

• : The block entity's root tag.
  •  Item<num>: (May not exist) An items currently cooking. <num> is 1, 2, 3, and 4.
    • Tags common to item stack
  •  ItemTime<num>: How long each item has been cooking. <num> is 1, 2, 3, and 4.

Cauldron

Additional fields for cauldron:

• : The block entity's root tag.
  •  CustomColor: (May not exist) This tag exists only if the cauldron stores dyed water; stores a 32-bit ARGB encoded color.
  •  Items: List of items in this container.
    • : An item, including the slot tag.
      •  Slot: The inventory slot the item is in.
      • Tags common to item stack
  •  PotionId: If the cauldron contains a potion, this tag stores the ID of that potion. If there is no potion stored, then this tag is set to -1.
  •  PotionType: If the cauldron contains a potion, this tag stores the type of that potion. 0 is normal, 1 is splash, 2 is lingering. If there is no potion stored, then this tag is set to -1.

Chalkboard

Additional fields for chalkboard:

• : The block entity's root tag.
  •  BaseX: The X position of its base.
  •  BaseY: The Y position of its base.
  •  BaseZ: The Z position of its base.
  •  Locked: 1 or 0 (true/false) - true if it is on locked.
  •  OnGround: 1 or 0 (true/false) - true if it is on ground.
  •  Owner: The Unique ID of its owner.
  •  Size: The size of this chalkboard.
  •  Text: The text on the chalkboard.

Chemistry Tables

Additional fields for chemistry tables (compound creator, element constructor, lab table, material reducer):

• : The block entity's root tag.
  •  itemAux: (Only for Lab Table) Unknown.
  •  itemId: (Only for Lab Table) Unknown.
  •  itemStack: (Only for Lab Table) Unknown.

Chests

Additional fields for chest, trapped chest, barrel, and ender chest:

• : The block entity's root tag.
  •  Findable: Unknown.
  •  forceunpair: 1 or 0 (true/false) - (may not exist) true if this chest is unpair with chest next to it.
  •  Items: List of items in this container.
    • : An item, including the slot tag.
      •  Slot: The inventory slot the item is in.
      • Tags common to item stack
  •  LootTable: (May not exist) Loot table to be used to fill the chest when it is next opened, or the items are otherwise interacted with.
  •  LootTableSeed: (May not exist) Seed for generating the loot table. 0 or omitted use a random seed.
  •  pairlead: (May not exist) Unknown.
  •  pairx: (May not exist) The X position of the chest paired with.
  •  pairz: (May not exist) The Z position of the chest paired with.

Chiseled Bookshelf

Additional fields for chiseled bookshelf:

• : The block entity's root tag.
  •  Items: List of books in the bookshelf.
    • : An item in the chiseled bookshelf.
      • Tags common to item stack
  •  LastInteractedSlot: Last interacted slot (1-6), or 0 if no slot has been interacted with yet.

Command Block

Additional fields for command block:

• : The block entity's root tag.
  • Tags common to command block
  •  auto: 1 or 0 (true/false) - Allows to activate the command without the requirement of a redstone signal.
  •  conditionalMode: (May not exist) Unknown.
  •  conditionMet: 1 or 0 (true/false) - if a conditional command block had its condition met when last activated. True if not a conditional command block.
  •  LPCondionalMode: Unknown.
  •  LPRedstoneMode: Unknown.
  •  LPCommandMode: Unknown.
  •  powered: 1 or 0 (true/false) - true if the command block is powered by redstone.

Comparator

Additional fields for comparator:

• : The block entity's root tag.
  •  OutputSignal: Represents the strength of the analog signal output of this redstone comparator.

Conduit

Additional fields for conduit:

• : The block entity's root tag.
  •  Active: 1 or 0 (true/false) - true if it is active.
  •  Target: The Unique ID of the hostile mob the conduit is currently attacking. If there's no target, defaults to -1.

Decorated Pot

Additional fields for decorated pot:

• : The block entity's root tag.
  •  sherds: List of shards on this decorated pot.
    • : Item ID of this face. Defaults to minecraft:brick.

Dispenser and Dropper

Additional fields for dispenser and dropper:

• : The block entity's root tag.
  •  Items: List of items in this container.
    • : An item, including the slot tag.
      •  Slot: The inventory slot the item is in.
      • Tags common to item stack
  •  LootTable: (May not exist) Loot table to be used to fill the chest when it is next opened, or the items are otherwise interacted with.
  •  LootTableSeed: (May not exist) Seed for generating the loot table. 0 or omitted use a random seed.

Enchanting Table

Additional fields for enchanting table:

• : The block entity's root tag.
  •  CustomName: (May not exist) The name of this enchanting table.
  •  rott: The rotation of the book. ^{[more information needed]}

End Gateway

Additional fields for end gateway:

• : The block entity's root tag.
  •  Age: Age of the portal, in ticks. This is used to determine when the beam is rendered.
  •  ExitPortal: Location entities are teleported to when entering the portal.
    • : X coordinate of target location.
    • : Y coordinate of target location.
    • : Z coordinate of target location.

Flower Pot

Additional fields for flower pot:

• : The block entity's root tag.
  •  PlantBlock: (May not exist) The block in the pot.
    • Tags common to block

Furnace

Additional fields for furnace, smoker, and blast furnace:

• : The block entity's root tag.
  •  BurnDuration: The total time that in ticks that the currently used fuel can burn.
  •  BurnTime: Number of ticks left before the current fuel runs out.
  •  CookTime: Number of ticks the item has been smelting for. The item finishes smelting when this value reaches 200 (10 seconds). Is reset to 0 if BurnTime reaches 0.^{[needs testing]}
  •  Items: List of items in this container.
    • : An item in the furnace, including the slot tag.
      •  Slot: The inventory slot the item is in.
      • Tags common to item stack
  •  StoredXPInt: The number of experiences it stores.

Hopper

Additional fields for hopper:

• : The block entity's root tag.
  •  Items: List of items in this container.
    • : An item, including the slot tag.
      •  Slot: The inventory slot the item is in.
      • Tags common to item stack
  •  TransferCooldown: Time until the next transfer in game ticks, naturally between 1 and 8 or 0 if there is no transfer.

Item Frame

Additional fields for item frame:

• : The block entity's root tag.
  •  Item: The items in this item frame.
    • Tags common to item stack
  •  ItemDropChance: (May not exist) The chance of item dropping when the item frame is broken.
  •  ItemRotation: (May not exist) The rotation of the item in the item frame.

Jigsaw

Additional fields for jigsaw:

• : The block entity's root tag.
  •  final_state: The block that this jigsaw block becomes.
  •  joint: The joint option value, either "rollable" or "aligned".
  •  name: The jigsaw block's name. This jigsaw block will be aligned with another structure's jigsaw block which has this value in the target tag.
  •  target: The jigsaw block's target name. This jigsaw block will be aligned with another structure's jigsaw block which has this value in the name tag.
  •  target_pool: The jigsaw block's target pool to select a structure from.

Jukebox

Additional fields for jukebox:

• : The block entity's root tag.
  •  RecordItem: (May not exist) The record item in it.
    • Tags common to item stack

Lectern

Additional fields for lectern:

• : The block entity's root tag.
  •  book: (May not exist) The book item currently on the lectern.
    • Tags common to item stack
  •  hasBook: 1 or 0 (true/false) - (may not exist) true if it has a book.
  •  page: (May not exist) The page the book is currently on, starting from 0.
  •  totalPages: (May not exist) The total pages the book has.

Lodestone

Additional fields for lodestone:

• : The block entity's root tag.
  •  trackingHandle: (May not exist) The id of lodestone.

Monster Spawner

Additional fields for monster spawner:

• : The block entity's root tag.
  • Tags common to monster spawner

Moving Block

Additional fields for moving block:

• : The block entity's root tag.
  •  movingBlock: The main layer of moving block represented by this block entity.
    • Tags common to block
  •  movingBlockExtra: The extra moving block layer represented by this block entity.
    • Tags common to block
  •  movingEntity: (May not exist) The block entity stored in this moving block.
    • Tags common to block entity
  •  pistonPosX: X coordinate of the piston base.
  •  pistonPosY: Y coordinate of the piston base.
  •  pistonPosZ: Z coordinate of the piston base.

Note Block

Additional fields for note block:

• : The block entity's root tag.
  •  note: The pitch of the note block.

Nether Reactor

Additional fields for nether reactor:

• : The block entity's root tag.
  •  HasFinished: 1 or 0 (true/false) - true if the reactor has completed its activation phase, and has gone dark.
  •  IsInitialized: 1 or 0 (true/false) - true if the reactor has been activated, and has turned red.
  •  Progress: Number of ticks the reactor has been active for. It finishes after 900 game ticks (45 seconds).

Piston

Additional fields for piston:

• : The block entity's root tag.
  •  AttachedBlocks: The list of positions of blocks it should move.
    • : A block's X coordinate.
    • : A block's Y coordinate.
    • : A block's Z coordinate.
    • : Another block's X coordinate.
    • : Another block's Y coordinate.
    • : Another block's Z coordinate.
    • : etc.
  •  BreakBlocks: The list of positions of blocks it should break.
    • : A block's X coordinate.
    • : A block's Y coordinate.
    • : A block's Z coordinate.
    • : Another block's X coordinate.
    • : Another block's Y coordinate.
    • : Another block's Z coordinate.
    • : etc.
  •  LastProgress: Progress in last tick.
  •  NewState: Next state. Can be 0 (unextended), 1 (pushing), 2 (extended), or 3 (pulling).
  •  Progress: How far the block has been moved. Can be 0.0, 0.5, and 1.0.
  •  State: Current state.
  •  Sticky: 1 or 0 (true/false) - true if this piston is sticky.

Sculk Catalyst

Additional fields for sculk catalyst:

• : The block entity's root tag.
  •  cursors: List of charges associated with the sculk catalyst.
    • : A charge.
      •  charge: How much power is in the charge.
      •  decay: Be 1 if the charge was spread from a sculk or sculk vein, 0 otherwise. The charge can spread to any block if this tag is 1. If it is 0, all the powers in the charge disappear when it spreads to a block not in sculk family.^{[needs testing]}
      •  facing: ^{[more information needed]}
      •  update: Delay in ticks until the charge begins to travel after being created.^{[needs testing]}
      •  x: X coordinate of the charge.
      •  y: Y coordinate of the charge.
      •  z: Z coordinate of the charge.

Sculk Shrieker, Sculk Sensor, and Calibrated Sculk Sensor

Additional fields for sculk shrieker, sculk sensor, and calibrated sculk sensor:

• : The block entity's root tag.
  •  VibrationListener: The vibration event listener of the sculk shrieker, sculk sensor, and calibrated sculk sensor.
    •  event: Unknown.
    •  pending: Unknown.
      •  distance: Unknown.
      •  source: Unknown.
      •  vibration: Unknown.
      •  x: Unknown.
      •  y: Unknown.
      •  z: Unknown.
    •  selector: Unknown.
    •  ticks: Unknown.

Shulker Box

Additional fields for shulker box:

• : The block entity's root tag.
  • Tags common to chests
  •  facing: The facing of this shulker box.^{[more information needed]}

Sign and Hanging Sign

Additional fields for sign and hanging sign:

• : The block entity's root tag.
  •  BackText: A compound which discribes back text. The same structure as  FrontText.
  •  FrontText: A compound which discribes front text.
    •  HideGlowOutline: 1 or 0 (true/false) - true if the outer glow of a sign with glowing text does not show.
    •  IgnoreLighting: 1 or 0 (true/false) - true if the sign has been dyed with a glow ink sac.
    •  PersistFormatting: Unknown. Defaults to 1.
    •  SignTextColor: The color that has been used to dye the sign. Is a 32-bit encoded color, defaults to -16777216 (black). One of -986896 for "White", -425955 for "Orange", -3715395 for "Magenta", -12930086 for "Light Blue", -75715 for "Yellow", -8337633 for "Lime", -816214 for "Pink", -12103854 for "Gray", -6447721 for "Light Gray", -15295332 for "Cyan", -7785800 for "Purple", -12827478 for "Blue", -8170446 for "Brown", -10585066 for "Green", -5231066 for "Red", and -16777216 for "Black".
    •  Text: The text on it.
    •  TextOwner: Unknown.
  •  IsWaxed: 1 or 0 (true/false) - true if the text is locked with honeycomb.

Skull

Additional fields for skull:

• : The block entity's root tag.
  •  MouthMoving: 1 or 0 (true/false) - true if this dragon head's mouth is moving.
  •  MouthTickCount: The animation frame of the dragon head's mouth movement.^{[needs testing]}
  •  Rotation: The rotation of this skull.^{[more information needed]}
  •  SkullType: The type of this skull. 0 = Skeleton, 1 = Wither Skeleton, 2 = Zombie, 3 = Player, 4 = Creeper, 5 = Ender Dragon, 6 = Piglin.

Structure Block

Additional fields for structure block:

• : The block entity's root tag.
  •  animationMode: The mode of animation.^{[more information needed]}
  •  animationSeconds: The duration of the animation.^{[more information needed]}
  •  data: The mode of the structure block, values for data are the same as the data values for the item. Ex. 0 = Data, 1 = Save, 2 = Load, 3 = Corner, 4 = Inventory, 5 = Export.
  •  dataField: Unknown.
  •  ignoreEntities: 1 or 0 (true/false) - true if the entities should be ignored in the structure.
  •  integrity: How complete the structure is that gets placed.
  •  isPowered: 1 or 0 (true/false) - true if this structure block is being powered by redstone.
  •  mirror: How the structure is mirrored.^{[more information needed]}
  •  redstoneSaveMode: The current redstone mode of this structure block.^{[more information needed]}
  •  removeBlocks: 1 or 0 (true/false) - true if the blocks should be removed in the structure.
  •  rotation: Rotation of the structure.^{[more information needed]}
  •  seed: The seed to use for the structure integrity, 0 means random.^{[needs testing]}
  •  showBoundingBox: 1 or 0 (true/false) - true if show the structure's bounding box to players in Creative mode.
  •  structureName: Name of the structure.
  •  xStructureOffset: X-offset of the structure.
  •  yStructureOffset: Y-offset of the structure.
  •  zStructureOffset: Z-offset of the structure.
  •  xStructureSize: X-size of the structure.
  •  yStructureSize: Y-size of the structure.
  •  zStructureSize: Z-size of the structure.

Suspicious Block

Additional fields for suspicious sand and suspicious gravel:

• : The block entity's root tag.
  •  brush_count: The number of times the suspicious block is being brushed by the player, from 1 to 10 (the item will be extracted when it reaches 10). If the player stops brushing, it will progressively return to 0. And if it hasn't been brushed yet, defaults to 0.
  •  brush_direction: The direction of the suspicious block that was brushed. 0 = Down, 1 = Up, 2 = North, 3 = South, 4 = West, 5 = East, or 6 if it has not been brushed yet.
  •  item: (May not exist) The item in the suspicious block.
    • Tags common to item stack
  •  LootTable: (May not exist) Loot table to be used to generate the hidden item when brushed.
  •  LootTableSeed: (May not exist) Seed for generating the loot table. 0 or omitted use a random seed.
  •  type: The type of suspicious block. Valid types are minecraft:suspicious_sand and minecraft:suspicious_gravel.