View source for Minecraft:Tag (item)

{{About|the April Fools' Day joke item|other uses|Tag}}
{{joke feature}}
{{Infobox item
| title = Tag
| image = Tag.png
| renewable = Yes
| stackable = Yes (64)
}}
'''Tags''' and '''Bits''' are items exclusive to the [[Minecraft:Java Edition 23w13a or b|23w13a_or_b]] [[Minecraft:April Fools' Day jokes#2023|April Fools' joke]] snapshot from 2023. They are used to craft in-game representations of [[Minecraft:NBT format|NBT tags]].

== Obtaining ==
A [[Minecraft:stonecutter]] can be used to cut a [[Minecraft:name tag]] into either 16 "Name" or 16 "Tag" items. These can be cut into 16 Bit items each.

{{Stonecutting
|head=1
|showdescription=1
|Name Tag
|Name, 16; Tag, 16
|description=The resulting "Name" items must be named in an [[Minecraft:anvil]].
}}
{{Stonecutting
|showdescription=
|Name; Tag
|Bit, 16
|foot=1
}}

To be able to proceed from here the <code>nbt_crafting</code> vote must be approved. Bits can be used in a crafting table to craft Left Curly, Right Curly, Left Square, and Right Square.

A [[Minecraft:crafting table]] can be used to convert a "Tag" item into a "Byte Tag." The amount of [[Minecraft:stick]]s added to the crafting recipe specifies the value of the Byte, as a [[Minecraft:wikipedia:Signed number representations#Two's complement|signed 8-bit value]]. For example, a "Tag" and a full stack of sticks make a Byte with the value <code>64b</code>, while 255 sticks result in <code>-1b</code>. Only one of the sticks is consumed. Two Bytes can be crafted into a "Short Tag" (equivalent to 16 bit), two Shorts into an "Int Tag" (equivalent to 32 bit), and two Ints into a "Long Tag" (equivalent to 64 bit). Many other combinations that form either 16, 32, or 64 bit are possible. For example, two Shorts and an Int make a Long. When combining values, their digits are stuck together in the given order, e.g. <code>1b</code> and <code>0b</code> make <code>256s</code> (equivalent to 0100<sub>16</sub> in [[Minecraft:wikipedia:Hexadecimal|hexadecimal]]). Undoing any of these crafting actions in e.g. a stonecutter is not possible.

"Float" and "Double Tags" can be crafted by adding one or two [[Minecraft:boat]]s to any numeric tag. A "String Tag" is crafted with a "Tag" and a piece of [[Minecraft:string]].

{{Crafting
|head=1
|showdescription=1
|A1= Bit;    ; Bit; Bit |B1=    ; Bit; Bit; Bit
|A2=    ; Bit; Bit;     |B2= Bit;    ;    ; Bit
|A3= Bit;    ; Bit; Bit |B3=    ; Bit; Bit; Bit
|Output= Right Curly; Left Curly; Left Square; Right Square
|ignoreusage=1
}}
{{Crafting
|Tag
|String
|Output= String Tag
|description=String tags must be named in an [[Minecraft:anvil]] to set their value.
|ignoreusage=1
}}
{{Crafting
|Tag; Tag;   Tag
|;    Stick; Stick, 64
|;    ;      Stick, 63
|Output= Byte Tag; Byte Tag; Byte Tag
|description=Only 1 stick is consumed. 128 and more sticks make [[Minecraft:wikipedia:Signed number representations#Two's complement|two's complements]]:
128 sticks = <code>-128b</code><br>
129 sticks = <code>-127b</code><br>
⋮<br>
254 sticks = <code>-2b</code><br>
255 sticks = <code>-1b</code>
|ignoreusage=1
}}
{{Crafting
|Byte Tag; Byte Tag; Byte Tag
|Byte Tag; Byte Tag; Byte Tag
|        ; Byte Tag; Byte Tag
|        ; Byte Tag; Byte Tag
|        ;         ; Byte Tag
|        ;         ; Byte Tag
|        ;         ; Byte Tag
|        ;         ; Byte Tag
|Output= Short Tag; Int Tag; Long Tag
|description=Shorts and Ints can be combined the same way, even mixed.

Digits are appended, e.g. two <code>1b</code> tags make <code>257s</code> (0101<sub>16</sub> in [[Minecraft:wikipedia:Hexadecimal|hexadecimal]]).
|ignoreusage=1
}}
{{Crafting
|Byte Tag; Short Tag; Int Tag; Long Tag
|Any Boat; Any Boat; Any Boat; Any Boat
|Output= Float Tag; Float Tag; Float Tag; Float Tag
|ignoreusage=1
}}
{{Crafting
|Byte Tag; Short Tag; Int Tag; Long Tag
|Any Boat; Any Boat; Any Boat; Any Boat
|Any Boat; Any Boat; Any Boat; Any Boat
|Output= Double Tag; Double Tag; Double Tag; Double Tag
|ignoreusage=1
}}
{{Crafting
|Left Curly;  Left Curly
|Name;        Name
|Byte Tag;    Byte Tag
|Right Curly; Name |; Byte Tag | |; Name |; Byte Tag |; Right Curly
|Output= Compound Tag; Compound Tag
|description=Instead of Bytes any other tag can be used, including other compound tags.
|ignoreusage=1
}}
{{Crafting
|Left Square;  Left Square
|Byte Tag;     Byte Tag
|Right Square; Byte Tag |; Byte Tag |; Byte Tag |; Byte Tag |; Byte Tag |; Byte Tag |; Right Square
|Output= List Tag; List Tag
|description=Instead of Bytes any other tag can be used, including other list tags.
|ignoreusage=1
}}
{{Crafting
|Compound Tag; List Tag
|Compound Tag; List Tag
|Output= Compound Tag; List Tag
|description=Up to 9 can be combined.

When compound tags contain identical names, only the latest of the corresponding values is used.
|ignoreusage=1
}}
{{crafting
|ingredients=Any incomplete or <br>invalid combination of tags
|A1=Left Curly; Left Curly; Left Curly; Left Square; Left Square
|B1=Name; Name; Name; Byte Tag; Byte Tag
|C1=Byte Tag; ; String Tag; ;Byte Tag
|A2= ; Name; ; ; Byte Tag
|B2= ; Byte Tag; ; ; Byte Tag
|C2= ; ; ; ; Byte Tag
|A3= ; Name; ; ; Byte Tag
|B3= ; Byte Tag; ; ; Byte Tag
|C3= ; ; ; ;
|Output=Sssyntax Error
|description=If the player makes a mistake in the NBT structure, a Sssyntax error item will appear in the result slot with one of the following error messages in the tooltip:
*Expected { or [
*Expected either single or double
*Unexpected entries in when casting to float
*Unexpected value after closing bracket
*OH NO INTERNAL ERROR
*Can't add element of type <''tag''> to list <''tag''>
*Unexpected value in list: expected either tag or closing bracket
*Expected closing bracket
*Expected tag after name
*Expected name
*INTERNAL ERROR OH NO
*Unexpected value in compound tag: expected either name, tag or closing bracket
*Total number of bytes (<''number''> exceeds 8 <!-- This missing parenthesis is intentional -->
*Can't concatenate <''tag''> with <''tag''>
*Number of bytes (<''number''>) is not power of 2
|ignoreusage=1
|foot=1
}}

"Name" and "String Tags" must be named in an [[Minecraft:anvil]] before they can be used. Unnamed Names and Strings always produce a "Sssyntax Error". None of the other tag items can be named.

All these items can be combined in a crafting table to form a short sequence of NBT data, as long as the resulting syntax is valid. For example: 
*A pair of Curlies that enclose a named "Name" item and some value, e.g. a Byte, create a "Compound Tag" with the content <code>{Example:0b}</code>.
**Because of the limited size of the crafting table only 3 name-value pairs can be put between Curlies at a time. Compound Tags of any length can be created by concatenating two or more Compound Tags.
**An empty pair of Curlies produces an empty Compound Tag with the content <code>{}</code>.
*A pair of Square brackets that enclose any number of values, e.g. 7 Bytes, create a "List Tag" with the content <code>[0b,0b,0b,0b,0b,0b,0b]</code>.
**Because of the limited size of the crafting table only 7 values can be put between Square brackets at a time. List Tags of any length can be created by concatenating two or more List Tags.
**An empty pair of Square brackets produces an empty List with the content <code>[]</code>.
**"Name" items cannot be used in a List.

The resulting Compound and List Tags can be used as values in other Compound and List Tags, as deeply nested as you want.

== Usage ==
Compound Tags with [[Minecraft:enchantment]] data will exhibit the traits of that enchantment.<ref>https://www.reddit.com/r/Minecraft/comments/129xdyl/i_figure_out_how_the_nbtcrafting_in_the_vote/</ref>

== Trivia ==
*This implies that a [[Minecraft:name tag]] is 256 bit.
*Compound and list tags are special in so far that the value they show in their [[Minecraft:tooltip]] is not merely a property of the item, but their ''actual'' [[Minecraft:NBT format|NBT data]]. This is also the reason why naming them is disabled as that would mess up the NBT data.
*The snapshot also contains an [[Minecraft:History of textures/Unused textures|unused texture]] for an {{ItemLink|End Tag}}.

== Issues ==
Issues relating to "Tag" and "Bit" are not maintained on the [[Minecraft:bug tracker]] because they're [[Minecraft:April Fools' joke]]s, and are therefore not in the newest stable version or snapshot. Issues reported there are closed as "Invalid".

== Gallery ==
=== Renders ===
<gallery>
Tag.png|Tag
Bit.png|Bit
Byte Tag.png|Byte Tag
Compound Tag.png|Compound Tag
Double Tag.png|Double Tag
End Tag.png|End Tag
Float Tag.png|Float Tag
Int Tag.png|Int Tag
Left Curly.png|Left Curly
Left Square.png|Left Square
List Tag.png|List Tag
Long Tag.png|Long Tag
Name (23w13a or b).png|Name
Right Curly.png|Right Curly
Right Square.png|Right Square
Short Tag.png|Short Tag
Sssyntax Error.png|Sssyntax Error
String Tag.png|String Tag
</gallery>

== References ==
{{reflist}}

== Navigation ==
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[[Category:Joke items]]

[[Minecraft:ja:Tag (アイテム)]]
[[Minecraft:pt:Edição Java 23w13a or b/Tag]]
[[Minecraft:zh:标签（物品）]]