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| The '''Slot''' data structure is how Minecraft represents an item and its associated data in the [[Protocol|Minecraft Protocol]].
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| === Slot ===
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| {| class="wikitable"
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| ! Name
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| ! Type
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| ! Meaning
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| |-
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| | Present
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| | {{Type|Boolean}}
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| | True if there is an item in this position; false if it is empty.
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| |-
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| | Item ID
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| | {{Type|Optional}} {{Type|VarInt}}
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| | Omitted if present is false. The {{Minecraft Wiki|Java Edition data values#Blocks|item ID}}. Item IDs are distinct from block IDs; see [[Data Generators]] for more information
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| |-
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| | Item Count
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| | {{Type|Optional}} {{Type|Byte}}
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| | Omitted if present is false.
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| |-
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| | NBT
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| | {{Type|Optional}} {{Type|NBT}}
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| | Omitted if present is false. If 0 (TAG_End), there is no NBT data, and no further data follows. Otherwise the byte is the start of an NBT blob as shown below:
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| |}
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| <pre>
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| COMPOUND
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| LIST 'StoredEnchantments'
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| COMPOUND
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| STRING 'id'
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| SHORT 'lvl'
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| END
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| COMPOUND
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| ...
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| END
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| ...
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| END
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| INT 'Unbreakable'
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| ...
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| END
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| </pre>
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| Note that on old versions, the enchantment id was sent as a SHORT, and not as a STRING.
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| Since 1.20.2 the root compound also has no name anymore. The NBT data starts with one byte indicating the type, followed by the type-specific data.
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| See [[NBT]] for more information about the NBT format, and {{Minecraft Wiki|Player.dat format#Item structure|here}} for the contained information and its format. Note that tool durability is included in NBT, among other things.
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| == Examples ==
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| <pre>
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| 00 | empty slot
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| 01 01 01 00 | a stone block
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| 01 01 01 03 12 34 56 78 | a stone block with (made-up) NBT data
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| </pre>
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| [[Category:Protocol Details]]
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| [[Category:Minecraft Modern]]
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