Command storage format

This feature is exclusive to Java Edition.

 

The command_storage_<namespace>.dat files are gzip compressed NBT files located in the data folder in a savegame. They store information about the /data command storage in the world. Each namespace in the storage has its own data file.

Usage

The command storage of NBT data is an efficient way for commands to access or save NBT data without an overhead for block entities or entities reading from or writing to the NBT data.

Each command storage is a general purpose, key-value storage, identified by a resource location to prevent unintentional conflicts.

/data get, /data modify, and /execute (if|unless) data can read from the storage, while /data merge, /data modify, /data remove, and /execute store can write to the storage.

The storage can also be accessed by text components.

Directory structure

Multiple command_storage_<namespace>.dat files may be present in the data directory.

NBT structure

Multiple [NBT Compound / JSON Object] compound tags of different names may exist under [NBT Compound / JSON Object] contents tag.

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