File	Source	Description	Used for
`banner_patterns.json`	Manually written	All known banner pattern types and their crafting requirements. Not currently auto-generated.	Not currently used
`biome_definitions.json`	Vanilla packet traces	JSON representation of basic biome definitions obtained from `BiomeDefinitionListPacket`. Note that the client-side chunk generation data is not included.	Populating `BiomeDefinitionListPacket` in a server
`biome_id_map.json`	BDS mod	Mapping of Minecraft string biome IDs to their legacy integer ID counterparts	Network serializing chunks
`block_id_to_item_id_map.json`	BDS mod	Map of block string IDs to item IDs. Usually these are the same, but differ in a few cases such as for some doors.	Saving blocks to disk in inventories
`block_properties_table.json`	BDS mod	Basic data for all known block types, such as hardness, opacity etc	Implementing new blocks & behaviour parity
`block_state_meta_map.json`	BDS mod	List of meta values for each state ID in `canonical_block_states.nbt`	Populating `CraftingDataPacket`
`canonical_block_states.nbt`	BDS mod	List of `TAG_Compound` (in varint NBT format), one for each predefined blockstate. The network ID of a state is its position in the list.	Network serializing block updates, chunks etc.
`command_arg_types.json`	BDS mod	All known command arg types and identifiers	Generating constants for `AvailableCommandsPacket`
`entity_id_map.json`	Vanilla packet traces	List of legacy numeric save IDs and their string counterparts	Upgrading old entity save data
`entity_identifiers.nbt`	Vanilla packet traces	Entity type definitions for `AvailableActorIdentifiersPacket`	Populating `AvailableActorIdentifiersPacket` in a server
`enums.py`	Manually written	Script for scraping enum definitions from the protocol spec	Scraping enums for easier code generation data sources
`item_tags.json`	BDS mod	All known item tags and the IDs they contain	Parsing crafting recipes from `CraftingDataPacket`
`level_sound_id_map.json`	BDS mod	All known sound IDs for `LevelSoundEventPacket`	Generating constants for `LevelSoundEventPacket`
`protocol_info.json`	Binary analysis script	Version info and packet ID list	Generating barebones code for protocol updates
`r12_to_current_block_map.bin`	BDS mod	Mapping of 1.12 block ID/meta to the current version's blockstate NBT	No longer used as of PM5, slated for removal
`r16_to_current_item_map.json`	BDS mod	Mappings for legacy item ID/meta to new IDs	Generating schemas for BedrockItemUpgradeSchema
`required_item_list.json`	Vanilla packet traces	Network dictionary of string item ID -> network ID	Network serializing itemstacks
`creative/*.json`	Vanilla packet traces	Creative inventory contents, split by tab	Supporting creative inventory as a server
`enums/*json`	Scraped from protocol spec	Useful enum values	Code generation
`recipes/*.json`	Vanilla packet traces	Crafting, smelting, brewing recipe definitions	Supporting crafting, smelting & brewing as a server