Minecraft wiki entry for Data_pack, associated text: This folder contains all the data under one or multiple namespaces. It can contain advancements, dimension, dimension_type, functions, loot_tables, predicates, recipes, structures, tags and/or worldgen, folders. The worldgen folder can contain biome, configured_carver, configured_feature, configured_structure_feature, configured_surface_builder, noise_settings, processor_list and template_pool folders.