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This a list of groups which are shared across multiple mods and games, or groups which have been accepted by the community to have a standard meaning.
not_in_creative_inventory=1: This item must not appear in the creative inventory
not_in_craft_guide=1: Crafting recipes which have this item as a result will not be shown in a crafting guide. The item may still be shown as an ingredient.
For dyes, the color groups used in Minetest Game have been widely accepted. If you add a dye, you should add the appropriate groups. The groups have names like
These groups are used to classify something. The rating is assumed to be 1. These groups mean that the item in question is something. E.g. the group “
tree=1” means the item is a tree trunk.
tree: Tree trunk
leaves: Leaves, (pine) needles, and the like
stone: Stone or stone-like materials
water: Water (source or flowing)
lava: Lava (source or flowing)
wood: Block of wooden planks
wool: Block of wool
Items and tools
hoe: Hoe (farming tool)
fleshy: De facto considered the “default” damage group for players and mobs when a game has no sophisticated damage system and everything is considered to be in the same “damage class”. Otherwise, intended for living things like animals and the player. This could imply some blood effects when hitting.