I made a diagramm of the default crafting recipes in Minetest.
- black arrow: normal crafting
- green arrow: drop
- red arrow: cooking
- purple arrow: item is in the same crafting group; can be used in the same recipes
- light blue arrow: sapling growing and sapling drop from leaves
- yellow arrow: water hitting lava
- blue name: item is generated in the world
- red name: furnace; item can cook other items
- red box: item can be used as fuel
- orange filled box: item is used to craft tools (pick, shovel, axe and sword)