The SCHEMATIC file format is characteristic of a software utility called MCEdit. It is a map and world editor for the popular Minecraft game. The SCHEMATIC file is used to store various objects used in the game. These can be buildings, terrain layout, water reservoirs or some characters from the game. Often they are also other block layouts.

Minecraft is an open world game where all the objects you build are based on cubic cubes (called blocks in the game).