minecraft-bedrock-json-schemas/source/general/format_version.json

{
  "$id": "format_version",
  "title": "Format Version",
  "description": "A version that tells minecraft what type of data format can be expected when reading this file.",
  "pattern": "^(1)\\.([0-9]+)\\.([0-9]+)$",
  "type": "string",
  "enum": ["1.17.30", "1.17.0", "1.16.0", "1.15.0", "1.14.0", "1.13.0", "1.12.0", "1.10.0", "1.8.0"]
}