{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "datasets": {
      "maxItems": 4,
      "minItems": 4,
      "type": "array"
    },
    "groups": {
      "minItems": 3,
      "type": "array"
    },
    "normalisation": {
      "type": "string"
    }
  },
  "required": [
    "groups",
    "datasets",
    "normalisation"
  ],
  "type": "object"
}