{
  "$schema": "http://json-schema.org/schema#",
  "$ref": "#/definitions/commitTypes",
  "definitions": {
    "commitTypes": {
      "type": "object",
      "properties": {
        "commitTypes": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z]+$"
          }
        }
      },
      "additionalProperties": false
    }
  }
}