example.json

// course.json
  "_branching": {
    "_isEnabled": true
  }

// articles.json
  "_branching": {
    "_isEnabled": true,
    "_comment": "Leave _start blank to start on the first block in the article",
    "_start": ""
  },

// blocks.json
  "_branching": {
    "_correct": "b-255",
    "_partlyCorrect": "b-260",
    "_incorrect": "b-270"
  }

// blocks.json - When using attempt-based branching
  "_branching": {
    "_hasAttemptBands": true,
    "_useQuestionAttempts": false,
    "_attemptBands": [
      {
        "__comment": "2nd attempt",
        "_attempts": 2,
        "_correct": "b-255",
        "_partlyCorrect": "b-260",
        "_incorrect": "b-270"
      },
      {
        "__comment": "3rd - 4th attempt",
        "_attempts": 3,
        "_correct": "b-255",
        "_partlyCorrect": "b-260",
        "_incorrect": "b-270"
      },
      {
        "__comment": "5th+ attempt",
        "_attempts": 5,
        "_correct": "b-255",
        "_partlyCorrect": "b-260",
        "_incorrect": "b-270"
      }
    ],
    "__comment": "correct at any other attempt",
    "_correct": "b-255",
    "__comment": "partlyCorrect at any other attempt",
    "_partlyCorrect": "b-260",
    "__comment": "incorrect at any other attempt",
    "_incorrect": "b-270"
  }