OMRChecker/samples/answer-key/using-csv/evaluation.json

{
  "source_type": "csv",
  "options": {
    "answer_key_csv_path": "answer_key.csv",
    "should_explain_scoring": true
  },
  "marking_schemes": {
    "DEFAULT": {
      "correct": "1",
      "incorrect": "0",
      "unmarked": "0"
    }
  }
}