QuestionnaireDefinition

{
    "schema_version": 1,
    "questionnaire_id": "tanken_v1",
    "title": "string",
    "activity_type": "string",
    "questions": [
        {
            "id": "string",
            "type": "text",
            "label": "string",
            "required": false,
            "default_value": null,
            "readonly": false,
            "unit": "string",
            "max_files": 0,
            "options": [
                "string"
            ],
            "validation": {
                "min": 0,
                "max": 0,
                "minlength": 0,
                "maxlength": 0,
                "regex": "string"
            },
            "visible_if": {
                "question_id": "string",
                "operator": "eq",
                "value": null
            },
            "questions": [
                {}
            ],
            "formula": "string"
        }
    ]
}