Which of the three JSON options for BPMN is correct?

The correct JSON for BPMN depends on the standard and the tool you are using. Usually, BPMN is described in XML format, but some tools support a JSON representation. In a proper JSON for BPMN, process elements such as tasks, events, gateways, sequence flows, and their attributes (id, name, type, etc.) should be clearly structured.

For example, a correct JSON should contain keys that reflect the process structure, not just a set of arbitrary objects. Here's a simplified example of the structure:

{
  "process": {
    "id": "process_1",
    "name": "Sample Process",
    "flowElements": [
      {"id": "task_1", "name": "Task 1", "type": "task"},
      {"id": "startEvent_1", "name": "Start", "type": "startEvent"},
      {"id": "sequenceFlow_1", "sourceRef": "startEvent_1", "targetRef": "task_1", "type": "sequenceFlow"}
    ]
  }
}

If one of the three JSON options matches this logic and structure, it will be correct. It is important that the JSON reflects the semantics of BPMN, not just that it is valid JSON.