metadata.json

{
    "name": "Merge two datasets",
    "description": "Merges two different datasets",
    "source_code": "script.whizzml",
    "inputs": [
        {
            "name": "dataset-1",
            "type": "dataset-id",
            "description": "First dataset"
        },
        {
            "name": "dataset-2",
            "type": "dataset-id",
            "description": "Second dataset"
        }
    ],
    "outputs": [
        {
            "name": "new-dataset",
            "type": "dataset-id",
            "description": "New dataset"
        }
    ]
}

script.whizzml

(define (create-new-dataset dataset-id-1 dataset-id-2)
  (create-and-wait-dataset {"origin_datasets" [dataset-id-1 dataset-id-2]}))
  
(define new-dataset (create-new-dataset dataset-1 dataset-2))