Tuple

Full example here

    {
      "name": "person",
      "schemaType": "requiredGroup",
      "fields": [
        {
          "name": "name",
          "schemaType": "optional",
          "physicalType": "BINARY",
          "logicalType": "STRING"
        },
        {
          "name": "age",
          "schemaType": "required",
          "physicalType": "INT32"
        }
      ],
      "data": [
        {
          "name": "Alice",
          "age": 30
        },
        {
          "name": "Bob",
          "age": 25
        }
      ]
    }