Quick Question JSON API format

1

Is this format is a correct format based on JSONAPI specs. Can we have an array as attributes?

{
  "meta": {
  },
  "links": {
    "self": ""
  },
  "jsonapi": {
    "version": "",
    "meta": {
    }
  },
  "data": {
    "type": "typeof(class)",
    "id": "string",
    "attributes": [
      {
        "item1": "Value1",
        "item2": "Value2",
        "item3": "Value3"
      }
    ],
    "links": {
      "self": ""
    }
  }
}
2

No. This is not a valid accordingly to JSON:API specification.

7.2.2.1 Attributes

The value of the attributes key MUST be an object (an “attributes object”). Members of the attributes object (“attributes”) represent information about the resource object in which it’s defined.

Attributes may contain any valid JSON value, including complex data structures involving JSON objects and arrays.

JSON:API — Latest Specification (v1.1)

The value of an attribute may be complex data structure like an array. This would be valid:

{
  "type": "person",
  "id": "27",
  "attributes": {
    "interests": ["football", "politics", "history"]
  }
}

I would recommend being careful using objects and arrays as attribute values. Often it is better modeled as a relationship to another resource. As illustrated by the example I have included above.