Sort question

Schema

A sort question:
- must satisfy the base-question schema
- must have an items property
- may have a solution property
The items property:
- must be an array
- must contain at least two items
- Each item:
  - must satisfy the content schema
  - must be unique
The solution property:
- must be an array
- must contain at least two items
- Each solution item:
  - must be unique
  - must be an object
  - must have an itemId property
  - must have a score property
  - The itemId property:
    - must be a string
  - The score property:
    - must be a number

Examples

Basic

{
  "id": "1",
  "type": "application/x.sort+json",
  "content": "Question ?",
  "items": [
    {
      "id": "2",
      "type": "text/plain",
      "data": "Item A"
    },
    {
      "id": "3",
      "type": "text/plain",
      "data": "Item B"
    }
  ]
}

Solution

{
  "id": "1",
  "type": "application/x.sort+json",
  "content": "Question ?",
  "items": [
    {
      "id": "2",
      "type": "image/jpg",
      "url": "http://domain.com/image-1.jpg"
    },
    {
      "id": "3",
      "type": "image/jpg",
      "url": "http://domain.com/image-2.jpg"
    },
    {
      "id": "4",
      "type": "image/jpg",
      "url": "http://domain.com/image-3.jpg"
    }
  ],
  "solution": [
    {
      "itemId": "3",
      "score": 1.5
    },
    {
      "itemId": "4",
      "score": 1
    },
    {
      "itemId": "2",
      "score": 0.5
    }
  ]
}

Extended

{
  "id": "1",
  "type": "application/x.sort+json",
  "meta": {
    "authors": [
      {
        "name": "John Doe"
      }
    ]
  },
  "content": "Question ?",
  "objects": [
    {
      "id": "42",
      "type": "text/plain",
      "url": "http://domain.com/text.txt"
    }
  ],
  "items": [
    {
      "id": "2",
      "type": "image/jpg",
      "url": "http://domain.com/image-1.jpg"
    },
    {
      "id": "3",
      "type": "image/jpg",
      "url": "http://domain.com/image-2.jpg"
    },
    {
      "id": "4",
      "type": "image/jpg",
      "url": "http://domain.com/image-3.jpg"
    }
  ],
  "solution": [
    {
      "itemId": "3",
      "score": 1.5
    },
    {
      "itemId": "4",
      "score": 1
    },
    {
      "itemId": "2",
      "score": 0.5
    }
  ],
  "feedback": "Lorem ipsum dolor sit amet"
}