{
  "type": "ImageObject",
  "subClassOf": "#MediaObject",
  "derivedFrom": "https://schema.org/ImageObject",
  "hasId": false,
  "requiredFields":[
    "type",
    "url"
  ],
  "inSpec": [
    "type",
    "thumbnail",
    "url",
    "contentUrl",
    "embedUrl",
    "width",
    "height"
  ],
  "notInSpec": [
    "contentUrl",
    "embedUrl"
  ],
  "fields": {
    "type": {
      "fieldName": "type",
      "requiredType": "https://schema.org/Text",
      "requiredContent": "ImageObject"
    },
    "thumbnail": {
      "fieldName": "thumbnail",
      "sameAs": "https://schema.org/thumbnail",
      "model": "ArrayOf#ImageObject",
      "description": [
        "The URL for a thumbnail image for an image."
      ]
    },
    "url": {
      "fieldName": "url",
      "sameAs": "https://schema.org/url",
      "requiredType": "https://schema.org/URL",
      "example": "http://example.com/static/image/speedball_large.jpg",
      "description": [
        "The URL for the display resolution image."
      ]
    }
  }
}