{
  "id": "placeholder.json",
  "$schema": "http://json-schema.org/draft-04/schema",
  "title": "HTML placeholder",
  "description": "Placeholder for content being shared",
  "type": [
    "object"
  ],
  "properties": {
    "type": {
      "description": "Block type",
      "example": "placeholder",
      "type": "string",
      "enum": [
        "placeholder"
      ]
    }
  },
  "required": [
    "type"
  ]
}