{
  "$id": "ref.schema.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "ref",
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "description": "Type of object referred to",
      "enum": [ "resource", "document" ]
    },
    "uri": {
      "type": "string",
      "description": "URI of the object referred to"
    }
  }
}