{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Link",
  "type": "object",
  "description": "A reference to another portion of a document or an external URL.",
  "properties": {
    "url": {
      "type": "string",
      "description": "An external URI."
    },
    "bookmarkId": {
      "type": "string",
      "description": "The ID of a bookmark in this document."
    },
    "headingId": {
      "type": "string",
      "description": "The ID of a heading in this document."
    },
    "tabId": {
      "type": "string",
      "description": "The ID of a tab in this document."
    }
  }
}