{
  "metadata": {
    "title": "Example OPDS Catalog"
  },
  "links": [
    {"rel": "self", "href": "http://example.com/opds", "type": "application/opds+json"}
  ],
  "navigation": [
    {
      "href": "/new",
      "title": "New Learning Units",
      "type": "application/opds+json",
      "rel": "current"
    },
    {
      "href": "/popular",
      "title": "Popular Learning Units",
      "type": "application/opds+json",
      "rel": "http://opds-spec.org/sort/popular"
    }
  ]
}