anchor.diff:     }
   }
   --------------------------------
  +// CONSOLE
   
   <1> For graded relevance ratings only ratings above this threshold are
   considered as relevant results for the given query. By default this is set to 1.
  
positive.code:                         "query": "{{query_string}}"}}}}},  <1>
    "requests": [
    {
        "id": "JFK query"
        "ratings": [
          {
            "rating": 1.5,
  
negative.code: 
  [source,js]
  --------------------------------
  GET /index/type/_rank_eval
  {
      "requests": [
      {
          "id": "JFK query", 
          "request": { "query": { "match_all": {}}},
          "ratings": []  
      }],
      "metric": {
         "dcg": {
              "normalize": false                          <1>
         }
      }
  }
  --------------------------------
  // CONSOLE
  
  <1> Set to true to compute nDCG instead of DCG, default is false.
  
  