vega从elasticsearch上传源数据

Question

我是vega的新手，我需要知道弹性搜索中是否有以下示例数据，如何格式化vega中的代码以正确解析它们。 请记住，我需要解析它们取决于时间戳。

{
  "took": 4,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 288,
    "max_score": 1,
    "hits": [
      {
        "_index": "test index",
        "_type": "timeWindow",
        "_id": "rC_OkmoBUu7gT1VYBBFh",
        "_score": 1,
        "_source": {
          "timestamp": "2018-09-10T00:20:00",
          "first INDICATORS": {
            "standard deviation": 36.213503918271975,

           }

           "Second INDICATORS":{
              " Betweeness":0.3472
             }    
           "Third Indicator":{
              "centrality":0.2221
           }

我尝试使用：format:{property:"hits.hits"}