{
  "settings" : {
    "index" : {
      "number_of_shards" : 1, 
      "number_of_replicas" : 0
    }
  },
  "mappings": {
    "properties": {
      "time": { "type": "date", "format": "date_time_no_millis" },
      "source_system": { "type": "keyword"},
      "nuc": { "type": "keyword"},
      "field": { "type": "keyword" },
      "before": { "type": "text" },
      "after": { "type": "text" }
    }
  }
}