create-index.json

PUT /first_index HTTP/1.1
{
  "settings": {
    "number_of_shards": 1,
    "number_of_replicas": 0,
    "analysis": {
      "analyzer": {
        "default": {
          "filter": [
            "lowercase",
            "asciifolding",
          ],
          "tokenizer": "standard"
        }
      }
    }
  },
  "mappings": {
    "city": {
      "properties": {
        "name": {
          "type": "text",
          "analyzer": "default",
          "fields": {
            "sortable": {
              "type": "keyword",
              "index" : false
            }
          }
        }
      }
    }
  }
}