# Can someone explain how "analysis" is used on this mapping?

**URL:** <https://discuss.elastic.co/t/can-someone-explain-how-analysis-is-used-on-this-mapping/233503>\
**Category:** Elasticsearch\
**Created:** [May 20, 2020, 9:57am UTC](https://discuss.elastic.co/t/can-someone-explain-how-analysis-is-used-on-this-mapping/233503 "2020-05-20T09:57:05Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![anto\_gian](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/anto_gian/32/51937_2.png) [@anto\_gian](https://discuss.elastic.co/u/anto_gian)\
**Post date:** [May 20, 2020, 9:57am UTC](https://discuss.elastic.co/t/can-someone-explain-how-analysis-is-used-on-this-mapping/233503/1 "2020-05-20T09:57:05Z")

</div>

This is my mapping. I can't understand what is "analysis" under settings object. The filters and analyzers specified under analysis are used against "my-field-id property"?

```
 {
      "my-id" : {
    "aliases" : {
      "alias-1" : { },
      "alias-2" : { },
      "alias-3" : { },
      "alias-4" : { }
    },
    "mappings" : {
      "properties" : {
        "my-field-id" : {
          "type" : "text",
          "fields" : {
            "not_analyzed" : {
              "type" : "keyword"
            }
          },
          "analyzer" : "autocomplete",
          "search_analyzer" : "search_autocomplete"
        }
      }
    },
    "settings" : {
      "index" : {
        "number_of_shards" : "1",
        "provided_name" : "my-id",
        "creation_date" : "1588792793202",
        "analysis" : {
          "filter" : {
            "word_delimeter" : {
              "type" : "word_delimiter",
              "preserve_original" : "true",
              "split_on_numerics" : "false"
            },
            "autocomplete_filter" : {
              "type" : "edge_ngram",
              "min_gram" : "1",
              "max_gram" : "500"
            }
          },
          "analyzer" : {
            "search_autocomplete" : {
              "filter" : [
                "lowercase",
                "unique"
              ],
              "char_filter" : [
                "char_normalizer"
              ],
              "tokenizer" : "whitespace"
            },
            "autocomplete" : {
              "filter" : [
                "lowercase",
                "autocomplete_filter"
              ],
              "char_filter" : [
                "char_normalizer"
              ],
              "type" : "custom",
              "tokenizer" : "whitespace"
            }
          },
          "char_filter" : {
            "char_normalizer" : {
              "type" : "mapping",
              "mappings" : [
                "-=>\\u0020"
              ]
            }
          }
        },
        "number_of_replicas" : "1",
        "uuid" : "my-uuid",
        "version" : {
          "created" : "7071200"
        }
      }
    }
      }
    }
```

---

<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [May 20, 2020, 10:12am UTC](https://discuss.elastic.co/t/can-someone-explain-how-analysis-is-used-on-this-mapping/233503/2 "2020-05-20T10:12:31Z")

</div>

In your mapping you referenced two analyzers:

```auto
"analyzer" : "autocomplete",
"search_analyzer" : "search_autocomplete"

```

You defined them in the `analysis` part of the settings.

Was that your question?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 17, 2020, 10:39am UTC](https://discuss.elastic.co/t/can-someone-explain-how-analysis-is-used-on-this-mapping/233503/4 "2020-06-17T10:39:40Z")

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