# _type field 每個索引的文檔都與一個?**[_type](https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping-type-field.html)**（請參閱 “**[Mapping Types](https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping.html#mapping-type)[edit](https://github.com/elastic/elasticsearch/edit/5.3/docs/reference/mapping.asciidoc)**” 一節）以及一個?**[_id](https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping-id-field.html)?**相關聯。 為了使類型名稱快速搜索，**[_type](https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping-type-field.html)?**字段被索引。 該**?_type?**字段的值可以在查詢，聚合，腳本以及排序時訪問： | `# Example documents` `curl -XPUT?``'localhost:9200/my_index/type_1/1?pretty'`?`-H?``'Content-Type: application/json'`?`-d'` `{` `"text"``:?``"Document with type 1"` `}` `'` `curl -XPUT?``'localhost:9200/my_index/type_2/2?refresh=true&pretty'`?`-H?``'Content-Type: application/json'`?`-d'` `{` `"text"``:?``"Document with type 2"` `}` `'` `curl -XGET?``'localhost:9200/my_index/_search?pretty'`?`-H?``'Content-Type: application/json'`?`-d'` `{` `"query"``: {` `"terms"``: {` `"_type"``: [?``"type_1"``,?``"type_2"`?`]?``# 1` `}` `},` `"aggs"``: {` `"types"``: {` `"terms"``: {` `"field"``:?``"_type"``,?``# 2` `"size"``: 10` `}` `}` `},` `"sort"``: [` `{` `"_type"``: {?``# 3` `"order"``:?``"desc"` `}` `}` `],` `"script_fields"``: {` `"type"``: {` `"script"``: {` `"lang"``:?``"painless"``,` `"inline"``:?``"doc['_type']"`?`# 4` `}` `}` `}` `}` `'` | | 1 | 在?**_type?**字段上查詢 | | 2 | 在?**_type?**字段上聚合 | | 3 | 在?**_type?**字段上排序 | | 4 | 在腳本中訪問?**_type?**字段 |