> For the complete documentation index, see [llms.txt](https://xiaoxiami.gitbook.io/elasticsearch/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xiaoxiami.gitbook.io/elasticsearch/ji-chu/33-apis/342wen-dang-apis-document-apis.md).

# 3.4.2.文档 APIs (Document APIs)

## 单文档API <a href="#documentapis-dan-wen-dang-api" id="documentapis-dan-wen-dang-api"></a>

* [*Index API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-index_.html)
* [*Get API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-get.html)
* [*Delete API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-delete.html)
* [*Update API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-update.html)

## 多文档API <a href="#documentapis-duo-wen-dang-api" id="documentapis-duo-wen-dang-api"></a>

* [*Multi Get API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-multi-get.html)
* [*Bulk API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-bulk.html)
* [*Delete By Query API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-delete-by-query.html)
* [*Update By Query API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-update-by-query.html)
* [*Reindex API*](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-reindex.html)

> 注意:所有的单文档的CRUD API，`index`参数只能接受单一的索引库名称，或者是一个指向单一索引库的`alias`。