# SearchEngine

Location: [gRPC API](https://developer.m-files.com/APIs/gRPC-API/index.md) > [Reference](https://developer.m-files.com/APIs/gRPC-API/Reference/index.md) > [Enums](https://developer.m-files.com/APIs/gRPC-API/Reference/Enums/index.md)

HTML version: https://developer.m-files.com/APIs/gRPC-API/Reference/Enums/MFiles.SearchEngine/

SearchEngine enumeration.

- **Full name:** `MFiles.SearchEngine`
- **Proto file:** [`mfiles/enums.proto`](https://developer.m-files.com/APIs/gRPC-API/downloads/proto/mfiles/enums.proto)

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## Values

| Name | Number | Description |
|---|---|---|
| <a id="v-SEARCH_ENGINE_UNSPECIFIED"></a>`SEARCH_ENGINE_UNSPECIFIED` | 0 | Unspecified. |
| <a id="v-SEARCH_ENGINE_DT_SEARCH"></a>`SEARCH_ENGINE_DT_SEARCH` | 1 | dtSearch. |
| <a id="v-SEARCH_ENGINE_IDOL"></a>`SEARCH_ENGINE_IDOL` | 2 | IDOL. |
| <a id="v-SEARCH_ENGINE_AZURE_SEARCH"></a>`SEARCH_ENGINE_AZURE_SEARCH` | 3 | Azure search. |
| <a id="v-SEARCH_ENGINE_SMART_SEARCH"></a>`SEARCH_ENGINE_SMART_SEARCH` | 4 | Smart search |
| <a id="v-SEARCH_ENGINE_AINO_SEARCH"></a>`SEARCH_ENGINE_AINO_SEARCH` | 5 | Aino search |
| <a id="v-SEARCH_ENGINE_GOLDFISH"></a>`SEARCH_ENGINE_GOLDFISH` | 6 | Goldfish - stateless reference indexer. Indexes everything, finds nothing. For testing and performance measurement purposes. |

<a id="used-in-fields"></a>

## Used in fields

- [`IndexForSearch.search_engine`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.IndexForSearch/index.md#f-search_engine): Identifies the search engine.
- [`IndexOptions.search_engine`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.IndexOptions/index.md#f-search_engine): Identifies the search engine.
- [`VaultData.search_engine`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.VaultData/index.md#f-search_engine): Specifies the search engine of the vault.