# SearchType

> **Class** in `langchain_classic`

📖 [View in docs](https://reference.langchain.com/python/langchain-classic/retrievers/multi_vector/SearchType)

Enumerator of the types of search to perform.

## Signature

```python
SearchType()
```

## Extends

- `str`
- `Enum`

## Properties

- `similarity`
- `similarity_score_threshold`
- `mmr`

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/79cab2dc7f58be720cac43db3677b4c1fd971f91/libs/langchain/langchain_classic/retrievers/multi_vector.py#L18)