# ChainInput

> **Class** in `langchain_community`

📖 [View in docs](https://reference.langchain.com/python/langchain-community/chains/pebblo_retrieval/models/ChainInput)

Input for PebbloRetrievalQA chain.

## Signature

```python
ChainInput()
```

## Extends

- `BaseModel`

## Properties

- `query`
- `auth_context`
- `semantic_context`

## Methods

- [`dict()`](https://reference.langchain.com/python/langchain-community/chains/pebblo_retrieval/models/ChainInput/dict)

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[View source on GitHub](https://github.com/langchain-ai/langchain-community/blob/a6a6079511ac8a5c1293337f88096b8641562e77/libs/community/langchain_community/chains/pebblo_retrieval/models.py#L50)