# ChatPromptValueConcrete

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/prompt_values/ChatPromptValueConcrete)

Chat prompt value which explicitly lists out the message types it accepts.

For use in external schemas.

## Signature

```python
ChatPromptValueConcrete(
    self,
    *args: Any = (),
    **kwargs: Any = {},
)
```

## Extends

- `ChatPromptValue`

## Properties

- `messages`
- `type`

---

[View source on GitHub](https://github.com/langchain-ai/langchain/blob/6fb37dba71da807af60aa7b909f71f0625a666bf/libs/core/langchain_core/prompt_values.py#L152)