# 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`

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/f40f58d50499700f98051be6bb610bee5dd11cc2/libs/core/langchain_core/prompt_values.py#L152)