> ## Documentation Index
> Fetch the complete documentation index at: https://langchain.idochub.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Graph RAG

## Overview

[Graph RAG](https://datastax.github.io/graph-rag/) provides a retriever interface
that combines **unstructured** similarity search on vectors with **structured**
traversal of metadata properties. This enables graph-based retrieval over **existing**
vector stores.

## Installation and setup

<CodeGroup>
  ```bash pip theme={null}
  pip install langchain-graph-retriever
  ```

  ```bash uv theme={null}
  uv add langchain-graph-retriever
  ```
</CodeGroup>

## Retrievers

```python theme={null}
from langchain_graph_retriever import GraphRetriever
```

For more information, see the [Graph RAG Integration Guide](/oss/python/integrations/retrievers/graph_rag).