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

# Retrieval Strategy • Rust AI Agent SDK

> RetrievalStrategy: Retrieval strategy for RAG.

# RetrievalStrategy

> Defined in the [**RAG**](../modules/rag) module.

<Badge color="orange">Rust AI Agent SDK</Badge>

Retrieval strategy for RAG.

## Fields

| Name           | Type      | Description                        |
| -------------- | --------- | ---------------------------------- |
| `Simple`       | `variant` | -                                  |
| `similarity`   | `variant` | -                                  |
| `search`       | `variant` | -                                  |
| `default`      | `variant` | Simple similarity search           |
| `Similarity`   | `variant` | Simple similarity search           |
| `Hybrid`       | `variant` | -                                  |
| `search`       | `variant` | -                                  |
| `Hybrid`       | `variant` | Hybrid search (keyword + semantic) |
| `Multi`        | `variant` | -                                  |
| `query`        | `variant` | -                                  |
| `expansion`    | `variant` | -                                  |
| `MultiQuery`   | `variant` | Multi-query expansion              |
| `Hierarchical` | `variant` | -                                  |
| `retrieval`    | `variant` | -                                  |
| `Hierarchical` | `variant` | Hierarchical retrieval             |
| `Contextual`   | `variant` | -                                  |
| `compression`  | `variant` | -                                  |
| `Compression`  | `variant` | Contextual compression             |

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-rust/praisonai/src/rag/mod.rs">
  `praisonai/src/rag/mod.rs` at line 0
</Card>

***

## Related Documentation

<CardGroup cols={2}>
  <Card title="Rust Retrieval" icon="search" href="/docs/rust/retrieval" />

  <Card title="Rust Query" icon="magnifying-glass" href="/docs/rust/query" />

  <Card title="Rust Evaluation" icon="gavel" href="/docs/rust/evaluation" />

  <Card title="Rust Criteria" icon="check-double" href="/docs/rust/criteria" />
</CardGroup>