# Reference Guides

- [Data Policies Reference Guide](https://documentation.immuta.com/SaaS/govern/secure-your-data/authoring-policies-in-secure/data-policies/reference-guides/data-policies.md): Learn how protect policies and reveal policies enforce access controls
- [Masking Policies](https://documentation.immuta.com/SaaS/govern/secure-your-data/authoring-policies-in-secure/data-policies/reference-guides/masking-matrix-functions.md): Learn about the types of masking policies Immuta supports
- [Orchestrated Masking Policies](https://documentation.immuta.com/SaaS/govern/secure-your-data/authoring-policies-in-secure/data-policies/reference-guides/masking-matrix-functions/orchestrated-masking-policies.md)
- [Row-Level Policies](https://documentation.immuta.com/SaaS/govern/secure-your-data/authoring-policies-in-secure/data-policies/reference-guides/row-redaction-explained.md): Learn how row-level policies limit what data users are allowed to see once they are granted access to a data source
- [Limit to Purpose Policies](https://documentation.immuta.com/SaaS/govern/secure-your-data/authoring-policies-in-secure/data-policies/reference-guides/limit-to-purpose-policies.md): Learn how purpose policies limit users' access to data
- [Custom WHERE Clause Functions](https://documentation.immuta.com/SaaS/govern/secure-your-data/authoring-policies-in-secure/data-policies/reference-guides/custom-where-clause-functions.md): Learn about the custom WHERE clause functions Immuta supports
- [Lookup Tables](https://documentation.immuta.com/SaaS/govern/secure-your-data/authoring-policies-in-secure/data-policies/reference-guides/lookup-tables.md): Learn how lookup tables can be used to reference user metadata


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://documentation.immuta.com/SaaS/govern/secure-your-data/authoring-policies-in-secure/data-policies/reference-guides.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.