> For the complete documentation index, see [llms.txt](https://documentation.immuta.com/2024.3/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.immuta.com/2024.3/integrations/catalogs.md).

# Catalogs

Connect an external catalog to use tagging capabilities outside of Immuta and pull tags from external table schemas. Once the catalog has been connected, Immuta ingests a data dictionary from the catalog and applies data source and column tags directly to the data source. These tags can then be used to create policies.

## [Getting started](/2024.3/integrations/catalogs/catalogs.md)

This getting started guide outlines how to use external catalogs in Immuta.

## How-to guide

[Configure an external catalog](/2024.3/integrations/catalogs/configure.md): Configure Alation, Collibra, or a custom REST catalog to ingest tags into Immuta.

## Reference guides

* [External catalog integrations](/2024.3/integrations/catalogs/reference-guides/pre-configuration.md): This reference guide describes the requirements of the external catalogs Immuta supports.
* [Custom REST catalog introduction](/2024.3/integrations/catalogs/reference-guides/custom-rest-catalogs.md): This reference guide describes the custom catalog option for users to make API calls to retrieve metadata on their data.
* [Custom REST catalog interface endpoints](/2024.3/integrations/catalogs/reference-guides/custom-rest-catalogs/interface.md): This reference guide describes the endpoints for configuring a custom REST catalog.


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