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

# Data Catalogs

Data catalogs and Honeydew exchange context in two directions. Honeydew publishes its semantic
definitions and business [metadata](/docs/governance/metadata) into a catalog, so governance and
business users find trusted metrics next to the rest of the catalog. In the other direction,
the AI can read governed knowledge from a catalog as
[External Knowledge](/docs/integration/context-layer/context-management#external-knowledge), so that
knowledge stays owned in the catalog instead of being restated in Honeydew.

<Info>
  The Atlan, Collibra, and DataHub integrations are in Beta. To enable one for your organization,
  please contact [support@honeydew.ai](mailto:support@honeydew.ai).
</Info>

## Supported Tools

| Tool | Publish Honeydew definitions | Context source for the AI |
| - | - | - |
| [Atlan](/docs/integration/catalogs/atlan) | Supported | Supported |
| [Collibra](/docs/integration/catalogs/collibra) | Supported | Not Supported |
| [DataHub](/docs/integration/catalogs/datahub) | Not Supported | Supported |
| [Tableau Catalog](/docs/integration/bi-tools/tableau#tableau-catalog) | Descriptions | N/A |

## How Integration Works

* **Publishing to a catalog**: Atlan and Collibra connect under **Settings** → **Semantic
  integrations**. Each workspace branch is published as one model, with its entities,
  attributes, metrics, and business metadata, and lineage to warehouse columns where configured.
  See each tool's page for setup and the asset types it creates.
* **Tableau Catalog**: field descriptions sync through a [Tableau](/docs/integration/bi-tools/tableau)
  connection, as part of each data source publish.
* **Reading from a catalog**: Atlan and DataHub connect over MCP as External Knowledge sources.
  The AI fetches their definitions or context pages at query time.

## Security

Publishing to a catalog sends metadata only. External Knowledge connections fetch catalog
content — Atlan definitions and glossary terms, DataHub context pages — for the AI at query
time. Neither reads data stored in your cloud data warehouse.

See [security](/docs/security/security) for more details.


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