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2024.3
  • Immuta Documentation - 2024.3
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Copyright © 2014-2024 Immuta Inc. All rights reserved.

On this page
  • Supported external catalogs
  • Architecture
  • Alation
  • Collibra
  • How Immuta gets metadata from Collibra
  • Limitations
  • Microsoft Purview catalog
  • How Immuta gets metadata from Microsoft Purview
  • Limitations
  • Custom REST catalog
  • Databricks Unity Catalog tag ingestion
  • Snowflake tag ingestion
  • External catalog behaviors
  • Resources

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  1. Integrations
  2. Catalogs
  3. Reference Guides

External Catalogs

Last updated 1 month ago

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Users who want to use tags from outside of Immuta can connect an external catalog to automatically pull and apply them to Immuta data sources. These tags can then be used to drive or .

Supported external catalogs

Immuta supports the following external catalogs:

To configure an external catalog, see the .

Architecture

Once an external catalog has been configured on the Immuta app settings page, there are two recurring process steps:

  1. Linking to data sources and columns: Whenever a new data source is created or an external catalog is set up, Immuta will attempt to automatically link data sources to their corresponding assets in the external catalog. This is done by comparing the fully qualified name of a data source in Immuta with its corresponding asset name in the external catalog, so data sources must have the same name in Immuta and the external catalog. Alternatively, a user can also a data source to an asset in an external catalog. Once a data source has been linked to an external catalog, it can be seen on the data source's detail page.

  2. Pull and apply tags in Immuta: Using the link established in the first step, Immuta polls the external catalog to ingest and apply tags to each data source and its columns. Immuta checks every 24 hours for any relevant metadata changes in the connected external catalog. Tags originating from an external catalog can be found on the tags list page and on the data dictionary page for each data source.

See below for more information about the way Immuta integrates with each supported external catalog provider.

Alation

Immuta's Alation integration supports importing both tags and custom fields, Alation's two primary ways of allowing data stewards to apply metadata to data assets.

  • Tags: Tags are a single word or phrase that can be attached to most Alation objects by nearly anyone. For instance, users can add a PCI tag for financial data.

  • Custom fields: Custom fields are key-value pairs that can only be attached and removed by authorized users. Unlike tags, custom fields can have multiple values associated with a single key. For example, the custom field DK_STEWARD could have MARKETING, FINANCE, and CUSTOMER values associated with it. Using Alation custom fields allows you to explicitly control who can modify information associated with that field inside of Alation, whereas Alation standard tags are modifiable by any user inside of Alation.

When pulled into Immuta, Alation tags and custom fields will be applied to data sources as either column or data source tags in Immuta. Importing both Alation tags and custom fields into Immuta provides full flexibility for organizations leveraging the Alation enterprise data catalog, no matter what operating model they choose to document their metadata in Alation.

Collibra

Immuta's Collibra integration supports importing both tags and attributes. Additionally, data source and column descriptions from the connected Collibra catalog will be pulled into Immuta.

  • Tags: Tags are a single word or phrase that can be attached to objects in Collibra. For instance, users can add a PHI tag on health-related data assets.

  • Attributes: Attributes in Collibra are a characteristic that describes an asset with an individual field. Unlike tags, attributes can have multiple values associated with a single key. For example, the attribute classification could have non sensitive, sensitive, and highly sensitive values associated with it. Using Collibra attributes allows you to explicitly control who can modify information associated with that field inside of Collibra, whereas Collibra standard tags are modifiable by any user inside of Collibra.

When pulled into Immuta, Collibra tags and attributes will be applied to data sources as either column or data source tags in Immuta. Importing both Collibra tags and attributes into Immuta provides full flexibility for organizations leveraging the Collibra data catalog, no matter what operating model they choose to document their metadata in Collibra.

How Immuta gets metadata from Collibra

  • Linking to data sources and columns in Collibra: Immuta links data sources to assets in Collibra by looking up the full name.

Limitations

  • Collibra assets must have unique full names in order for Immuta to guarantee exact matching. If there are multiple Collibra assets with the same name, Immuta will link to the first asset it matches to.

  • Columns must have a direct relation to their parent asset in Collibra. Indirect/inherited relations are not supported and will result in column tags and attributes not being ingested into Immuta.

Microsoft Purview catalog

Private preview: This feature is available to select accounts. Contact your Immuta representative to enable this feature.

How Immuta gets metadata from Microsoft Purview

  • Linking to data sources and columns in Microsoft Purview: Immuta links data sources to assets in Microsoft Purview by looking up the fully qualified name of an entity. The composition of the fully qualified name in Microsoft Purview differs depending on the technology type backing the data source.

  • Pull and apply tags in Immuta from Microsoft Purview: Immuta polls Microsoft Purview every 24 hours for all tags.

Limitations

  • Standard tags from Purview do not get ingested into Immuta

  • The current implementation only supports Databricks Unity Catalog, Snowflake and Azure Synapse Analytics data sources and their associated columns

  • Managed attributes are supported, but have the following limitations:

    • If a managed attribute is applied to an Immuta data source but later expires, it will still appear as a tag on the data source. Expired attributes must be removed from the object in Purview for the tag to be removed from the Immuta data source.

    • The following managed attribute data types are not supported and will not be applied to Immuta data sources as tags:

      • Dates

      • Number types

      • Rich text

Custom REST catalog

If users have an unsupported catalog, or have customized their catalog integration, they can connect through the REST Catalog using the Immuta API.

Databricks Unity Catalog tag ingestion

Design partner preview: This feature is only available to select accounts. Reach out to your Immuta representative to enable this feature.

Snowflake tag ingestion

External catalog behaviors

  • Tags ingested from external catalogs cannot be edited within Immuta. To edit, delete, or add a tag from an external catalog to a data source or column, make the change in the external catalog.

  • Immuta searches all external catalog providers once per day and links data sources without an external catalog attached to them to the first catalog that matches.

  • S3 data sources cannot be linked to external catalogs.

Resources

Collibra tags using the dot "." delimiter will be transformed into hierarchical tags in Immuta. To learn more about the benefits of hierarchical tags for policy authoring, see .

Pull and apply tags in Immuta from Collibra: Immuta checks Collibra every 24 hours by observing the linked for any relevant metadata changes. Based on these changes, Immuta then only polls and ingests tags from Collibra for the relevant data sources. However, if Immuta observes more than 25,000 metadata changes in Collibra within 24 hours, it will poll all data sources for tags during that run of external catalog tag synchronization.

The Microsoft Purview catalog integration with Immuta currently supports ingestion of and as tags. Additionally, data source and column descriptions from the connected Microsoft Purview catalog will be pulled into Immuta.

For more details about using a custom REST catalog with Immuta, see the .

Users can connect their Databricks Unity Catalog account to allow Immuta to ingest Databricks tags and apply them to Databricks data sources. To learn more about Databricks Unity Catalog tag ingestion, see the .

Users can connect a Snowflake account to allow Immuta to ingest Snowflake tags onto Snowflake data sources. To learn more about Snowflake tag ingestion, see the .

You can configure multiple external catalogs within a single tenant of Immuta, but only one external catalog can be .

To configure an external catalog, see the .

To learn more about how Immuta can automatically tag your data with Discover, see the .

assets history
Classifications
Managed attributes
Custom REST Catalog Interface Introduction
Configuration how-to guide
Discover introduction
policies
classification frameworks
Configure an external catalog guide
Alation
Collibra
Microsoft Purview
Custom REST catalog
Databricks Unity Catalog tag ingestion
Snowflake tag ingestion
tag hierarchy
Snowflake reference guide
Databricks Unity Catalog reference guide
linked to a data source
manually link