> For the complete documentation index, see [llms.txt](https://docs.katara.ai/about/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.katara.ai/about/governance-concepts/what-is-a-corpus.md).

# Knowledge sources

Knowledge sources are the approved documents, collections, and systems that Katara can use to ground AI answers.

In the new platform structure, this concept belongs to the [AI Knowledge Base](/about/platform/ai-knowledge-base.md). The goal is not to make every file available to AI. The goal is to keep retrieval tied to sources the organization has approved and can govern.

## Why this matters

Regulated AI workflows need source control. Teams should be able to understand which sources were available, which user or application was in scope, and why a response could use a particular piece of context.

## Related concepts

* [Collections](/about/governance-concepts/collections.md)
* [Document ownership](/about/governance-concepts/document-ownership.md)
* [Sharing](/about/governance-concepts/sharing.md)
* [Access and visibility](/about/governance-concepts/visibility.md)