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

# KnowledgeDocument

> A single unit of indexed, retrievable, citable knowledge (the content), as opposed to a
KnowledgeSource which is the configuration of where that content is ingested from. Reusable
anywhere a knowledge document is returned, e.g. citations today and knowledge document listings
in future.