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

# Knowledge overview

> The documents and structured data your agents answer from.

**Knowledge** is what your Agents read. Documents you upload, sources ingested through Foundry pipelines, and structured facts stored as memory or graphs.

Knowledge is separate from **memory** — knowledge is authored (you curate it); memory is learned (agents accumulate it from experience). Both feed into retrieval.

## Where knowledge lives

* **Document collections** — the primary store. Chunks are indexed for retrieval.
* **Memory spaces** — see [Memory](/build/memory/overview).
* **Causal graphs** — structured entity-relationship data. See [Causal Graph](/build/causal-graph/overview).

## How to get knowledge in

<CardGroup cols={2}>
  <Card title="Upload documents" icon="upload" href="/build/knowledge/upload">
    Drag files in, or paste URLs. Handles PDF, DOCX, MD, HTML, CSV.
  </Card>

  <Card title="Foundry pipelines" icon="pipe" href="/build/foundry/overview">
    Automated ingest from cloud drives, databases, and APIs.
  </Card>
</CardGroup>

## How to organize it

<CardGroup cols={2}>
  <Card title="Tag & organize" icon="tag" href="/build/knowledge/tag">
    Group by department, audience, feature, or freshness.
  </Card>

  <Card title="Versioning & supersede" icon="clock-rotate-left" href="/build/knowledge/supersede">
    Retire outdated info without deleting the audit trail.
  </Card>
</CardGroup>

## How to use it

<Card title="Attach to agents" icon="link" href="/build/knowledge/attach">
  Give an Agent access to specific collections, tagged subsets, or memory spaces.
</Card>

## Deletion vs. supersede

You can hard-delete a document, but this is rarely what you want. Better: **supersede** it. Superseded documents:

* Are excluded from all retrieval.
* Stay queryable for audit.
* Can be reversed if you superseded by mistake.

Reserve hard delete for legal/compliance takedowns and PII removals. See [Supersede](/build/knowledge/supersede).

## Storage & limits

* Free workspaces: 500 MB of source documents, 10k chunks.
* Team plan: 10 GB, 500k chunks.
* Enterprise: unlimited (fair use), scales to hundreds of millions of chunks.

The storage counter in Workspace Settings shows current usage broken down by collection.