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

# Knowledge Bases FAQ

> Questions about supported formats, indexing, sync, and data handling.

# Knowledge Bases FAQ

<AccordionGroup>
  <Accordion title="What file formats are supported?">
    Neural Factory supports:

    * **PDF** (`.pdf`) — Text-based and scanned (with OCR)
    * **Word** (`.docx`, `.doc`)
    * **Excel** (`.xlsx`, `.xls`)
    * **PowerPoint** (`.pptx`)
    * **Text** (`.txt`)
    * **CSV** (`.csv`)
  </Accordion>

  <Accordion title="How long does indexing take?">
    Indexing time depends on file size, type, and queue depth:

    * Small text files: seconds
    * Standard PDFs (1–10 MB): 10–60 seconds
    * Large documents (10–50 MB): 1–5 minutes
    * Bulk uploads (100+ files): 10–30 minutes

    Monitor progress on the knowledge base detail page.
  </Accordion>

  <Accordion title="How often does SharePoint/Google Drive sync?">
    Sync frequency depends on the datasource configuration:

    * **Manual** — Only when you click "Sync Now"
    * **Automatic** — Periodically checks for changes (frequency depends on configuration)

    You can trigger a manual sync at any time from the datasource settings.
  </Accordion>

  <Accordion title="Can I upload password-protected PDFs?">
    No. Password-protected or encrypted PDFs cannot be processed. Remove the password protection before uploading.
  </Accordion>

  <Accordion title="What happens when I delete a document?">
    When you delete a document:

    1. The file is removed from storage
    2. All indexed chunks are removed from the vector store
    3. The agent can no longer find or cite content from that document

    Deletion is permanent and cannot be undone.
  </Accordion>

  <Accordion title="Is there a file size limit?">
    File size limits depend on your deployment:

    * **Enterprise**: Configured per deployment
    * **SaaS**: Varies by subscription plan

    If you encounter a file size error, try splitting large documents into smaller files.
  </Accordion>

  <Accordion title="Can multiple agents share the same knowledge base?">
    Yes. A knowledge base can be connected to multiple agents. This is common when different agents need access to the same underlying documents but with different system prompts or tools.
  </Accordion>

  <Accordion title="How does the search work?">
    Neural Factory uses **hybrid retrieval**:

    1. **Semantic search** finds content that is conceptually similar to the query
    2. **Keyword search** finds content containing the exact terms
    3. **Reranking** re-scores results using a dedicated reranker model for optimal relevance

    This combination delivers better results than either approach alone.
  </Accordion>
</AccordionGroup>