# Page Not Found

The URL `upgrading.html` does not exist.

You might be looking for one of these pages:
- [Upgrading](https://doc.orbeon.com/installation/upgrading.md)
- [Getting started](https://doc.orbeon.com/readme.md)
- [Purging historical data](https://doc.orbeon.com/form-runner/features/purging-historical-data.md)
- [Architecture and integration](https://doc.orbeon.com/form-runner/architecture-and-integration.md)
- [Building Orbeon Forms](https://doc.orbeon.com/contributors/building-orbeon-forms.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://doc.orbeon.com/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://doc.orbeon.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/installation/upgrading.md`)
- Use `Accept: text/markdown` header for content negotiation