# Page Not Found

The URL `xforms/xpath/extension-functions/core-functions` does not exist.

You might be looking for one of these pages:
- [Deprecated functions](https://doc.orbeon.com/xforms/xpath/extension-functions/deprecated-functions.md)
- [Extension functions](https://doc.orbeon.com/xforms/xpath/extension-functions.md)
- [Controls functions](https://doc.orbeon.com/xforms/xpath/extension-functions/extension-controls.md)
- [Core functions](https://doc.orbeon.com/xforms/xpath/extension-functions/extension-core.md)
- [JSON functions](https://doc.orbeon.com/xforms/xpath/extension-functions/extension-json.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., `/xforms/xpath/extension-functions/deprecated-functions.md`)
- Use `Accept: text/markdown` header for content negotiation