# Page Not Found

The URL `front-end-tracking/data-handling` does not exist.

You might be looking for one of these pages:
- [Data Handling](https://crownpeak.gitbook.io/product-discovery/tracking-and-sending-events/data-handling.md)
- [Sending queries to the Recommendations API](https://crownpeak.gitbook.io/product-discovery/building-the-front-end-experience-with-xo/using-the-recommendations-api.md)
- [Constructing Queries](https://crownpeak.gitbook.io/product-discovery/building-the-front-end-experience-with-fhr/fredhopper-query-language.md)
- [Sending Queries to the Query API](https://crownpeak.gitbook.io/product-discovery/building-the-front-end-experience-with-fhr/sending-queries.md)
- [What is the FHR Query API](https://crownpeak.gitbook.io/product-discovery/building-the-front-end-experience-with-fhr/what-is-the-query-api.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://crownpeak.gitbook.io/product-discovery/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://crownpeak.gitbook.io/product-discovery/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/product-discovery/tracking-and-sending-events/data-handling.md`)
- Use `Accept: text/markdown` header for content negotiation