# Page Not Found

The URL `whats-an-object` does not exist.

You might be looking for one of these pages:
- [What's an Object ?](https://book.pragmatic-objects.com/design/whats-an-object.md)
- [Pragmatic Objects](https://book.pragmatic-objects.com/pragmatic-objects.md)
- [Value Object](https://book.pragmatic-objects.com/patterns/value-object.md)
- [Thinking Object](https://book.pragmatic-objects.com/design/thinking-object.md)
- [Compute Object](https://book.pragmatic-objects.com/patterns/compute-object.md)

## How to find the correct page

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

## Tips for requesting documentation

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