> For the complete documentation index, see [llms.txt](https://docs.xrpns.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xrpns.com/fundamentals.md).

# Fundamentals

- [Buying](https://docs.xrpns.com/fundamentals/buying.md): Instructions on buying a domain
- [Updating records](https://docs.xrpns.com/fundamentals/updating-records.md): Here's a step-by-step guide to update text records for your .xrp domain!
- [Using affiliate links](https://docs.xrpns.com/fundamentals/using-affiliate-links.md): To express our gratitude and provide an opportunity for our members to earn rewards, we have designed an affiliate program that allows you to generate $XRP by sharing the benefits of XNS with others.
- [Setting up primary address](https://docs.xrpns.com/fundamentals/setting-up-primary-address.md)
- [Extending duration](https://docs.xrpns.com/fundamentals/extending-duration.md)
- [How to transfer](https://docs.xrpns.com/fundamentals/how-to-transfer.md)