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

# Digital River API Reference Guide

- [API structure](https://docs.digitalriver.com/digital-river-api-reference/digital-river-api-reference-guide/api-structure.md): Understand the Digital River API structure.
- [Best practices](https://docs.digitalriver.com/digital-river-api-reference/digital-river-api-reference-guide/best-practices.md): Understand the best practices when integrating with the Digital River API.
- [Supported languages](https://docs.digitalriver.com/digital-river-api-reference/digital-river-api-reference-guide/supported-languages.md): Access a list of Digital River's supported languages and learn more about how to use them.
- [Working with metadata](https://docs.digitalriver.com/digital-river-api-reference/digital-river-api-reference-guide/working-with-metadata.md): Gain a better understanding of metadata, including its restrictions, how to manage it, and how it flows from one API object to another
- [Rate limiting](https://docs.digitalriver.com/digital-river-api-reference/digital-river-api-reference-guide/rate-limiting.md): Understand the rate limits in the Digital River APIs as well as how to handle and avoid reaching them
- [Versioning](https://docs.digitalriver.com/digital-river-api-reference/digital-river-api-reference-guide/versioning.md): Learn about API versioning and updating, as well as non-breaking and breaking changes.
- [Glossary](https://docs.digitalriver.com/digital-river-api-reference/digital-river-api-reference-guide/glossary.md): Understand common terms used throughout the documentation