> For the complete documentation index, see [llms.txt](https://docs.profile.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.profile.io/system-overview/profile.io-architecture/data-registries.md).

# Data Registries

- [Schema Registry](https://docs.profile.io/system-overview/profile.io-architecture/data-registries/schema-registry.md)
- [Trusted Registry](https://docs.profile.io/system-overview/profile.io-architecture/data-registries/trusted-registry.md)
- [DID Registry](https://docs.profile.io/system-overview/profile.io-architecture/data-registries/did-registry.md)