> For the complete documentation index, see [llms.txt](https://db.coolstone.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://db.coolstone.dev/4/advanced.md).

# ADVANCED

- [Metadata](https://db.coolstone.dev/4/advanced/metadata.md)
- [Middleware](https://db.coolstone.dev/4/advanced/middleware.md): Dubnium has built-in Express middleware functions to manage Records. Data is never sent to the client without your permission.
- [Versioning](https://db.coolstone.dev/4/advanced/versioning.md)
- [Synchronization](https://db.coolstone.dev/4/advanced/synchronization.md)
- [Indexing](https://db.coolstone.dev/4/advanced/indexing.md)
- [Miscellaneous](https://db.coolstone.dev/4/advanced/miscellaneous.md): Other functions provided by Dubnium.
- [Events](https://db.coolstone.dev/4/advanced/events.md): Dubnium uses the built-in Events module to send messages when something happens!
- [CLI](https://db.coolstone.dev/4/advanced/cli.md): Run Dubnium functions from your command-line!