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

# System Data Types

fylr uses a few system data types to drive the system. These include types like `user`, `group`, `pool` and others.