> For the complete documentation index, see [llms.txt](https://swatplus.gitbook.io/io-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swatplus.gitbook.io/io-docs/introduction-1/routing-units/untitled-2/obj_typ.md).

# obj\_typ

The following object types can be elements in a Routing Unit:

* another rtu
* hru
* res
* aqu
* sdc
* rec