# Can not be empty

This is the most basic rule in Blocworx. It simply demands that the field is not empty. 

![](https://1186088597-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MSr2uF2m-DtSpCxknCK%2F-Ma4Gedg_sL3kMe_Z2U6%2F-Ma4HEumgEO79ebE2jsu%2Fimage.png?alt=media\&token=57c76d4a-bbe0-408b-95b8-b28229038d0c)

### Rule Parameters

This rule does not have any rule parameters.