Device Tab Filter Negation

Hi.
Is there a way to filter device list to see all devices that do NOT have certain tag?

Tags.Provisioned IS NULL

Unfortunately it is not working.

Found it:
NOT Q("Tag", "UpToDate")

If you put the this line into the UI filters dialog, it does work:
Tags.UpToDate Is Null

Maybe you should indicate where/what you are trying to filter? NBI? UI?