[Orgmode] How to match tags when no tag present

[Jeff Horn]

Hey orgsters,

I'm trying to have agenda show me a list of untagged tasks. Someone in
#orgmode suggested using the regexp brackets {}, but the following tag
matches produces nothing:

1) {}
2) +{}
3) -{}

How would I match all TODOs that are untagged?

Thanks for any pointers.

Jeff

-- 
Jeffrey Horn
Graduate Lecturer and PhD Student in Economics
George Mason University

(704) 271-4797
address@hidden
address@hidden

http://www.failuretorefrain.com/jeff/