In Emacs org-mode I know that I can call up the agenda "match" view (using C-a m) and then use the following search string to find all TODO items that have their deadline set to today:

DEADLINE="<today>"

However, I want to find all items in my TODO list that don't have any deadline set at all. I've searched but can't seem to find an answer; the following doesn't seem to work either:

DEADLINE=""

How do I search for all TODOs that don't have a DEADLINE specified?

(The same also applies to finding items that haven't been scheduled, but I'm guessing the solution will be the same.)

search emacs org-mode
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