Boolean filtering

[wakatara]

About the only reason I haven't switched away from HogBay's Taskpaper to this right now is the one killer feature it has that this doesn't: boolean filters.

So, quote often I'll use the right search window to filter @week22 and not @done and get a list of everything I need to sort this week. Or the one that I'm looking at right now <project = "ISF" and @week22 and not @done*>

Is there any possible way to implement that? Been trying to think if that's possible on the : line with a :filter or something.

Thoughts? If anyone has seen a way to do this in other vim plugins, I'd be willing to take a shot at it, though have to admit to having little experience with vim plugins.