Bukkit

The filter expression is super useful, when you're looking for something in specific.
But sometimes you got a suspicion something is out of the ordinary and you'd like to search for everything that has happened except for the stuff that's allowed.

An example:
There was a buildcontest, and players were instructed to use only a set of materials. You want to check if that rule has been broken.
Currently there's no easy way to do this as negating filter options doesn't work.

/he search p:jack a:block-place  e:42
this command would find all blocks placed by jack except for iron blocksa

/he search p:jack a:block-place  e:41,42,101
this command would find all blocks placed by jack except for iron blocks, gold blocks etc.