[Evolution] Expression documentation

[Matthew A. R. Sherian]

I am attempting to right a filter that will run a glade app that will pop-up a window the rule is enclosed, but match-folder isn't a valid _expression_. What are the available expressions?

(match-all (header-source  "exchange://<snip>/"))
   
 
     (match-all (not (system-flag  "Seen")))
   
  (match-all (match-folder BigBrother)))
  )