[Evolution] Expression documentation

["Matthew A. R. Sherian" <mars mars-tmc hq themunicenter com>]

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)))
  )