// From:
// Differential Data Protection 
// for Dynamic Distributed Applications
// by Widener, Schwan and Bustamente

policy X1
  cut area lower left in stream camera10 viewed by John

policy X11
  blurr area lower right in stream camera10 viewed by John

policy X2
  blurr area upper right in stream camera3 viewed by Eric
  
policy X3
  stream access John camera4 if time range "9am" "5pm"

policy Airline1
  stream access Caterer PassengerRecords 
  if filter FoodPreferences installed

policy X4
  filter access John F1 camera1

policy X5
  stream access Jim camera4 if filter F3 installed

streams camera10 camera3 camera4 camera1

filters F1 F3