anchor.diff:  | 
   * spectral class{1}
   * planetary characteristics{1}
  +* colony{0..1}
   * fleet{*}
   
   | spectral class 
  
positive.code: | -
  
  | planetary characteristics
  | Summarizes the overall characteristics of a star system's planets. That means individual planets are not taken into account but rather a average value. The characteristics include e.g.: planetary environment, planetary specials and planetary size.
  | -
  |
  * planetary environment{1}
  * planetary specials{*}
  
  | planetary environment 
  | 
  * Terran
  * Jungle
  * Ocean
  * Arid
  * Steppe
  * Desert
  * Minimal
  * Barren
  * Tundra
  * Dead 
  * Inferno
  * Toxic
  * Radiated
  | -
  | -
  
  | planetary special
  | 
  * Mineral Poor
  * Ultra Poor
  * Artifact
  * Mineral Rich
  * Ultra Rich
  * Hostile
  * Fertile
  * Gaia
  | -
  | -
  
  
negative.code: * star{0..1}
  
  | ship
  | A single space vessel. The type is either:
  
  * scout (speed = 0.5, scan radius = 0.5)
  * fighter (speed = 0.4, scan radius = 0.25)
  * colony ship (speed = 0.25, scan radius = 0.5)
  | -
  |
  * type
  * scan radius{1}
  * speed [parsecs/turn]
  
  |=== 
  