anchor.diff:  
   === Plans
   
  -image::catalog_plan.png[]
  +image:https://drive.google.com/uc?&id=0Bw8rymjWckBHcl9mb2ZDMG12LXc&w=960&amp;h=480[align=center]
  +// https://drive.google.com/file/d/0Bw8rymjWckBHcl9mb2ZDMG12LXc/view?usp=sharing
   
   Each Plan has a name and refers to the purchase of a single product. Beyond that the Plans parameters are arranged by phase. In the illustration above we are showing a Plan with a 30 day Trial followed by an unlimited recurring phase. We often use the term “Evergreen” to refer to phase like this. For each phase of the plan we need to specify:
   
  
positive.code: 
  === Price list
  
  image::catalog_pricelist.png[]
  
  Price Lists are collections of Plans that are grouped for selection or interchange they are used for identifying discount pricing for presentation to a particular customer group. In the example illustrated above we are supposing that MI6 is providing rental Spy Cars at special pricing levels for C.I.A. agents and former K.G.B. agents.
  
  
negative.code: 
  ==== Products
  
  image:https://drive.google.com/uc?&id=0Bw8rymjWckBHT3dKd0U3a1RfcUE&w=960&amp;h=480[align=center]
  // https://drive.google.com/file/d/0Bw8rymjWckBHT3dKd0U3a1RfcUE/view?usp=sharing
  
  The Product is a representation of the thing the customer is actually buying. Specifying a Product is very straightforward it has the following parameters:
  
  