anchor.diff:  
   Upgrade:: The change of a subscription from one plan to another plan of higher dollar value.
   
  -{A change order or amendment to an existing contract subscription in which a customer chooses a higher service level, such as a more expensive service offering, or a larger quantity of users.}
  +//{A change order or amendment to an existing contract subscription in which a customer chooses a higher service level, such as a more expensive service offering, or a larger quantity of users.}
   
  -Usage Pricing
  -
  -{Pricing a service or item based on its consumption or usage rather than a flat rate for a given service or period of time.}
  +//Usage Pricing
  +//{Pricing a service or item based on its consumption or usage rather than a flat rate for a given service or period of time.}
   
   User:: A person who logs on to Kaui.
   
  
positive.code: Price List:: One or more plans that have discount/special pricing. Price lists are defined in the <<Catalog,catalog>>.
  Along with price lists, you define <<Rules,catalog rules>> that specify which price list to use if a customer changes plans.
  
  Pricing Tiers
  Also known as "tiered pricing" or "price tiers."
  {A common subscription and usage charge model where pricing changes are based on the incremental number of units that are purchased. For example, 1-5 users are charged full price and 5-10 users receive discounted pricing. A customer purchases 7 units. Units 6 and 7 are discounted, and the first 5 units are charged at the full price.}
  
  [[Product]]Product:: A product or service that the customer can purchase (or rent/lease). A product can be associated with multiple <<Plans,plans>>, each plan specifying different ways the product can be purchased (e.g., a monthly plan and an annual plan).
  
  Proration
  {Adjusting a customer's bill amount to reflect any plan changes made in the middle of a billing cycle.}
  
  == Q
  
  == R
  
  Refund
  
  {A refund returns money to a customer - as opposed to a credit, which creates a customer credit balance that may be applied to reduce the amount owed to you. For instance, refunds are used when a customer cancels service and is no longer your customer. Refunds can also represent processed payments that are reversed, such as a chargeback or a direct debit payment reversal.}
  
  [[Rules]]Rules:: The rules that determine how Kill Bill should behave when a plan is created, cancelled or changed. Also known as "catalog rules."
  
  
negative.code: 
  Payment Method:: A record of payment details, such as for credit cards, debit cards, PayPal accounts, etc. Each account can have many payment methods and one default payment method. Note that much of the representation of a payment method is plugin-specific and is actually stored by the payment plugin itself.
  
  //PCI Compliance
  //{ PC​I DSS (payment card industry data security standard)}
  //{The payment card industry data security standard (PCI DSS) is a set of requirements designed to ensure that all companies that process, store, or transmit credit card information maintain a secure environment. Zuora has compliance in accordance with PCI Service Provider Level1 (PCI DSS SP L1) v1.2. Zuora is listed on the VISA website as an approved provider.}
  
  [[Phase]]Phase:: The time periods within a plan. Kill Bill phases can be any of the following types: `TRIAL`, `DISCOUNT`, `FIXEDTERM`, or `EVERGREEN`. Note that a plan has at least one phase (i.e., a plan cannot be "empty" of phases.) A phase is also referred to as a "plan phase." See <<Plan>> below.
  
  