anchor.diff:  
   Billing Period:: The frequency in which Kill Bill invoices the account for one or more subscriptions. (_Examples:_ DAILY, WEEKLY, BIWEEKLY, MONTHLY, QUARTERLY, BIANNUAL, ANNUAL, BIENNIAL, and NO_BILLING_PERIOD)
   
  -[[Bundle]]Bundle:: A collection of subscriptions associated with a single service instance. For example, a customer might have a base subscription for her phone, plus an add-on subscription for international dialing. Because both subscriptions are associated with the same phone, they are collected into a single bundle. An account may have several bundles, each with one or more subscriptions. Also known as a "subscription bundle."
  +[[Bundle]]
  +Bundle:: A collection of subscriptions associated with a single service instance. For example, a customer might have a base subscription for her phone, plus an add-on subscription for international dialing. Because both subscriptions are associated with the same phone, they are collected into a single bundle. An account may have several bundles, each with one or more subscriptions. Also known as a "subscription bundle."
   
   Bill Cycle Day:: The day of the month the invoice is created for an account. Note that this is applicable only to monthly-based subscriptions (subscriptions that have a `MONTHLY`, `QUARTERLY`, `ANNUAL`, `BIMESTRIAL`, `BIANNUAL`, `BIENNIAL` billing period) as opposed to `DAILY`, `WEEKLY`, etc. subscriptions.
   
   == C
   
  -[[Catalog]]Catalog:: A description of the set of products, plans, phases, price lists, and rules that are available to customers. A catalog lets Kill Bill know what is being offered for sale and how much to charge for it.
  -
  -[[Child]]Child:: An account that is associated with a parent account. Setting up a parent-child associations lets you define which entity is responsible for paying the invoice. See also <<Parent>>.
  +[[Catalog]]
  +Catalog:: A description of the set of products, plans, phases, price lists, and rules that are available to customers. A catalog lets Kill Bill know what is being offered for sale and how much to charge for it.
  +
  +[[Child]]
  +Child:: An account that is associated with a parent account. Setting up a parent-child associations lets you define which entity is responsible for paying the invoice. See also <<Parent>>.
   
   //Credit
   
  
positive.code: //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).
  
  [[Product_Category]]Product Category:: A type of product. Possible values are <<base,BASE>>, <<addon, ADDON>>, and <<standalone,STANDALONE>>.
  
  //Proration
  //{Adjusting a customer's bill amount to reflect any plan changes made in the middle of a billing cycle.}
  
negative.code: 
  == I
  
  [[Invoice]]
  Invoice:: An invoice is a bill provided to a customer for charges that are payable on the customer's account. A single invoice consolidates charges for all subscriptions held by that customer for a specified time period. Invoices may be set to be paid automatically, or may be paid manually by the customer. An invoice consists of one or more <<Invoice_Item,invoice items>>.
  
  [[Invoice_Amount]]
  Invoice Amount:: The amount that a customer is charged as part of an invoice. Also known as "Invoice Total",  "Total",  "Charged Amount" or simply "Amount". At a high level, it is calculated by adding the amounts on all the chargeable <<Invoice_Item,invoice items>> associated with an invoice. See https://docs.killbill.io/latest/invoice_examples.html#_charged_amount[charged amount] for more information.
  
  [[Invoice_Balance]]
  Invoice Balance:: The amount that the customer owes as part of an invoice. It is positive if the customer owes something or zero otherwise. At a high level,  it is calculated by subtracting the paid amount from the <<Invoice_Amount, invoice amount>>. See https://docs.killbill.io/latest/invoice_examples.html#_invoice_balance[invoice balance] for more information.
  
  [[Invoice_Credit]]
  Invoice Credit:: The amount that your business owes to a customer as part of an invoice. An invoice credit is generated when an account credit is added, a subscription is cancelled, etc.
  
  [[Invoice_Item]]
  Invoice Item:: Represents a single item charged on an <<Invoice,invoice>>. Given an active <<Subscription,subscription>>, one could see multiple items for that subscription on a single invoice, including recurring items, usage items, fixed price items, etc. There can also be items for different subscriptions on the same invoice, as well as items that are unrelated to subscriptions, such as adjustments and taxes.
  
  [[Invoice_Item_Type]]
  Invoice Item Type:: Specifies the type of <<Invoice_Item,invoice item>> which can be one of `EXTERNAL_CHARGE`, `FIXED`, `RECURRING`, `REPAIR_ADJ`, `CBA_ADJ`, `ITEM_ADJ`, `USAGE`, `TAX`, `PARENT_SUMMARY`. Refer to the
  https://docs.killbill.io/latest/userguide_subscription.html#components-invoicing[_Subscription Billing_] document for more information.
  
  Invoice Original Amount Charged:: The amount that the customer is charged as part of an invoice at the time of invoice creation. At a high level, it is calculated by adding the amounts on all the chargeable <<Invoice_Item,invoice items>> associated with an invoice at the time of invoice creation.
  
  [[Invoice_Payment]]
  Invoice Payment:: <<Payment,Payment>> made against a specific invoice. By default, Kill Bill attempts to make a payment against an invoice using the account's default <<Payment_Method, payment method>>.
  
  [[Invoice_Refund]]
  Invoice Refund:: Refund amount associated with an <<Invoice_Payment,invoice payment>>. Kill Bill allows issuing a full or partial refund against an invoice payment.
  
  Invoice Status:: The current state of an invoice, which can be in a `DRAFT`, `COMMITTED` or `VOID` state.
  
  