anchor.diff:  Catalog:: A description of the 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.
   
   [[ctd]]
  -Charged Through Date(CTD) :: The date up to which the entitlement for a subscription has been invoiced. For `IN_ADVANCE` billing mode, this date will often be in the future; for `IN_ARREAR`, this date will often be in the past.
  +Charged Through Date(CTD) :: The date up to which the subscription has been invoiced for. Irrespective of whether the billing happens `IN_ADVANCE` or `IN_ARREAR`, each subscription has a date up to which it was invoiced for. This is the CTD. For `IN_ADVANCE` billing mode, the `CTD` is a date in the future while for `IN_ARREAR`, it is a date in the past. 
   
   [[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, Parent>>.
   
   [[credit_invoice]]
  -Credit Invoice:: An invoice corresponding to a credit. It is is generated when an administrator adds an account credit. It consists of two <<Invoice_Item, invoice items>>: a negative `CREDIT_ADJ` item and a positive `CBA_ADJ` item. <<Invoice_Item, invoice item>>. 
  +Credit Invoice:: An invoice corresponding to a credit. It is generated when an administrator adds an account credit. It consists of two <<invoice_item, invoice items>>: a negative `CREDIT_ADJ` item and a positive `CBA_ADJ` item.
   
   Customer:: The person who purchases a product or service from your organization. See also <<account, Account>>.
   
  -Custom Field:: An attribute (key-value pair) that may be attached to a resource like account, bundle or subscription and so on.
  +Custom Field:: An attribute (key-value pair) that may be attached to a resource like an account, bundle, subscription, and so on.
   
   == D
   
  
positive.code: Billing in Arrear:: A type of https://docs.killbill.io/latest/catalog-examples.html#_billing_modes[billing mode] in which you can charge for services that are delivered in a previous billing period.
  
  [[billing_start_date]]
  Billing Start Date (Or "Billing Date"):: The date on which billing starts for a subscription. See also <<entitlement_start_date, Entitlement Date>>.
  
  [[billing_mode]]
  Billing Mode:: The method in which you invoice for a recurring subscription. "Billing in advance" and "billing in arrear" are two types of billing modes.
  
negative.code: 
  |===
  
  External Payment Method:: A built-in payment method that can be used to track payments that occur outside of Kill Bill (example: check payments).
  
  Event:: A message exposed by Kill Bill core components when a certain occurrence takes place in the system. For example, when a subscription is created, Kill Bill generates an event corresponding to it.
  
  == F
  
  