anchor.diff:  
   In Kaui, you can apply one or more tags to accounts and invoices, a tag being a single value. Tags in Kill Bill can be used to convey information about an object type. A tag can just provide information about an object (user tag) or it can actually affect how the object is handled in Kill Bill (control tag).
   
  -This section explains how to attach tags to accounts and invoices. It also describes the steps for creating the tag definitions on which a tag is based.
  +This section explains how to attach tags to accounts and invoices. It also describes the steps for creating the tag definitions on which a user tag is based.
   
   [NOTE]
   *Note:* You can use the API to attach tags to even more object types, such as payments and subscriptions. For more information, see the "Tags" section of the relevant object type section (for example, Payments) in the https://killbill.github.io/slate/[API Reference].
  
positive.code: 
  === Add a Tag Definition
  
  To create a new tag definition:
  
  . Open the Tag Definitions page as explain in "<<View All Tags>>".
  +
  
negative.code: 
  Kill Bill has two types of tags:
  
  * *Control tags*&#8212;Also referred to as _system tags_, these tags modify the behavior of the system. Kill Bill includes several control tags; see the API documentation for https://killbill.github.io/slate/#tag[a list].
  
  * *User tags*&#8212;These tags are not interpreted by Kill Bill; they are a way for admins or third-party systems to annotate specific existing resources. For instance, the support team could tag account resources associated with a specific customer to group them.
  
  [NOTE]
  *Note:* Kill Bill does not include default user tags.
  