Templates applied to a specific interface format, or re-format, all messages processed by this interface. Interface level variables will override the same variables specified on a Global level but will be overridden by variables specified at a Connector, Carrier or Recipient level.
For example, if the Interface Template formats the message to standardize the Sender's Name to a static value, but a Connector, Carrier or Recipient template specifies a different value, messages passed through those Carriers or to those Recipients will use the Sender's Name variable from their own templates and ALL other variables from higher level templates.
To format an Interface Template, please review the Template Components section of the documentation.