Mediator enables you to define rules based on the message payload or message headers. You can select elements or attributes from the message payload or the message header and, based on the values in those elements or attributes, you can specify an action. For example, Mediator receives a file from an application or service containing data about new customers. Based on the country mentioned in the customer's address, you can route and deliver data to the database storing data for that particular country. Similarly, you can route a message based on the message header.

For more information about header-based routing, see How to Access Headers for Filters and Assignments.