Business system name. The first part is the name of the business system that is to receive the MessageObject. For example, an airline company might have a business system named FlightBookings.

Interface name. The second part is the name of an interface that is defined in the PI Integration Repository. The interface describes the data types, direction (inbound or outbound), and delivery mode (synchronous or asynchronous) of the MessageObject.

Interface namespace. The third part of the endpoint is an interface namespace. You can use the namespace to differentiate multiple interfaces that have the same name but different signatures and meanings. Suppose you have several interfaces named BookFlights; you would differentiate the interfaces by using a different namespace for each interface. Typically, the interface namespace is a URI.