EIFs can contain business data, control data and rules based data.

Real Time and Embedded Systems: For example, Telephone Switching is made of all three types, Business Data, Rule Data and Control Data. Business Data is the actual call, Rule Data is how the call should be routed through the network, and Control Data is how the switches communicate with each other.

Business Applications: An example of Business data is customer names, addresses, phone number, so on and so forth. An example of Rules Data is a table entry that tells how many days a customer can be late before they are turned over for collection.