Each of the interfaces in your information model can expose methods. Attach a new method to an interface by creating an instance of the MethodDef class.
To create a new method definition
Note If your interface has methods, you must provide your own Automation server for classes that implement this interface. For more information about deciding which kind of Automation server to use, see Information Model Creation Issues.
Add Properties to Each Interface
Add Relationship Types and Pairs of Collection Types