IDL - Interface Definition Language
IDL is a language for defining what operations are available and how they should be invoked for each remote object.
- An IDL definition defines types of objects, their attributes, the methods they export and the method parameters.
IDL supports Object-Oriented concepts such as encapsulation, inheritance and polymorphism.
Each language mapping of IDL should be the same for all ORB implementations.
The language mapping includes language-specific data types and procedure interfaces.
An IDL unit is called a module and contains a set of class interfaces containing attributes and methods (similar to Java interfaces with variables and methods.)