As a result of code moving to open source (GMF and EMFT) and some other refactoring, there are new modeling components and exposed packages containing public API. The following diagram and the associated information describe the public components and API packages in the current Rational modeling products that existed in the previous version. Some of these components will now have more extensibility APIs available.

The extensibility API documentation is available in the online help for the Rational modeling products, within the "Extending Rational product functionality" topics. Eclipse on-line reference material that describes the public APIs is available in the Eclipse opensource components at help.eclipse.org.