1. The keyword qualifier is replaced with a timestamp when plug-ins or features are built.

2. The files are artifacts.jar and content.jar as well as one file per feature/plug-in built.

3. The older site.xml can be used, or a category.xml file which is essentially equivalent.

4. If a feature requires another, then it must be present in the Eclipse instance in order to install. If a feature includes another, then a copy of that included feature is included in the update site when built.

5. An application is a standalone application that can be run in any Eclipse instance when it is installed. A product affects the Eclipse instance as a whole, replacing the launcher, icons, and default application launched.

6. An application is a class that implements IApplication and has a start() method. It is referenced in the plugin.xml file and can be invoked by ID with -application on the command line.

7. A target definition is used to define set of plug-ins to compile against, when set as a target platform.