The product package contains a compatible version of the Eclipse IDE or workbench; this bundled workbench is the base platform on top of which the functionality in the product is provided. If you have an Eclipse IDE on your workstation, then you have the option to extend it, that is, add to your current Eclipse IDE the additional functionality provided in the product.
Extending an Eclipse IDE adds the functions of the newly installed product, but maintains your IDE preferences and settings. Previously installed plug-ins are also still available.
Your Eclipse IDE and JRE must be at least at the minimum version levels that the product requires. See the product system requirements for details on the required versions. Installation Manager checks that the Eclipse instance that you specify meets the requirements for the installation package.