• Specification:
  • Each plug-in module should declare one or more extensions. They add functionality to extension points defined in other modules.
  • Plug-ins may also declare extension points. These are places that allow adding functionality to the developed plug-in.
  • Plug-ins must have:
    • source code
    • tests( unit, integration)
    • configuration files
    • build files
    • compiled code.
  • They may also have:
    • resources
    • external libraries.
    • temporary files and folders