Some questions about runtime spec

Hi all,
     After reading the spec, I'm still a little bit unclear about the 
following points. I'll appreciate it if anyone could give me some pointers.

 1. The 'launch()' 'install()' 'uninstall()' 'applyupdate()' are
    separated to several different places, is it okay? looks like they
    should be put together in a management interface.
      * If it's a design consideration, it's still a little bit confuse
        regarding to the permissions. For example the
        Applicationmanagement.applyUpdate is restricted to privileged
        callers and what about Application.uninstall? or
        ApplicationRegistry.install?
 2. What's the exactly meaning of the "launch_path"? Does it means that
    all resources are located under origin+launch_path?
 3. A little bit confusion of mixing the packaged apps and offline
    application cache, I mean, both of them have resource stored locally.

Thanks!
Bai

-- 
- Ming, Bai