Hi,

mirrors are copies of classes that have prefix Xxx and don't have own data
like shared pools. If you have got such classes for whole system, you may
modify, study and shrink them. If you prepare source codes for new system
in the mirror's world, you can replace current souce codes in your image
with codes of mirrors and recompile it.

This is the way how to prepare very small images with no user interface
and this self-bootstrapping environment creates one. It was just announced
and this is only the updated version.

-- Pavel