[Zope] Do objects have exist in DB to be shown in tree?

[Jacob Gorm Hansen]

Hi,

How is traversing the ZODB managed? Does Zope look up the root object
and ask it to (recursively) return a given child, or does it go through
the physical data itself?

I need to create a "folder" with subobjects mirrored from another
folder, so my subobjects won't be existing in the DB before somebody
modifies their values and saves the changes. Is this at all possible?

best,
Jacob