There are several possibilities:
I am blind
Its too trivial
its not possible
its only for insiders
I just cannot figure out how to use a generated object in another project. i.e. to set up a library of objects (trees, stones, faces,…) as *.blend files to integrate them later in other projects. Append seems to import always just one special property. And other way round to export one object or a group of objects to another *.blend file omitting everything else (e.g. scripts).