Hi again,
Hope I'm not draining to much time from you guys !

here is the scenario (fake one just to understand the logic..):
My main logbook as a Option attribute Called "Electrician availables" 
My second logbook is a list of workers and there capacities Moptions : "Electrician", "Plumber", "Genius"

So my question is:

Is it possible to load my main logbook attribute "Electrician availables" Options based on all the "Electrician" found under my second logbook ?

Thanks :)