Import data field type : how to import from other applications

Import data field type : how to import from other applications

Hi all,
I'm new to creator and I wish to link a form field to another form in a different application (shared or public), this form acts as a commun reference table for several applications.
Is that possible with creator and how can I do that ? When I use the import field, I see a reference to app name, form name and field name, but I do not know how to change the app name (set to my application by default).
 
Thanks