Primary object      :  Num as string   Date   Numeric   Logical   Prim/Cand/Reg   User Prim/Cand/Reg   String   String/Index exact   String as like
Advanced object :   In list   Or condition   Variable
Print object           :   Text print message   Edit print message

It displays all Vdf objects that have been used in this project.All objects are classified in tree categpries: 1) Primary objects 2) Advanced objects 3) Print message objects
Note : Advanced objects( InList or OrCondition) have been formed from primary object and these could not exist separately(independent).Primary objects must exist on form (visible or invisible) By every object there is a type of field for which the object has been applied.Which primary objects could form advanced objects have been showing by the arrows.