If I understand the current limitations correctly, this would be a Holy Grail for managing different object libraries and still producing standardized information for scheduling and export to IFC.
A generalized example. Window objects from different manufacturers obviously store their technical information in different gdl parameters (say fire rating for example), as there is no standard for parameter names. Now, if I could set up a formula using if-statements that checks the object name (or part of it) and based on that information maps the correct gdl parameter with appropriate text formatting functions into a general, standardized element property for all windows, this would be revolutional for managing scheduling and export in projects with objects from multiple vendors.