Is it possible to implement such functionality? For example I want to make a class “Motherboards” that contain attributes “Manufacturer”, “Model”, “Form factor”, “Socket type”, “Memory module slot type”, “Chipset” etc. And when I fill attribute “Model”, perhaps it will be a lookup type, the other attributes must have predefined values for that model of motherboard and must be filled automatically. Me be I misunderstand the data model design in context of cmdbuild, but some other commercial software product have such functionality.