Adaptable multi-representation building systems part

One or more embodiments of the invention enable a method, apparatus, article of manufacture, and data structure for an adaptable multi-representation building systems data structure in an application program. The data structure comprises a single object that can represent a real world component used throughout a building life cycle, from preliminary design throughout a life of the building. As design decisions are made, the single object can acquire further definition, gaining one or more characteristics that characterize and specify the real-world component. The single object and a connector of the object can recognize and automatically connect to a valid subsystem. Further, the single object can represent itself in multiple graphical and non-graphical displays.