An object-oriented development system for developing control schemes for facilities includes a device diagramming component for describing a physical description of a facility and a logical definition of a control scheme for the facility. The device diagramming component includes a mode for...http://www.google.de/patents/US5812394?utm_source=gb-gplus-sharePatent US5812394 - Object-oriented computer program, system, and method for developing control schemes for facilities 
