Patent ID: 8782547

Claim:
A display controller for a building control system, wherein the building control system includes one or more building control devices, and wherein at least selected building control devices have one or more corresponding objects, the display controller comprising: a display configured to display information related to one or more of the building control devices; and a display controller programmed to display the information related to the one or more building control devices on the display, wherein the display controller provides a user interface for allowing a user to interact with a configuration mechanism to define at least part of a user definable object description reference string (ODRS) definition, wherein the user definable object description reference string (ODRS) definition comprises a string that has at least one conditional expression that includes one or more logical operators and two or more tokens, wherein each of the two or more tokens reference one or more object properties of a selected object of the corresponding building control device, the display controller displaying an object property indicated by a first condition of the at least one conditional expression unless the object property indicated by the first condition of the at least one conditional expression is not available for a corresponding building control device, wherein the object description reference string (ODRS) is parsed by the display controller to determine the information to be displayed.