A system for controlling the distribution and use of digital works using digital tickets. The privilege state data can include graphical symbols indicating on, inherited on, public on, off, not set, and disabled states. The second portion of the heat transfer fluid flow then enters a second refrigerant circuit and exchanges heat with refrigerant in the second circuit. An amount of interest in the parking space may be determined based on the interest data. Starting with the catalog used by the customer, catalogs are search in order of ancestry until the owner of the rule is found.