1. A computer-implemented method for processing plural rights expressions associated with an item for use in a system for controlling use of the item in accordance with the rights expressions, the method comprising: receiving a request to use an item, the item having associated rights expressions governing use of the item; returning one or more rights expressions including conditions that must be satisfied in order to use the item; and processing the returned rights expressions in a manner to facilitate selection of the returned rights expressions in order to use the item in accordance with the selected rights expressions.