1. A non-transitory machine-readable medium encoded with instructions for execution by a network device, the medium comprising: instructions for establishing an object representative of a subscriber record associated with a subscriber, comprising: instructions for configuring the object to access data from the subscriber record associated with the subscriber; instructions for evaluating operator-defined rules at run-time in connection with a received network message, comprising: instructions for accessing subscriber data via the object representative of the subscriber record in response to evaluating a reference that identifies the object and that is within an operator defined rule.