1. A method for defining rights applicable to a digital object, the method comprising: receiving a first initial right for the digital object from a set of initial rights and a first modifying right for the digital object, wherein the first initial right matches the first modifying right by being associated with a common action, the first initial right has an associated first initial condition and the first modifying right has an associated first modifying condition, the first initial condition and the first modifying condition each defines a restriction on the first right while allowing the right to be exercised and the first modifying condition is less restrictive than the first initial condition; receiving a second modifying right that matches a second initial right and a second modifying condition associated with the second modifying right, wherein the second modifying right is further modifying; and defining, using one or more processors, a new first condition on the first initial right and a new second condition on the second initial right, the new first condition being defined based on the first initial and first modifying conditions, and, the new second condition being defined based on the second initial and second modifying conditions, wherein the defining is performed by a digital rights management system.