Fecha de publicación: 07/07/2005 Fuente: Wipo "digitalization" A method, system, and devices for controlling distribution and use of digital works based on one or more usage rights associated with and specifying how a digital work can be used or distributed and created from a grammar suitable for defining instances of usage rights. A plurality of devices store and exchange digital works and include a requestor device to request access to a digital work, the request specifying a usage right including a manner of use for the digital work. A server device processes the request to access the digital work based on the usage right specified in the request. Access to the digital work is granted in accordance with the manner of use specified by the usage right. The request to access the digital work is granted only if the usage right specified by the request is associated with the digital work for which the access is requested.