Patent ID: 7809644
Filing Date: 2010-10-05
Classification: G06F,G06Q,H04L,H04N,Y10S

Abstract:
1. A non-transitory digital work organized into an acyclic structure for use within a system for enforcing usage rights associated with digital content, the digital work comprising: a contents file including information related to digital content that is interpreted by an interpreter; and a description tree file including descriptor blocks organized in a hierarchical manner, at least some of the descriptor blocks including usage rights associated with the digital content, the usage rights specifying a manner of use of the digital content, wherein at least one of the descriptor blocks comprises a content identifier and a usage rights portion, the content identifier including a identifier of the digital content and the usage rights portion including the usage rights, the contents file comprises plural content portions, the usage rights portion comprises a rights code field including a code indicative of the manner of use of the digital content and a status information field including information relating to a state of the manner of use, the usage rights information is included in a data structure, and the data structure is a lookup table including the usage rights information.