Patent ID: 6920436
Filing Date: 2005-07-19
Classification: G06F,G06Q,H04L,H04N,Y10S

Abstract:
1. A digital work organized into an acyclic structure for use within a system for enforcing usage rights associated with content, said digital work comprising: a contents file including information related to content that can be interpreted by an interpreter; and a description tree file including descriptor blocks organized in a hierarchical manner, at least some of said descriptor blocks containing usage rights associated with the content, said usage rights specifying a manner of use for the content, wherein at least one of said descriptor block comprises a content identifier and a rights portion, said content identifier including a unique identifier of content and said rights portion containing said usage rights, wherein said contents file comprises plural content portions, wherein said rights portion comprises a rights code field containing a code indicative of a manner of use of the digital content and a status information field containing information relating to a state of the manner of use, wherein at least one of said descriptor blocks does not include a content identifier and includes a pointer to a child descriptor block and a usage rights portion containing usage rights information associated with said child descriptor block, and wherein said usage rights portion comprises a transactional component including a specification of said manner of use for the associated digital content and a specifications component specifying conditions that must be satisfied to exercise the manner of use or transaction related parameters.