Patent ID: 8464356

Claim:
A system comprising: a. a content store for storing content including a plurality of content items, wherein the plurality of content items are a part of a content group having group licensing information that restricts the use of the content group as a unit; b. a personal library coupled to the content store for providing use management of the content group such that use of the plurality of content items of the content group complies with the restrictions of the group licensing information, wherein to provide the user management the personal library incorporates a data block with the content that includes a valid content indicator and a content list indicating valid content and invalid content based on use management information; and c. a plurality of user devices in communication with the personal library for receiving and presenting the content on each device of the plurality of user devices, wherein a push notification is used by the personal library to notify a trigger to start a synchronization protocol but a content transmission of the synchronization protocol is initiated by a user.