PREPARING AND PRESENTING CONTENT

摘要

Systems and techniques to prepare and present content. In general, in one implementation, a technique includes receiving information identifying a first streaming content element (165) describing a first scope of material, receiving information identifying a second streaming content element (165) describing a second scope of material, and describing a presentation (130) including the first streaming content element (165) and the second streaming content element (165) in a parent/child relationship. The second scope of material can be more detailed than the first scope and included in the first scope.