| 摘要 |
<p>In embodiments, apparatuses, methods and storage media are described that are associated with presentation of content using playlists. In various embodiments, a presentation engine ("PE") may consult a playlist associated with a content selection. The playlist may include playlist elements that are associated with time periods and may identify one or more pieces of content for presentation. The PE may facilitate retrieval and queuing of the pieces of content. In various embodiments, a hierarchical playlist may include one or more playlist elements at one or more hierarchical levels. In various embodiments, the PE may be configured to present content as directed by playlist elements at higher levels before consulting playlist elements at lower levels. For example, given a playlist that directs presentation of particular content, new content may be substituted through introduction of new higher-level playlist elements. Other embodiments may be described and claimed.</p> |
