ORDERED TRANSFER OF DIGITAL CONTENT ELEMENTS

摘要

1. A digital content system (20) comprising: a network-accessible digital content service (22) comprising a cache management subsystem (28) and a mass storage subsystem (30) comprising a plurality of playlists (32) that are variously related with multiple user accounts (34), each playlist (32) including one or more digital content items, and each playlist has one or more playlist attributes; and a plurality of portable digital content devices (24) operably connected to a network-accessible digital content service (22) via a network (26), each portable digital content device (36) comprising a memory (38) providing a local cache (40), and is associated with one of the many user accounts (34), and for each portable digital content device (36), the network-accessible digital content service (22) is configured to adaptively transfer two or more digital content items e playlists to the local cache (40) of this portable digital content device (36) based on the attributes of the playlist of each of two or more playlists. 2. The system of claim 1, wherein the digital content items of two or more playlists include one or more digital content items of a first playlist and one or more digital content items of a second playlist, wherein the first playlist has a higher priority playlist attribute transmission, and the second list is