A playlist file can be used by Windows Media Services to stream a sequence of content, such as digital media files, encoder URLs, and other content server locations, to users from a publishing point. Playlist files can be either server-side or client-side. Server-side playlist files allow you to manage the playlist on the server while clients are receiving the content. Client-side playlists are transferred to the player, which then manages all of the content items. In client-side playlists, content references cannot be modified by the server.