Glossary

• application music player  

  An object that plays media items without affecting the state of the iPod application. See also iPod music player, music player.



• default media library  

  The object that provides library change notifications to your application.



• filterable  

  Describes a media item property key that can be used to build a valid search predicate.



• filtering  

  Describes obtaining a subset of media items from the iPod library by employing a search based on one or more media property predicate objects.



• Genius Playlist  

  A sequence of music media items that is created algorithmically based on music characteristics. See also on-the-go playlist, Smart Playlist.



• iPod library  

  The set of media items on a device that a user has synced from iTunes on the desktop.



• iPod music player  

  An object that plays media items by controlling the built-in iPod application, sharing its state. See also application music player, music player.



• media item  

  A single piece of media (such as one song) in the iPod library. A media item can be of various types including audio, audio book, and podcast.



• media item artwork  

  An object that represents a graphical image, such as album cover artwork, associated with a media item.



• media item collection  

  A set of related media items from the iPod library.



• media item picker  

  A specialized view controller that you employ to provide a graphical interface for selecting media items.



• media property predicate  

  A filter in a media query for retrieving a specified subset of media items from the iPod library.



• media query  

  An object that contains a description of what to retrieve from the iPod library and how those retrieved items should be arranged.



• music player  

  An object that plays media items. See also application music player, iPod music player.



• on-the-go playlist  

  A sequence of media items created by a user on a device, rather than on a notebook or desktop computer. See also Genius Playlist, Smart Playlist.



• playback queue  

  A list of media items for playback by a music player.



• playback state  

  For iPod library access, describes the playback state of a music player; one of playing, stopped, paused, fast forward, or rewind.



• predicate  

  For iPod library access, a specification of a single logical condition to test media items against when searching the iPod library.



• repeat mode  

  For iPod library access, indicates whether or not the current playback queue repeats or plays through just once.



• shuffle mode  

  For iPod library access, indicates whether or not the current playback queue plays in user-specified order or in a shuffled order.



• Smart Playlist  

  A sequence of media items created automatically according to user-specified criteria. See also Genius Playlist, on-the-go playlist.