+ * Defines relationships between tracks.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+ public enum Relationship {
+
+ /** The track is the original of a related track. */
+ original,
+
+ /** The track is a remix of a related track. */
+ remix,
+
+ /** The track is a cover version of a related track. */
+ cover,
+
+ }
+
+ /**