public: enum Attribute_DataFlags {
  DATAFLAG_TITLE = 0x00000001,
  DATAFLAG_TRACKARTIST = 0x00000002,
  DATAFLAG_ALBUMARTIST = 0x00000004,
  DATAFLAG_ALBUM = 0x00000008,
  DATAFLAG_GENRE = 0x00000010,
  DATAFLAG_TRACKNUM = 0x00000020,
  DATAFLAG_DISCNUM = 0x00000040,
  DATAFLAG_YEAR = 0x00000080,
  DATAFLAG_YEARREL = 0x00000100,
  DATAFLAG_MOOD = 0x00000200,
  DATAFLAG_LYRICIST = 0x00000400,
  DATAFLAG_COMPOSER = 0x00000800,
  DATAFLAG_CONDUCTOR = 0x00001000,
  DATAFLAG_ORCHESTRA = 0x00002000,
  DATAFLAG_ORIGARTIST = 0x00004000,
  DATAFLAG_PUBLISHER = 0x00008000,
  DATAFLAG_COPYRIGHT = 0x00010000,
  DATAFLAG_COMMENT = 0x00020000,
  DATAFLAG_RATING = 0x10000000
};