I noticed there are three distinctions Physical single releases ex Spring of a Twenty Year Old  iTunes Digital single releases ex Nagging  iTunes Promoted single releases ex Boo from Growing Up where a MV was created and she promoted the song actively on music shows  I think this can be done in anyway  there seems to be no standard Here are examples from other artists Wonder Girls Single albums both digital and physical and promoted single releases displayed separately Super Junior Divide into single albums and digital single albums Sunny Hill Divide into single albums and digital singles Korean IU discography Only single albums both digital and physical are listed Promoted tracks from an album are mentioned on the album description ignoring the charting details