OptionalartistAll ARTIST values joined with , , when the file has any.
The track's key, built the way a track row's handle is: the native path (foobar2000's own path for a location that has none), with |subsong:N when subsong is not 0. It equals the handle of the same track in rows from library.query, playlist.getTracks and the like.
The file path in native form, or foobar2000's own path for a location that has none, such as a stream. It carries no subsong, so every track of a cue sheet or a multi-track file has the same path; handle tells them apart.
OptionalplayThe file's PLAY_COUNT tag, when it has one; not the playback statistics.
OptionalratingRating 0 to 5, 0 for unrated, read the same way as rating.get. When foobar2000 holds no information for the track, only the playback statistics are read, and the key is absent unless they carry a rating.
Subsong identifier inside the file, as a track row's subsong; 0 for a whole file.
OptionaltitleThe first TITLE value, when the file has one.
One changed track in
metadb:changed.