> https://musicbrainz.org/doc/Cover_Art/Types >
> It seems there is a missing cover art type: inside.
> This describes the art on the opposite side of the front cover for a CD etc.
> that contains a simple two-sided print, or the inside panel(s) of a gatefold
> Booklet does not work, as this is "a small book or group of pages"
I would use booklet, as it is functionally the same as a booklet (the
artwork ends up in the same place as the back side of the booklet would)
> In that case the definition of booklet needs to be changed, but I don't see
> how booklet could be redefined as a single print on the reverse of the
> or back cover. Why would inside be too vague?
I'm not sure that it would be confusing, given the other types and descriptions. Providing it is defined correctly, something like: "artwork printed on the inside of the packaging, which is not any of the other types". I suppose that's a residual definition, and whilst in most cases I'm talking about the reverse side of a CD jewel case's front cover, the definition should also include the inner panels of a gatefold sleeve. In the context of the other types it should be clear enough.