variantCoverDefined in the bib.schema.org extension.
Canonical URL: http://schema.org/variantCover
A description of the variant cover for the issue, if the issue is a variant printing. For example, "Bryan Hitch Variant Cover" or "2nd Printing Variant".
Usage: Fewer than 10 domains
|Values expected to be one of these types|
|Used on these types|
Schema Version 3.2