The manifest resource currently allows an array of media types to be declared for an object. However, there are situations where an object may have more than one version and each version of the object may be in a different version of STIX. There is no way for the manifest resource to say that this version is in this media type and this version is in that media type.

As a side note, I am not sure putting the media types on the manifest record is a good thing. I am thinking that it would be better to advertise this at the API root or collection level. Or if we need to keep it, it should be changed from a list of media types to just a string value and force all versions to be of a single version.