Clarify Atom Binding 2.3 table's description of #contentType

The table in Atom Binding 2.3 seems to imply that DocumentArtifact#contentType == the media link type. Isn't that incorrect? An XmlDocument's content type should be "application/xml", not the media link's "application/atom+xml;type='entry'". content type is not the same as an atom link.