If you are using Schema.org, you could include extra properties, apart from those required with the guidelines I don't Assume This really is a problem with markup Except there is one area instrinsically Completely wrong with JSON+LD formatted rich snippets (rather than the inline markup selection) This will aid to https://bookmarknap.com/story9872364/the-smart-trick-of-schema-for-a-json-that-no-one-is-discussing