Override non-vacant fields - when it really is enabled and for some subject from the Extender There exists a value in the initial snippet - we use the worth from the Extender. "residence/class" is not present in Schema.org: mistake; house/course not present in Schema.org definitions Product mark up permits you https://messiahsspli.sharebyblog.com/28266406/sample-json-from-schema-can-be-fun-for-anyone