<http://schema.org/target>
"android-app://com.guardian/http/www.theguardian.com/commentisfree/2008/jul/11/2"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.theguardian.com/commentisfree/2008/jul/11/2?commentid=dc0c6ad0-1afd-4f4d-aaed-61c8c53fd6b2>