+ // Schema.org microdata
+ $a->page['htmlhead'] .= '<meta itemprop="name" content="'.$title.'" />'."\n";
+ $a->page['htmlhead'] .= '<meta itemprop="description" content="'.$description.'" />'."\n";
+ $a->page['htmlhead'] .= '<meta itemprop="image" content="'.$image.'" />'."\n";
+ $a->page['htmlhead'] .= '<meta itemprop="author" content="'.$author_name.'" />'."\n";
+
+ // Twitter cards
+ $a->page['htmlhead'] .= '<meta name="twitter:card" content="summary" />'."\n";
+ $a->page['htmlhead'] .= '<meta name="twitter:title" content="'.$title.'" />'."\n";
+ $a->page['htmlhead'] .= '<meta name="twitter:description" content="'.$description.'" />'."\n";
+ $a->page['htmlhead'] .= '<meta name="twitter:image" content="'.$image.'" />'."\n";
+ $a->page['htmlhead'] .= '<meta name="twitter:url" content="'.$r[0]["plink"].'" />'."\n";
+
+ // Dublin Core