rdf_ns
Action Hook: Fires at the end of the feed root to add namespaces.
Source: wp-includes/feed-rdf.php:29
rdf_header
Action Hook: Fires at the end of the RDF feed header.
Source: wp-includes/feed-rdf.php:55
rdf_item
Action Hook: Fires at the end of each RDF feed item.
Source: wp-includes/feed-rdf.php:84