do_action( 'atom_ns' ) Fires at end of the Atom feed root to add namespaces. ContentsDescription Source Changelog User Contributed Notes Description #Description Source #Source File: wp-includes/feed-atom.php View on Trac Top ↑Changelog #Changelog Changelog Version Description 2.0.0 Introduced. Top ↑User Contributed Notes #User Contributed Notes You must log in before being able to contribute a note or feedback.