atom_ns хук-событие . WP 2.0.0

Fires at end of the Atom feed root to add namespaces.

Использование

add_action( 'atom_ns', 'action_function_name_9469' );
function action_function_name_9469(){
	// action...
}

Где используется хук

Код хука

...

/** This action is documented in wp-includes/feed-rss2.php */
do_action( 'rss_tag_pre', 'atom' );
?>
<feed
  xmlns="http://www.w3.org/2005/Atom"
  xmlns:thr="http://purl.org/syndication/thread/1.0"
  xml:lang="<?php bloginfo_rss( 'language' ); ?>"
  xml:base="<?php bloginfo_rss('url') ?>/wp-atom.php"
  <?php
  /**
   * Fires at end of the Atom feed root to add namespaces.
   *
   * @since 2.0.0
   */
  do_action( 'atom_ns' );
  ?>
 >
	<title type="text"><?php wp_title_rss(); ?></title>
	<subtitle type="text"><?php bloginfo_rss("description") ?></subtitle>

	<updated><?php
		$date = get_lastpostmodified( 'GMT' );
		echo $date ? mysql2date( 'Y-m-d\TH:i:s\Z', $date, false ) : date( 'Y-m-d\TH:i:s\Z' );
	?></updated>

	<link rel="alternate" type="<?php bloginfo_rss('html_type'); ?>" href="<?php bloginfo_rss('url') ?>" />
	<id><?php bloginfo('atom_url'); ?></id>
	<link rel="self" type="application/atom+xml" href="<?php self_link(); ?>" />

	<?php
...

...
 * @package WordPress
 */

header('Content-Type: ' . feed_content_type('atom') . '; charset=' . get_option('blog_charset'), true);
echo '<?xml version="1.0" encoding="' . get_option('blog_charset') . '" ?' . '>';

/** This action is documented in wp-includes/feed-rss2.php */
do_action( 'rss_tag_pre', 'atom-comments' );
?>
<feed
	xmlns="http://www.w3.org/2005/Atom"
	xml:lang="<?php bloginfo_rss( 'language' ); ?>"
	xmlns:thr="http://purl.org/syndication/thread/1.0"
	<?php
		/** This action is documented in wp-includes/feed-atom.php */
		do_action( 'atom_ns' );

		/**
		 * Fires inside the feed tag in the Atom comment feed.
		 *
		 * @since 2.8.0
		 */
		do_action( 'atom_comments_ns' );
	?>
>
	<title type="text"><?php
		if ( is_singular() ) {
			/* translators: Comments feed title. 1: Post title */
			printf( ent2ncr( __( 'Comments on %s' ) ), get_the_title_rss() );
		} elseif ( is_search() ) {
			/* translators: Comments feed title. 1: Site name, 2: Search query */
...