Index: wp-includes/feed-rdf.php
===================================================================
--- wp-includes/feed-rdf.php	(revision 25365)
+++ wp-includes/feed-rdf.php	(working copy)
@@ -16,17 +16,33 @@
 	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
 	xmlns:admin="http://webns.net/mvcb/"
 	xmlns:content="http://purl.org/rss/1.0/modules/content/"
-	<?php do_action('rdf_ns'); ?>
+	<?php 
+	/**
+	 * Fired at the end of the feed root to add namespaces.
+	 *
+	 * @since 2.0.0
+	 */
+	do_action('rdf_ns'); 
+	?>
 >
 <channel rdf:about="<?php bloginfo_rss("url") ?>">
 	<title><?php bloginfo_rss('name'); wp_title_rss(); ?></title>
 	<link><?php bloginfo_rss('url') ?></link>
 	<description><?php bloginfo_rss('description') ?></description>
 	<dc:date><?php echo mysql2date('Y-m-d\TH:i:s\Z', get_lastpostmodified('GMT'), false); ?></dc:date>
+	<?php //duplicate_hook ?>
 	<sy:updatePeriod><?php echo apply_filters( 'rss_update_period', 'hourly' ); ?></sy:updatePeriod>
+	<?php //duplicate_hook ?>
 	<sy:updateFrequency><?php echo apply_filters( 'rss_update_frequency', '1' ); ?></sy:updateFrequency>
 	<sy:updateBase>2000-01-01T12:00+00:00</sy:updateBase>
-	<?php do_action('rdf_header'); ?>
+	<?php 
+	/**
+	 * Fired at the end of the RDF feed header.
+	 *
+	 * @since 2.0.0
+	 */
+	do_action('rdf_header'); 
+	?>
 	<items>
 		<rdf:Seq>
 		<?php while (have_posts()): the_post(); ?>
@@ -48,7 +64,14 @@
 	<description><![CDATA[<?php the_excerpt_rss() ?>]]></description>
 	<content:encoded><![CDATA[<?php the_content_feed('rdf') ?>]]></content:encoded>
 <?php endif; ?>
-	<?php do_action('rdf_item'); ?>
+	<?php 
+	/**
+	 * Fired at the end of each RDF feed item.
+	 *
+	 * @since 2.0.0
+	 */
+	do_action('rdf_item'); 
+	?>
 </item>
 <?php endwhile;  ?>
 </rdf:RDF>