trackback_rdf() WordPress Function

function trackback_rdf( $deprecated = '' ) {
	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, '2.5.0' );
	}

	if ( isset( $_SERVER['HTTP_USER_AGENT'] ) && false !== stripos( $_SERVER['HTTP_USER_AGENT'], 'W3C_Validator' ) ) {
		return;
	}

	echo '<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
			xmlns:dc="http://purl.org/dc/elements/1.1/"
			xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/">
		<rdf:Description rdf:about="';
	the_permalink();
	echo '"' . "\n";
	echo '    dc:identifier="';
	the_permalink();
	echo '"' . "\n";
	echo '    dc:title="' . str_replace( '--', '&#x2d;&#x2d;', wptexturize( strip_tags( get_the_title() ) ) ) . '"' . "\n";
	echo '    trackback:ping="' . get_trackback_url() . '"' . " />\n";
	echo '</rdf:RDF>';
}
Uses	Description
wp-includes/class-pop3.php:stripos()
wp-includes/formatting.php:wptexturize()	Replaces common plain text characters with formatted entities.
wp-includes/functions.php:_deprecated_argument()	Mark a function argument as deprecated and inform when it has been used.
wp-includes/link-template.php:the_permalink()	Displays the permalink for the current post.
wp-includes/post-template.php:get_the_title()	Retrieves the post title.
wp-includes/comment-template.php:get_trackback_url()	Retrieves the current post’s trackback URL.