WordPress at a glance
filter is not described

index_rel_link filter-hook . WP 1.0

Usage

add_filter( 'index_rel_link', 'filter_function_name_9268' );
function filter_function_name_9268( $link ){
	// filter...

	return $link;
}
$link
-

Where the hook is called

get_index_rel_link()
wp-includes/deprecated.php 2727
return apply_filters( "index_rel_link", $link );

Where the hook is used (in WP core)

Does not used.