function bp_core_install_notifications() {
	$sql             = array();
	$charset_collate = $GLOBALS['wpdb']->get_charset_collate();
	$bp_prefix       = bp_core_get_table_prefix();

	$sql[] = "CREATE TABLE {$bp_prefix}bp_notifications (
				id bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY,
				user_id bigint(20) NOT NULL,
				item_id bigint(20) NOT NULL,
				secondary_item_id bigint(20),
				component_name varchar(75) NOT NULL,
				component_action varchar(75) NOT NULL,
				date_notified datetime NOT NULL,
				is_new bool NOT NULL DEFAULT 0,
				KEY item_id (item_id),
				KEY secondary_item_id (secondary_item_id),
				KEY user_id (user_id),
				KEY is_new (is_new),
				KEY component_name (component_name),
				KEY component_action (component_action),
				KEY useritem (user_id,is_new)
			) {$charset_collate};";

	$sql[] = "CREATE TABLE {$bp_prefix}bp_notifications_meta (
				id bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY,
				notification_id bigint(20) NOT NULL,
				meta_key varchar(255) DEFAULT NULL,
				meta_value longtext DEFAULT NULL,
				KEY notification_id (notification_id),
				KEY meta_key (meta_key(191))
			) {$charset_collate};";

	dbDelta( $sql );
}