function originalParentPathIdentificationString()
    {
        $originalParent = $this->originalParent();
        if ( $originalParent )
        {
            return $originalParent->attribute( 'path_identification_string' );
        }
        // original parent was moved or does not exist, return original parent path
        $path = $this->attribute( 'path_identification_string' );
        $path = substr( $path, 0, strrpos( $path, '/') );
        return $path;
    }