protected function parseAttributes($attributes) {
        $this->no_inferiors = ($attributes & LATT_NOINFERIORS) ? true : false;
        $this->no_select    = ($attributes & LATT_NOSELECT) ? true : false;
        $this->marked       = ($attributes & LATT_MARKED) ? true : false;
        $this->referal      = ($attributes & LATT_REFERRAL) ? true : false;
        $this->has_children = ($attributes & LATT_HASCHILDREN) ? true : false;
    }