public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(array('id, fully_specified_name, term', 'required'), array('id', 'length', 'max' => 10), array('fully_specified_name, term', 'length', 'max' => 255), array('id, fully_specified_name, term, systemic', 'safe', 'on' => 'search'));
}