oper build oper object classifi object type classifi classifi illeg argument except handl classifi classifi cl classifi classifi oper oper creat oper oper set oper oper set owner cl oper set visibl visibl kind vk oper set oper set leaf oper set root oper set queri oper set owner scope scope kind sk instanc oper set concurr concurr kind cck sequenti paramet paramet build paramet oper type paramet set kind paramet direct kind pdk paramet set oper 