特殊用法canonical ordering1.典范次序关系complete ordering1.完全有序conjunctive ordering1.连接次序cyclic ordering1.循环序向directional ordering1.指向有序disjunctive ordering1.外接次序distinctly different ordering1.互异排序dual ordering1.对偶序natural ordering1.自然顺序关系partial ordering1.部分顺序periodic ordering1.控制存货的定期进货法total ordering1.全序weak ordering1.弱序化ordering by merging1.合并排序; 并项成序