Only a person with administrative rights can backdate a Transaction.
只有具有行政权的人才可以将交易倒填日期。
2
This algorithm establish transaction-tree which is based on transaction database create frequent itemsetby backdate reversely from leaf nodes.
此算法主要利用事务数据库建立事务树的方法，由叶子结点反向回溯，导出频繁集。
3
Managing mode based on many edition of drawing database is expounded it recorded expressly the course of edition and backdate correctly for many edition.