4 ) we introduce a classical algorithm which can extract implication rules based on concept lattice . the algorithm builds lattice incrementally and updates the set of rules simultaneously . we modify the structure of lattic to meet our requirement of finding frequent itemsets ( 4 )介绍一种经典的基于概念格的提取蕴涵规则的算法，该算法增量式建格，同时更新规则集，我们根据需要对格结构进行相应修改，从而可以增量式获取频繁项集。
