So there must have great practical signification to add active rule to DM3 which is a distributed relational database management system and extend DM3 into DM3-ADB which is an active DBMS.

• 我们在分布式关系数据库系统DM3中引入主动规则,扩充DM3成主动数据库DM3-ADB,有着较大的实用意义。