Hi

for instance,there are 2 associating tables
parent: sys_users, primary key id
child: bbs_topics, foreign key userid

I want 2 mapping files to bbs_topics,one has userid field still,and the other one use a set named SysUserSet replaced the userid field to associate with SysUsers.Thus,I can get userid contents directly using the first mapping file,and when I want to modify the sys_users's id field, using the second mapping file can implement bbs_topics's auto modification.

sb help?

i dont really get what you are asking for but try and read about entity-name ?