Many Deductive Object_Oriented Database(DOOD) is put forward, for example O-logic, C-logic, IQL, IQL2, F-logic, LOGRES, LLO, LOL, DLT, Gulog, Coral++, Rock& Roll.

• 许多演绎的面向对象数据库被提出,例如O-logic,C-logic,IQL,IQL2,F-logic, LOGRES,LLO,lol, DLT,Gulog,Coral++,Rock &Roll。