Deductive rule, integrity constraint, data derivation

There are several types of rules playing an important role in database systems. As opposed to simple database systems where the only reasoning service is query answering, more advanced database systems offer number of advanced reasoning services such as deductive query answering based on deductive rules and active input processing based on active rules. In this article we discuss the concept of active and deductive rules and describe a simple model that uses both of them

There are several types of rules playing an important role in database systems. As opposed to simple database systems where the only reasoning service is query answering, more advanced database systems offer number of advanced reasoning services such as deductive query answering based on deductive rules and active input processing based on active rules. In this article we discuss the concept of active and deductive rules and describe a simple model that uses both of them